A guide to the experimental data for π 0, η and η transition form factors and decay distributions
|
|
- Tamsin McKinney
- 5 years ago
- Views:
Transcription
1 A guide to the experimental data for π 0, η and η transition form factors and decay distributions S. Eidelman, C. Hanhart, B. Kubis 3, A. Kupść 4 and S. Leupold 4 May 7, 03 Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics, Forschungszentrum Jülich 3 HISKP (Theorie) and Bethe Center for Theoretical Physics, Universität Bonn 4 Uppsala University Abstract Overview of experimental data on meson transition form factors. Introduction The scope of the guide is to collect references to the experiments relevant to transition form factor of the lightest pseudoscalar mesons π 0, η and η. This covers in first place anomalous processes involving odd number of pseudoscalar fields and a vector (photon or a vector meson) particle. The focus of the review is on experimental distributions of the processes and thus the informations which are not normally contained in the particle properties reviews of the Particle Data Group. This project is follow up of MesonNet workshop on Transition Form Factors []. A Compilation of data on hadronic total cross-sections in e + e interactions is available [] on Hepdb In addition to the anomalous processes we include also informations on processes with even number of the pseudoscalar fields such as η π + π π 0 since representation of the dynamics of such processes should be done using Dalitz plot analysis. This is motivated by theory request to have directly access to Dalitz plot data instead of using parameters introduced by experiments. Comments concerning inclusion of radiative corrections, using of Dalitz plots are included. Two gamma processes reviews: [3, 4]. In the outlook we discuss further experiments possible with existing facilities.
2 π 0,η,η F π 0,η,η (*) γ (*) γ Figure : General Pγ γ vertex described by a transition form factor. Definitions A transition form factor F P (q,q ) is a scalar function of the four-momentum transfer squared of the virtual photons (q,) describing the vertex in Fig. and defined as A(P γ γ ( ) ) = q µ ǫ ν q α ǫ β ǫ µναβ F P (q,q ) () and m 3 P 64π F P(q = 0,q = 0) = Γ(P γγ). Brodsky-Lepage definition for γ P γ case [?]: [33, 0] A µ = ie F P (Q )ǫ µναβ m 3 P 64π F P(q = 0,q = 0) = One often uses a normalized transition form factor: F P (q,q ) = Γ(P γγ) (4πα). For example, for the neutral pion physical processes include F P (q,q ) F P (q = 0,q = 0). () π 0 γ: This is well described by the chiral anomaly encoded in the Wess Zumino Witten action, see, e.g., [?,?]. π 0 γe + e and π 0 e + e e + e : e + e π 0 e + e : Here two virtual photons can fuse in flight to form the pion. Another process involving the pion transition form factor is a very rare direct dilepton decay π 0 e + e. Two photons emitted in this process convert to a dilepton by lepton exchange, see Fig. 34c in [?]. The pion transition form factor enters the corresponding QED loop ; see, e.g., [?]. Inprinciple, thisprocessinterferesattheamplitudelevelwithe + e annihilation andsuccessiveemission of a pion and virtual photon.
3 Mode B exp Ref. B th Ref. π 0 γγ (98.83±0.034)% [5] π 0 e + e γ (.74±0.035)% [5] (.8±0.003)% [?] π 0 e + e e + e (3.34±0.6) 5 [5] π 0 e + e (7.48±0.9±0.5) 8 [6] (6.33±0.9) 8 [7] (8.3±0.4) 8 [8] (6.±0.) 8 [?] 3 BR Table : Branching fractions of π 0 leptonic decays. In Table we list the information on the branching fractions of π 0 decays together with the corresponding theoretical predictions. The branching ratios follow largely the naive scaling as : α QED : α QED : (α QED/(4π) ), where the factor (4π) appears, since in the Standard Model the leading contribution is at one loop. Note, between the most accurate calculation for π 0 e + e and the corresponding experimental value there is a more than 3σ discrepancy. In Tables and 3 we show the branching fractions of the η and η purely leptonic decays. Mode B exp Ref. B th Ref. η γγ (39.3±0.0)% [5] η e + e <.7 5 [9] (5.8±0.) 9 [8] η µ + µ (5.8±0.8) 6 [5] η e + e γ (7.0±0.7) 3 [5] η µ + µ γ (3.±0.4) 4 [] η e + e e + e (.4±0. stat+bckg ±0. syst ) 5 [] η e + e µ + µ <.6 4 [9] η µ + µ µ + µ < [9] 3 This involves processes like Table : Branching fractions of η leptonic decays ω π 0 l + l where l = e,µ: For an illustration see Fig.. This process shows a dramatic deviation from the vector meson dominance picture [5, 6], see Fig. 6. φ instead of ω in the previous processes and/or η instead of π 0 (in part measured): It would be important to clarify whether also in these processes the drastic deviation from vector meson dominance seen in ω π 0 µ + µ shows up. Of particular importance is φ π 0 l + l where the peak mass of the ρ meson is in the kinematically allowed region. The value given in Ref [5], (6.46±0.33) 8, is not corrected for final state radiation. 3 Since the authors do not distinguish between the µ + µ µ + µ and µ + µ π + π final states, the upper limit is for a sum of the branching fractions for the two modes. 3
4 Mode B exp Ref. B th Ref. η γγ (.8±0.08)% [5] η e + e <. 7 [] (.5±0.) [8] η µ + µ (.±0.3) 7 [8] η e + e γ < 9 4 [3] η µ + µ γ (.07±0.6) 4 [4] Table 3: Branching fractions of η leptonic decays. Figure : Transition form factor of omega to pion. η ωγ (measured) and η ωe + e (not measured). 3. Transition form factors For asymptotically large virtualities there are QCD constraints on the pion transition form factor, see, e.g. [?,?,?]. This might be at odds with recent experimental results from BaBar [0]; see, however, also the recent Belle results []. Single off-shell form factors can be studied in:. pseudoscalar meson decays P l + l γ (4m l < q < m P ). e + e Pγ (q > m P ) σ(e + e Pγ) = 4πα QED Γ γγ ( s m P sm P ) 3 F P (q = s,0) (3) Figure 3: Tree-level contribution to the omega transition form factor. 4
5 Mode B exp Ref. B th Ref. ω π 0 e + e (7.7±0.6) 4 [5] ω π 0 µ + µ (.73±0.5±0.4) 4 [5] (0.96±0.3) 4 [7] ω ηe + e <. 5 [8] Table 4: Branching fractions of ω conversion decays. Mode B exp Ref. B th Ref. φ π 0 e + e (.±0.8) 5 [5] φ ηe + e (.5±0.) 4 [5] φ ηµ + µ < [9] Table 5: Branching fractions of φ conversion decays 3. two-photon production: e.g.,: in e e ± interactions and Primakoff process. (q < 0) σ γ γ P = 6π Γ m 3 γγ F(q,q ) (q q ) qq δ ( ) (q +q ) m P P A transition of the omega meson to pion is given by the two-dimensional π 0 form factor as: F π 0(q,m ω) / F π 0(0,m ω). It was measured in ω π 0 l + l and in e + e ωπ 0 reaction. The results are shown in Fig. 6 together with naive VMD predictions. Note that the region around q m ω is just included for completeness. There, the equations (??), (??) do not provide a good approximation. 3. Dalitz decays The q, for the conversion (Dalitz) decays (Fig. 7) is equal to the invariant mass squared of the lepton-antilepton pair and m P q, 4m l (time-like virtual photons). The amplitude of the single conversion decay of a pseudoscalar meson P is given by: A(P l + l γ) = ief P (q,0)ǫ µνστ ε µ q ν ε σ q [ūγ τ u] (4) where /q is the photon propagator and the last term is the leptonic current. Experimentally the form factor could be extracted from the q distribution given by: dγ(p l + l γ) = α ( ) 3 4m l + m l )( q F dq Γ γγ 3π q q q MP P (q,0). (5) The distributions for η Dalitz decays are presented in Fig. 8. The distributions for the e + e γ final states are peaked at 4m l due to the /q QED term. The form factor can be obtained by dividing out the QED dependence. To extract form factor slope a dependence 5
6 =0),q F π 0 (q [GeV Figure4: Singleoff-shellπ 0 mesontransitionformfactorinthelow q regionfromsnd[] and CMD- [3] data on the reaction e + e π 0 γ and CELLO data on the reaction e + e e + e γ γ e + e π 0 [4] q ] 6
7 =0),q (q η F 3 γγ* η - l + η γ l - - e + e γη [GeV Figure 5: Single off-shell η meson transition form factor from NA60 data on η γµ + µ decay [5]; from SND [] and CMD- [3] data on the reaction e + e ηγ reaction, and CELLO data on the reaction e + e e + e γ γ e + e η [4]. q ] 7
8 ) ω / F π 0 (0,m,m ω ) F π 0 (q ω π l l e e ωπ [GeV Figure 6: Data on the ω transition form factor F π 0(q,m ω) / F π 0(0,m ω) from NA60 data on ω π 0 µ + µ decay [5] and from SND [5], CMD- [6], and KLOE [7] experiments on the e + e ωπ 0 reaction. q ] l l η γ* γ η γ* γ* l, Figure 7: Single and double Dalitz decays 8
9 dγ/dq q [GeV ] Figure 8: dγ/dq distributions for single Dalitz decays of η meson: (left) solid line η e + e γ with F η (q,0) = ; dotted line η µ + µ γ with F η (q ) = ; dashed line η e + e γ with the VMD form factor. b π 0(q ) [GeV ] b π 0(q = 0).79 ± 0.4 CELLO [4] b π 0(q = 0.63GeV ).36 ± 0. Lepton-G [7] b π 0(q = 0.63GeV ).4 ± 0.06 ± 0.0 NA60 [5] b π 0(q = 0.63GeV ).4 ± 0.05 ± 0.08 NA60 [6] b η (q ) [GeV ] b η (q = 0).9 ± 0.4 Lepton-G [] b η (q = 0).4 ± 0. CELLO [4] b η (q = 0GeV ).6 ± SND [] b η (q = 0).95 ± 0.7 ± 0.05 NA60 [5] b η (q = 0).9 ± 0.35 ± 0.3 CB/TAPS [8] b η (q =.04GeV ) 3.8 ±.8 SND [] Table 6: Summary of the available experimental data on b η (q ) and b π 0(q ). on the q variable is fitted with a single-pole formula, which at low energies q Λ can be approximated successively as follows: F(q,0) = Λ Λ q iγλ Λ q + Λ q Λ. (6) The form factor slope b P (0) is therefore related to Λ: b P (0) dlnf(q,0) dq = q =0 Λ. (7) Available data on F π 0 and F η for low q values are presented in Figs 4, 5, and 6. 9
10 4 Radiative and hadronic anomalous processes Finally, there is one more twist: The ρ meson is rather broad and couples to two pions. Therefore processes, which involve two pions instead of a dilepton, are also intimately connected to the previous reactions. This involves, e.g., η π + π γ ( ). There are indications for deviations from vector-meson dominance[9,?]. (Of course, this logic can be extended to reactions with three pions instead of an ω or φ. But then there are a lot of different channels which interfere with each other.) For a collection of data, a list of possible reactions might be useful. This is provided in the appendix. DATA on eta,eta to pi+pi-g![9, 30] prospects eta BESIII, CLAS A List of processes The focus is on reactions, which are possible to study in practice. For example, scattering reactions with initial-state neutral pions (like π 0 γ something) are not considered because there are no π 0 beams available. There is a charged-pion beam, though, (COMPASS at CERN), and collisions with photons can be achieved using the Primakoff effect. Likewise, reactions with initial-state muons are not listed, though this is one of the future dreams of high-energy physicists. Reactions, which involve a broad ρ meson, are listed in the following as π + π. In principle, reactions like e + e π + π and e + e π 0 ω are related to τ ν τ π π 0 and τ ν τ π ω through conservation of vector current and isospin symmetry [?]. Decays of the τ are not listed below.. Processes with one external (pseudoscalar) hadron: π 0 (a) π 0 γ: BR,Γ (b) π 0 γe + e : BR, F(q,0) SINDRUM (99) [3] Prospects: KTeV, WASA-at-COSY, NA48 (c) π 0 e + e e + e : BR, F(q,0) (d) π 0 e + e (e) e + e π 0 γ: SND (000) [36] (sig GeV) CMD- (005) [3] (sig GeV) SND (003) [3] (sig at GeV) (f) e + e π 0 e + e this contains s and t contributions which could be well separated by kinematic cuts: CELLO (990) [4] s = 35 GeV CLEO (997) [33] s =.6 GeV q =.5 9 GeV BaBar (009) [0] Belle (0) []
11 (g) e e π 0 e e (h) e γ π 0 e (i) e + e π 0 µ + µ. Processes with one external (pseudoscalar) hadron: η (a) η γ (b) η γe + e SND (000) [] CB/TAPS (0) [8] (c) η γµ + µ Lepton-G (980)[] NA60 (009) [5] (d) η e + e e + e : KLOE (0) [] 36±9 events BR (.4±0. stat+bckg ±0. syst ) 5. CMD- (000)[9] BR UL CELSIUS/WASA (008) [9] BR UL (e) η e + e µ + µ (f) η µ + µ µ + µ (g) η e + e (h) η µ + µ (i) e + e ηγ SND (997) [34].00 GeV CMD- (999) [35](sig GeV) η π + π π 0 SND (000) [36] (sig at GeV) CMD- (00) [37] (sig GeV) η 3π 0 CMD- (005) [3] (sig GeV) η γγ BaBar (006) [38] E=.58 GeV stat ±0.3 syst fb SND (006) [39] two sets: η 3π 0 ( GeV) and η π + π π 0 ( GeV) SND (007) [40] reanalysis of [39] KLOE (0) [4] s= GeV cross section 856±8 stat ±6 syst pb P0 e + e ηe + e CELLO (990) [4] CLEO (997) [33] s =.6 GeV.5 0 GeV BaBar (0) [?] s =.6 GeV 40 < q < 4 GeV KLOE (0) [4] s= GeV cross section t channel, 3.7 ±.7 stat ± 0.70 syst pb
12 (j) e + e ηµ + µ 3. Processes with one external (pseudoscalar) hadron: η (a) η γ (b) η γe + e (c) η γµ + µ (d) η e + e e + e (e) η e + e µ + µ (f) η µ + µ µ + µ (g) η e + e (h) η µ + µ (i) e + e η γ BaBar [38] E=.58 (j) e + e η (988) [] search for η ηππ final state (k) e + e η e + e CELLO (990) [4] CLEO (997) [33].5 to 9, 0, and 30 GeV L3 (998) [4] BaBar (0) [?] s =.6 GeV 40 < q < 4 GeV P03 e + e η µ + µ 4. Processes with two external (narrow) hadrons: π 0 and a vector meson (a) ω π 0 γ (b) ω π 0 e + e (c) ω π 0 µ + µ Lepton-G (980) [7] NA60 (009) [5] NA60 (0) [6] (d) e + e ωπ 0 ND (986) [43].0 < E <.4 GeV CMD- (989) [44].05 < E <.38 GeV ω π + π π 0 DM (990) [45] E 350-MeV MeV SND (000) [5]: E <.4 GeV with decay ω π 0 γ CMD- (003) [6] 90-MeV MeV ω π 0 γ CMD-(003)[46]e + e π 0 π 0 γ inc.m. energyrange600-mevto970-mev
13 KLOE (008) [7] SND (0) [47]. < E <.9 SND (03) [48].05 < E <.0 GeV preprint (e) φ π 0 γ (f) φ π 0 e + e SND (000) [] (g) φ π 0 µ + µ (h) e + e φπ 0 5. Processes with two external (narrow) hadrons: η and a vector meson (a) ω ηγ (b) ω ηe + e (c) ω ηµ + µ (d) e + e ωη (e) φ ηγ (f) φ ηe + e (g) φ ηµ + µ (h) e + e φη 6. Processes with two external (narrow) hadrons: η and a vector meson (a) η ωγ (b) η ωe + e (c) e + e ωη (d) φ η γ (e) φ η e + e (f) e + e φη 7. Processes with three external (pseudoscalar) hadrons: π 0 π + π (a) π ± γ π 0 π ± (b) e + e π 0 π + π 8. Processes with three external (pseudoscalar) hadrons: ηπ + π (a) η π + π γ old data... WASA-at-COSY (0) [9] dn/de γ KLOE (0) [30] dn/dm ππ 3
14 q range F π 0(q,0) Year/Ref. comment ± 0.4 CELLO(990)[4] M(P=3)**/64/PI*F ± 0.4 CELLO(990)[4] M(P=3)**/64/PI*F ± 0. CELLO(990)[4] M(P=3)**/64/PI*F ± 0.05 CELLO(990)[4] M(P=3)**/64/PI*F ± 0.06 CELLO(990)[4] M(P=3)**/64/PI*F Table 7: Data on F π 0(q,0) (b) η π + π e + e (c) η π + π µ + µ (d) π ± γ ηπ ± (e) e + e ηπ + π 9. Processes with three external (pseudoscalar) hadrons: η π + π (a) η π + π γ Data: C- Barrel, L3,... Prospect: BESIII, CLAS (b) η π + π e + e (c) η π + π µ + µ (d) π ± γ η π ± (e) e + e η π + π Note that the coupling of three neutral pseudoscalars to a photon breaks charge-conjugation invariance. In principle, one could add to the list processes with more external hadrons, e.g., η π + π π + π and η π + π 0 π π 0 which could proceed via two virtual ρ mesons. For a theoretical discussion of these decays see Ref. [?]. The list is restricted to four or less external states, but counting the virtual photon as one state. B Decay distributions for η and η decays into three pseudoscalar mesons C Acknowlegements We acknowledge the support of the European Community Research Infrastructure Integrating Activity Study of Strongly Interacting Matter (acronym HadronPhysics3, Grant Agreement n. 8386) under the Seventh Framework Programme of the EU. 4
15 Table 8: The Q interval, the weighted average Q value for the interval (Q ), the e + e e + e π 0 cross section (dσ/dq (Q )), and the product of the γγ π 0 transition form factor F(Q ) and Q. The quoted errors are statistical and systematic for the cross section, and combined for the form factor. In the table we quote only Q -dependent systematic errors. The Q -independent systematic error is 3% for the cross section and.3% for the form factor.calculate F Q interval Q dσ/dq (Q ) Q F(Q ) (GeV ) (GeV ) (fb/gev ) (MeV) ±4.6± ± ±.9± ± ±.5±. 57.4± ±.± ± ±.± ± ±0.86± ± ±0.69± ± ±0.56± ± ±0.48± ± ±0.4±0. 9.6± ±0.9± ± ±0.6± ± ±0.0± ± ±0.4± ± ±0.09± ± ±0.07± ±0.04±
16 References [] E. Czerwinski et al., (0), arxiv: [] M. Whalley, J.Phys. G9 (003) A. [3] D. Morgan, M. Pennington and M. Whalley, J.Phys. G0 (994) A. [4] M. Whalley, J.Phys. G7 (00) A. [5] Particle Data Group, J. Beringer et al., Phys.Rev. D86 (0) 000. [6] KTeV Collaboration, E. Abouzaid et al., Phys.Rev. D75 (007) 004, arxiv:hepex/0607. [7] L. Ametller, A. Bramon and E. Masso, Phys.Rev. D48 (993) 3388, arxiv:hepph/ [8] D. Gomez Dumm and A. Pich, Phys.Rev.Lett. 80 (998) 4633, arxiv:hep-ph/ [9] CELSIUS/WASA Collaboration, M. Berlowski et al., Phys.Rev. D77 (008) 03004, arxiv: [] R. Dzhelyadin et al., Phys.Lett. B94 (980) 548. [] KLOE- collaboration, F. Ambrosino et al., Phys.Lett. B70 (0) 34, arxiv: [] P. Vorobev et al., Sov.J.Nucl.Phys. 48 (988) 73. [3] CLEO Collaboration, R.A. Briere et al., Phys.Rev.Lett. 84 (000) 6, arxiv:hepex/ [4] R. Dzhelyadin et al., Sov.J.Nucl.Phys. 3 (980) 50. [5] NA60 Collaboration, R. Arnaldi et al., Phys.Lett. B677 (009) 60, arxiv: [6] NA60 Collaboration, G. Usai, Nucl.Phys. A855 (0) 89. [7] R. Dzhelyadin et al., Phys.Lett. B (98) 96. [8] CMD- Collaboration, R. Akhmetshin et al., Phys.Lett. B63 (005) 9, arxiv:hepex/ [9] CMD- Collaboration, R. Akhmetshin et al., Phys.Lett. B50 (00) 9, arxiv:hepex/0039. [0] BABAR Collaboration, B. Aubert et al., Phys.Rev. D80 (009) 0500, arxiv: [] Belle Collaboration, S. Uehara et al., Phys.Rev. D86 (0) 09007, arxiv:
17 [] M. Achasov et al., Phys.Lett. B504 (00) 75. [3] CMD Collaboration, R. Akhmetshin et al., Phys.Lett. B605 (005) 6, arxiv:hepex/ [4] CELLO Collaboration, H. Behrend et al., Z.Phys. C49 (99) 40. [5] M. Achasov et al., Phys.Lett. B486 (000) 9, arxiv:hep-ex/ [6] CMD- Collaboration, R. Akhmetshin et al., Phys.Lett. B56 (003) 73, arxiv:hepex/ [7] KLOE collaboration, F. Ambrosino et al., Phys.Lett. B669 (008) 3, arxiv: [8] H. Berghauser et al., Phys.Lett. B70 (0) 56. [9] WASA-at-COSY Collaboration, P. Adlarson et al., Phys.Lett. B707 (0) 43, arxiv: [30] KLOE Collaboration, D. Babusci et al., Phys.Lett. B78 (03) 9, arxiv:9.46. [3] SINDRUM-I Collaboration, R. Meijer Drees et al., Phys.Rev. D45 (99) 439. [3] M. Achasov et al., Phys.Lett. B559 (003) 7, arxiv:hep-ex/ [33] CLEO Collaboration, J. Gronberg et al., Phys.Rev. D57 (998) 33, arxiv:hepex/ [34] SND Collaboration, M. Achasov et al., (997), arxiv:hep-ex/9707. [35] CMD Collaboration, CMD-, R. Akhmetshin et al., Phys.Lett. B460 (999) 4, arxiv:hep-ex/ [36] M. Achasov et al., Eur.Phys.J. C (000) 5. [37] CMD- Collaboration, R. Akhmetshin et al., Phys.Lett. B509 (00) 7, arxiv:hepex/ [38] BABAR Collaboration, B. Aubert et al., Phys.Rev. D74 (006) 00, arxiv:hepex/ [39] M. Achasov et al., Phys.Rev. D74 (006) 0406, arxiv:hep-ex/ [40] M. Achasov et al., Phys.Rev. D76 (007) 077, arxiv: [4] KLOE- Collaboration, D. Babusci et al., JHEP 30 (03) 9, arxiv:.845. [4] L3 Collaboration, M. Acciarri et al., Phys.Lett. B48 (998) 399. [43] S. Dolinsky et al., Phys.Lett. B74 (986)
18 [44] CMD Collaboration, R. Akhmetshin et al., Phys.Lett. B466 (999) 39, arxiv:hepex/ [45] DM Collaboration, D. Bisello et al., (990). [46] CMD Collaborations, R. Akhmetshin et al., Phys.Lett. B580 (004) 9, arxiv:hepex/030. [47] M. Achasov et al., JETP Lett. 94 (0). [48] M. Achasov et al., (03), arxiv:
Meson Transition Form Factorsexperimental
Meson Transition Form Factorsexperimental results Patrik Adlarson Johannes Gutenberg Universität, Mainz, A2 collaboration Hadron-China Friday Aug 7, 2015 1 Outline Introduction Space Like TFF Time Like
More informationLight Meson Decays at BESIII
Light Meson Decays at BESIII Liqing QIN (for the Collaboration ) Shandong University XVI International Conference on Hadron Spectroscopy Sep. 13-18, 2015, Newport News, VA OUTLINE n Introduction n Recent
More informationLight hadrons at e+e- colliders
Light hadrons at e+e- colliders Andrzej Kupsc Experiment: e+e- colliders Dispersive methods for hadronic contribution to muon g-2 Two hadrons: Pion form factor / η,η -> π+π-γ Three hadrons: Dalitz Plot
More informationLatest KLOE-2 results on hadron physics
Latest KLOE- results on hadron physics on behalf the KLOE- collaboration INFN-Sez. Roma "Tor Vergata", Via della Ricerca Scientifica, I-00, Rome E-mail: Dario.Moricciani@roma.infn.it We discuss recent
More informationThe η-meson Decay Program at WASA-at-COSY
Mitglied der Helmholtz-Gemeinschaft The η-meson Decay Program at WASA-at-COSY 31.08.2015 Daniel Lersch for the WASA-at-COSY collaboration Institute for Nuclear Physics The η-meson! " " " # #, (" + " -
More informationLight Hadron Decays at
Light Hadron Decays at Magnus Wolke Department of Physics and Astronomy Light Hadron Decays at Focus in this talk: Decays of η Magnus Wolke Department of Physics and Astronomy η and decays..are a perfect
More informationThe η-meson Decay Program at WASA-at-COSY
Mitglied der Helmholtz-Gemeinschaft The η-meson Decay Program at WASA-at-COSY 15.09.2015 Daniel Lersch for the WASA-at-COSY collaboration XVI International Conference on Hadron Spectroscopy The η-meson!
More informationStudy of the decays at Wasa-at-COSY. Elisabetta Prencipe on behalf of the Wasa Collaboration MesonNet Workshop, 17th -19th June 2013, Praha
Study of the decays at Wasa-at-COSY on behalf of the Wasa Collaboration MesonNet Workshop, 17th -19th June 2013, Praha Outline Introduction The Wasa-at-COSY detector decays in the pd reaction e+e e+e e+e
More informationISR physics at BABAR
SLAC-PUB-499 ISR physics at BABAR S.Serednyakov, Budker Institute of Nuclear Physics, Novosibirsk, Russia Abstract A method of measuring e+e- annihilation cross sections at low energy s < 5 GeV, using
More informationPhysics from 1-2 GeV
Physics from 1-2 GeV Caterina Bloise INFN, Frascati Laboratory, Italy What next LNF: Perspectives of fundamental physics at the Frascati Laboratory Frascati, November 11, 2014 1 / 19 1 Introduction 2 Kaon
More informationStudying η-meson Decays with WASA-at-COSY
Studying η-meson Decays with WASA-at-COSY Daniel Lersch 1, for the WASA-at-COSY Collaboration 1 Juelich Research Center, Germany Abstract. The η-meson is a unique tool in a way that it provides access
More informationPerspectives on η η physics
Perspectives on η η physics S. Giovannella (INFN LNF) F. Ambrosino (Università e Sezione INFN, Napoli) xpected data sample Working hypothesis: 20 fb 1 of integrated luminosity (a factor 10 more w.r.t.
More informationDalitz Decays of Pseudo-Scalar Mesons
Dalitz Decays of Pseudo-calar Mesons Michael Kunkel On behalf on the CLA collaboration Outline 1 Introduction Constituent Quark Model Form Factors 2 CLA etup 3 G12 Experiment 4 Current tate of the Art
More informationA data-driven approach to η and η Dalitz decays
A data-driven approach to η and η Dalitz decays Rafel Escribano 1,2, 1 Grup de Física Teòrica, Departament de Física, Universitat Autònoma de Barcelona, E-08193 Bellaterra (Barcelona), Spain 2 Institut
More informationMeasurement of the e + e - π 0 γ cross section at SND
Measurement of the e + e - π 0 γ cross section at SND L.Kardapoltsev (for SND collaboration) Budker Institute of Nuclear Physics, Novosibirsk state university PhiPsi 2017, Mainz, Germany June 2017 Outline
More informationarxiv: v2 [hep-ex] 16 Nov 2007
Proceedings of the CHARM 2007 Workshop, Ithaca, NY, August 5-8, 2007 1 Recent studies of Charmonium Decays at CLEO H. Muramatsu Department of Physics and Astronomy, University of Rochester, Rochester,
More informationTransition Form Factors of Light Mesons
Transition Form Factors of Light Mesons New Frontiers in QCD 2018 May 28 - June 29, 2018 Yukawa Institute for Theoretical Physics, Kyoto University Susan Schadmand Thanks for workshop invitation YITP Kyoto
More informationReview of Standard Tau Decays from B Factories
Review of Standard Tau Decays from B Factories Fabrizio Salvatore, RHUL Tau mass measurement Tau decays to strange particles: - Measurement of V us using τ s decays - τ KKπν τ, KKKν τ branching fractions
More informationTowards a data-driven analysis of hadronic light-by-light scattering
Towards a data-driven analysis of hadronic light-by-light scattering Bastian Kubis Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) Bethe Center for Theoretical Physics Universität Bonn, Germany
More informationHadronic Inputs to the (g-2)µ Puzzle
Hadronic Inputs to the (g-2)µ Puzzle Christoph Florian Redmer 2nd International Workshop on High Intensity Electron Positron Accelerator at China Yanqihu Campus, UCAS (g-2)µ Magnetic moment of µ : Dirac
More informationReview of ISR physics at BABAR
Review of ISR physics at BABAR Konrad Griessinger on behalf of the BABAR Collaboration Institute for Nuclear Physics Mainz University Hadronic Physics with Lepton and Hadron Beams, Jefferson Lab, September
More informationScalar mesons at KLOE
Salvatore Fiore QCD08 - July 9 th 2008 Montpellier 1 Scalar mesons at KLOE Salvatore Fiore (on behalf of the KLOE collaboration) Sapienza Università di Roma and INFN Roma Talk outline DAFNE and KLOE Scalar
More informationGamma-Gamma Physics and Transition Form Factors with KLOE/KLOE-2
Gamma-Gamma Physics and Transition Form Factors with KLOE/KLOE- on behalf of the KLOE- Collaboration PhiPsi 017 June 6-9, 017 Mainz, Germany DAΦNE (Double Annular Φ Factory for Nice Experiments) + - e
More informationMEASUREMENT OF THE PROTON ELECTROMAGNETIC FORM FACTORS AT BABAR arxiv: v1 [hep-ex] 29 Nov 2013
MEASUREMENT OF THE PROTON ELECTROMAGNETIC FORM FACTORS AT BABAR arxiv:1311.7517v1 [hep-ex] 29 Nov 213 V. P. Druzhinin, on behalf of the BABAR Collaboration Budker Institute of Nuclear Physics SB RAS, Novosibirsk
More informationHadronic decays of the omega meson measured with WASA-at-COSY
Hadronic decays of the omega meson measured with WASA-at-COSY Department of Physics and Astronomy, Uppsala University, Lägerhyddsvägen 1, Uppsala, Sweden E-mail: lena.heijkenskjold@physics.uu.se In this
More informationUppsala University. October 16, Dark Forces at Accelerators, Frascati, Oct π 0 decays with WASA-at-COSY. Carl-Oscar Gullström
decays with decays with October 16, 2012 Dark Forces at Accelerators, Frascati, 16-19 Oct. 2011 Outline decays with 1 2 COSY 3 4 5 decays with Mass: 134.98 MeV /c 2 uū d d quark content: 2 Life time: 8.4
More informationJ PC =1 - - states spectroscopy, study of their decays Calculation of hadronic contributions into a µ and α QED (m Z )
Study of e + e - a n n i h i l a ti on a t l ow e n e r g i e s Vladimir D ru z h in in Budker I n s t i t ut e o f N uc l ea r P h y s i c s ( N o v o s i b i rs k R us s i a ) S N D - Ba Ba r L ep t
More informationPoS(DIS2017)184. η/η decays at BESIII. Isabella GARZIA Universitá degli studi di Ferrara and INFN-Sezione di Ferrara
Universitá degli studi di Ferrara and INFN-Sezione di Ferrara E-mail: garzia@fe.infn.it Decays of both η and η mesons provide an unique laboratory to study and understand low-energy QCD, and search for
More informationη and η physics at BESIII
η and η physics at BESIII Shuangshi Fang (for the BESIII Collaboration ) Institute of High Energy Physics MesonNet meeting June 17-19,2013, Prague, CZE OUTLINE Introduction η/η events at BESIII Recent
More informatione + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII
e + e results from BaBar, status of muon (g-2) prediction and τ mass measurement at BESIII (IHEP-LAL collaboration) Liangliang WANG Outline Introduction to hadronic vacuum polarization ee hadrons results
More informationExperimental Measurement of the Φ meson radiative decays into scalars and pseudoscalars mesons
Experimental Measurement of the Φ meson radiative decays into scalars and pseudoscalars mesons The KLOE Coll. presented by by Camilla Di Di Donato I.N.F.N. Naples International Conference on the Structure
More informationEffective field theory estimates of the hadronic contribution to g 2
Effective field theory estimates of the hadronic contribution to g 2 Fred Jegerlehner fjeger@physik.hu-berlin.de Work in collaboration with Maurice Benayoun et al EPJ C 72 (2012) 1848 and extension RMC
More informationBABAR Results on Hadronic Cross Sections with Initial State Radiation (ISR)
1 International Workshop on e+e- Collisions from Phi to Psi (PHIPSI08) Laboratori Nazionali di Frascati April 7-10, 2008 Results on Hadronic Cross Sections with Initial State Radiation (ISR) Johannes Gutenberg-Universität
More informationMeasurement of e + e hadrons cross sections at BABAR, and implications for the muon g 2
Measurement of e + e hadrons cross sections at BABAR, and implications for the muon g 2 Ray F. Cowan Representing the BABAR Collaboration Ft. Lauderdale, Florida USA 12 18 December 2013 Outline Introduction
More informationHADRONIC CROSS SECTION MEASUREMENTS AT SND
e + e Collisions from Phi to Psi 3 (PHIPSI3) International Journal of Modern Physics: Conference Series Vol. 3 () 6388 ( pages) c The Authors DOI:./S963883 HADRONIC CROSS SECTION MEASUREMENTS AT SND Int.
More informationMeasuring η π+ π- e+ e- with WASA at COSY. Daniel Coderre Hirschegg 2010
tglied der Helmholtz-Gemeinschaft Measuring η π+ π- e+ e- with WASA at COSY Daniel Coderre Hirschegg 2010 The WASA Detector ~20-170 Degrees ~3-18 Degrees - Internal experiment at COSY ring, Jülich, Germany
More informationarxiv: v2 [hep-ph] 27 Nov 2013
Eur. Phys. J. C manuscript No. (will be inserted by the editor) Dispersive analysis for γγ C. Hanhart a,,,3, A. Kupść b,4,5, U.-G. Meißner c,,,3,6,7, F. Stollenwerk d,,8, A. Wirzba e,,,3 arxiv:307.5654v
More informatione + e hadrons via ISR: light quarks spectroscopy
e + e hadrons via ISR: light quarks spectroscopy E. Solodov Budker INP, Novosibirsk, Russia (for BaBar collaboration) PhiPsi09, October 2009 Outline Short introduction Comparison with direct e + e Overview
More informationHadron Spectroscopy at BESIII
Available online at www.sciencedirect.com Nuclear and Particle Physics Proceedings 73 75 (16 1949 1954 www.elsevier.com/locate/nppp Hadron Spectroscopy at BESIII Shuangshi FANG (for the BESIII collaboration
More informationPoS(STORI11)050. The η π + π π 0 decay with WASA-at-COSY
The η π + π π 0 decay with WASA-at-COSY Institute for Physics and Astronomy, Uppsala University E-mail: patrik.adlarson@physics.uu.se Recently, a large statistics sample of approximately 3 10 7 decays
More informationNicolas Berger SLAC, Menlo Park, California, U.S.A.
SLAC-PUB-11414 August 25 Frascati Physics Series Vol. VVVVVV (xxxx), pp. - DAΦNE 24: Physics at meson factories Frascati, June. 7-11, 24 Selected Contribution in Plenary Session INCLUSIVE HADRONIC RESULTS
More informationCurrent status and results of the experiments at VEPP-2000
Current status and results of the experiments at VEPP-2000 Boris Shwartz, BINP, Novosibirsk, Introduction VEPP-2000 status Detectors Preliminary results 17.06.2013 MesonNet meeting, Prague, Czech Republic
More informationLepton universality test in the photoproduction of e - e + versus " - " + pairs on a proton target
2011-2014 PhD in theoretical physics under supervision of Prof. Dr. Marc Vanderhaeghen at Johannes Gutenberg University Mainz. Thesis title Light-by-light scattering and the muon s anomalous magnetic moment
More informationAndreas Nyffeler. Chiral Dynamics 2012, August 6-10, 2012 Jefferson Laboratory, Newport News, VA, USA
Hadronic light-by-light scattering in the muon g : impact of proposed measurements of the π 0 γγ decay width and the γ γ π 0 transition form factor with the KLOE- experiment Andreas Nyffeler Regional Centre
More informationOverview of Light-Hadron Spectroscopy and Exotics
Overview of Light-Hadron Spectroscopy and Eotics Stefan Wallner Institute for Hadronic Structure and Fundamental Symmetries - Technical University of Munich March 19, 018 HIEPA 018 E COMPASS 1 8 Introduction
More informationHIEPA2018, Beijing March 19-21, Two-photon Physics. Simon Eidelman
Two-photon Physics Simon Eidelman Budker Institute of Nuclear Physics SB RAS and Novosibirsk State University, Novosibirsk, Russia Outline 1. Belle results for e + e e + e X 2. Transition form factors
More informationτ η(η )2πν, 3πν and WZW anomaly
arxiv:hep-ph/97016v1 1 Feb 1997 τ η(η )πν, πν and WZW anomaly Bing An Li Department of Physics and Astronomy, University of Kentucky Lexington, KY 40506, USA Abstract The effects of the anomalous contact
More informationRecent Progress on Charmonium Decays at BESIII
Recent Progress on Charmonium Decays at BESIII Xiao-Rui Lu (on behalf of the BESIII Collaboration) Physics Department Graduate University of Chinese Academy of Sciences Beijing, 0049, China xiaorui@gucas.ac.cn
More informationPion Form Factor Measurement at BESIII
Pion Form Factor Measurement at BESIII Martin Ripka on behalf of the BESIII colaboration EINN - November, 2015 1 / 17 Motivation: Why Form Factor Measurements at BESIII? Muon anomalous magnetic moment
More informationand ' Time-like Transition Form Factors from MAMI
and ' Time-like Transition Form Factors from MAMI Institute for Nuclear Physics University Mainz Outline Experimental Setup Short Review of Time-like Transition Form Factors Time-like Transition Form Factor
More informationRecent Results on Rare B Decays from BaBar and Belle
SLACPUB-97 April 3 1 Recent Results on Rare B Decays from BaBar and Belle B. Brau a, a Laboratory for Nuclear Science, Massachusetts Institute of Technology 77 Massachusetts Avenue, Cambridge, MA, 2139
More informationDiscovery searches for light new physics with BaBar
SLAC-PUB-1548 Discovery searches for light new physics with BaBar Neus Lopez-March BABAR Collaboration E-mail: neus.lopezmarch@epfl.ch The BABAR experiment collected large samples of events during the
More informationF(q 2 ) 2. q 2. π - π + π -
è 1 Δ Δ π - F(q ) Δ Δ π - π + π - " "q m q 3 Δ Δ π - F(q ) Δ Δ π - π + π - " "q m q 4 5 γ dγ dq dγ = F(q ) dq pointlike 6 γ ( + P e e γ) dγ dq G. Landsberg, Phys.Rep. 18 (1985) 3 dγ = F(q ) dq pointlike
More informationCharmonium(-like) and Bottomonium(-like) States Results from Belle and BaBar
Charmonium(-like) and Bottomonium(-like) States Results from Belle and BaBar Mostly X(3872). Jens Sören Lange Justus-Liebig-Universität Gießen MENU10 12 th International Conference on Meson-Nucleon Physics
More informationη and η physics at BESIII
η and η physics at BESIII Shuangshi Fang (for the Collaboration ) Institute of High Energy Physics, Beijing Chiral Dynamics 2015 June 29-July 03,2015, Pisa, Italy OUTLINE Introduction η/η events at BESIII
More informationDifferent approaches to calculate the K ± π ± π 0 e + e decay width
Eur. Phys. J. C 014 74:860 DOI 10.1140/epjc/s1005-014-860-0 Regular Article - Theoretical Physics Different approaches to calculate the K ± ± 0 e + e decay width S. R. Gevorkyan a,m.h.misheva Joint Institute
More informationPhysics with Hadron Beams at COMPASS
Physics with Hadron Beams at COMPASS Bernhard Ketzer Technische Universität München MAMI and Beyond 2009 International Workshop on Hadron Structure and Spectroscopy 2009 30 March 2009 The Goal Understand
More informationThe Meson Decay Program at WASA-at-COSY. Daniel Coderre Light Meson Decays Workshop JLab, August 2012
Mitglied der Helmholtz-Gemeinschaft The Meson Decay Program at WASA-at-COSY Daniel Coderre Light Meson Decays Workshop JLab, August 2012 Scope of the WASA-at-COSY Meson Decay Program WASA-at-COSY η Decays
More informationSearches for Leptonic Decays of the B-meson at BaBar
Searches for Leptonic Decays of the B-meson at BaBar Stephen Jacob Sekula (MIT) on behalf of the BaBar collaboration Presented at Frontiers in Contemporary Physics III Vanderbilt University May 22-28,
More informationHadron physics at KLOE and KLOE-2
Hadron physics at KLOE and KLOE-2 (Universita La Sapienza e INFN Roma) for the KLOE / KLOE-2 Collaborations EPS HEP 2011 22 July 2011 Grenoble Outline DAΦNE KLOE / KLOE-2 Recent results on Hadron Physics:
More informationHLbl from a Dyson Schwinger Approach
HLbl from a Dyson Schwinger Approach Richard Williams KFUni Graz Tobias Göcke TU Darmstadt Christian Fischer Uni Gießen INT Workshop on Hadronic Light-by-Light contribution to the Muon Anomaly February
More informationStudy of e + e annihilation to hadrons at low energies at BABAR
Study of e + e annihilation to hadrons at low energies at BABAR V.Druzhinin Novosibirsk State University, BINP, Novosibirsk on behalf of the BABAR Collaboration International Symposium Advances in Dark
More informationRecent Results from the BESIII Experiment. Ryan Mitchell Indiana University Miami 2011 December 17, 2011
Recent Results from the BESIII Experiment Ryan Mitchell Indiana University Miami 11 December 17, 11 1 The primary goal of BESIII: Use e + e collisions to produce charmonium states, then use their properties
More informationMeson Decays with Crystal Ball at MAMI. Christoph Florian Redmer Institute for Nuclear Physics University Mainz 5th August 2012
Meson Decays with Crystal Ball at MAMI Institute for Nuclear Physics University Mainz 5th August 2012 Institute for Nuclear Physics in Mainz Ee-
More informationHadronic Contributions to
Hadronic Contributions to (g-) µ Yuping Guo INSTITUT FÜR KERNPHYSIK JOHANNES GUTENBERG-UNIVERSITÄT MAINZ New Vistas in Low-Energy Precision Physics Mainz, 4-7 April 016 Muon Anomaly: a µ = (g-) µ / Experimental:
More informationHadron Spectroscopy CLAS g12
Hadron Spectroscopy CLAS g12 D. P. Weygand High Energy (E γ > 4.4 GeV) Luminosity: 27 pb -1 Total Integrated Luminosity: 68 pb -1 Topics Meson Spectroscopy γp π + π + π (n) See C. Bookwalter γp ηπ ++ γp
More informationThe progress and prospect on charm mixing
BINP The progress and prospect on charm mixing Vitaly Vorobyev Budker Institute of Nuclear Physics and Novosibirsk State University On behalf of Belle & Belle II Collaborations 2 nd international workshop
More informationAxial anomaly, vector meson dominance and mixing
Axial anomaly, vector meson dominance and mixing Yaroslav Klopot 1, Armen Oganesian 1,2 and Oleg Teryaev 1 1 Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia
More informationJohan Bijnens. Lund University. bijnens bijnens/chpt.html
1/28 Lund University bijnens@thep.lu.se http://thep.lu.se/ bijnens http://thep.lu.se/ bijnens/chpt.html Workshop on at CLAS Jefferson Lab 5 August 2012 2/28 Outline 1 2 3 4 5 6 7 3/28 The big picture This
More informationMeasurements of e + e hadrons at VEPP-2M
Measurements of e + e hadrons at VEPP-2M B.Khazin Budker Institute of Nuclear Physics Novosibirsk Centerville, Cape Cod, MA 19-22 June 2006 Cross-section section e + e - hadrons VEPP-2M energy range :
More informationPrimEx Experiments and the Prospects of Rare η Decays at GlueX
PrimEx Experiments and the Prospects of Rare η Decays at GlueX Outline Liping Gan University of North Carolina Wilmington Challenges in Physics Precision tests of continuous symmetries of confinement QCD
More informationResults and prospects on hadronic cross section and γγ physics at KLOE/KLOE-2
Results and prospects on hadronic cross section and γγ physics at KLOE/KLOE-2 Giuseppe Mandaglio (for the KLOE2 Collaboration) Dipartimento di Fisica e di Scienze della Terra University of Messina INFN-
More informationStudy of the Electromagnetic Dalitz decay of J/ψ e + e - π 0
Study of the Electromagnetic Dalitz decay of J/ψ e + e - π 0 Vindhyawasini Prasad Email: vindy@ustc.edu.cn Department of Modern Physics University of Science & Technology of China Hefei City, Anhui Province,
More informationStrong and electromagnetic J/ψ and ψ(2s) decays into pion and kaon pairs *
CPC(HEP & NP), 010, 34(6): 1 5 Chinese Physics C Vol. 34, No. 6, Jun., 010 Strong and electromagnetic J/ψ and ψ(s) decays into pion and kaon pairs * Henryk Czyż 1;1) Agnieszka Grzelińska ;) 1 Institute
More informationη π 0 γγ decay in the three-flavor Nambu Jona-Lasinio model
TIT/HEP-38/NP INS-Rep.-3 η π 0 γγ decay in the three-flavor Nambu Jona-Lasinio model arxiv:hep-ph/96053v 8 Feb 996 Y.Nemoto, M.Oka Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 5,
More informationη and η physics at BESIII
η and η physics at BESIII Liqing Qin (for the BESIII Collaboration ) Shandong University Hadron 2013 Nov 4-8, 2013, Nara, JPN OUTLINE n Introduction n η/η events at BESIII n Recent results l η π+π-η l
More informationKLOE results on Scalar Mesons (II)
Euridice Meeting 17/9/2004 KLOE results on Scalar Mesons (II) C.Bini (Universita La Sapienza e INFN Roma) For the KLOE collaboration 1. Status of ηπ 0 γ analysis: 400 pb -1 sample 2. Search of the decay
More informationOverview and Status of Measurements of F 3π at COMPASS
g-2 workshop Mainz: Overview and Status of Measurements of F 3π at COMPASS D. Steffen on behalf of the COMPASS collaboration 19.06.2018 sponsored by: 2 Dominik Steffen g-2 workshop Mainz 19.06.2018 Contents
More informationCLEO Charmonium Results
CLEO Charmonium Results Hanna Mahlke Cornell University Ithaca, NY Quarkonium Working Group Meeting 10/17-20/07 DESY, Hamburg The Landscape All states below DD threshold observed 1-- states known best,
More informationRare Hadronic B Decays
XLI st Rencontres de Moriond QCD and High-Energy Hadronic Interactions La Thuile, Italy, March 18-5, 6 Rare Hadronic B Decays Jürgen Kroseberg Santa Cruz Institute for Particle Physics University of California,
More informationThe Radiative Return at Φ- and B-Meson Factories
The Radiative Return at Φ- and B-Meson Factories J.H. KÜHN INSTITUT FÜR THEORETISCHE TEILCHENPHYSIK KARLSRUHER INSTITUT FÜR TECHNOLOGIE I II Basic Idea Monte Carlo Generators: Status & Perspectives III
More informationRecent results and perspectives on pseudo-scalar mesons and form factors at BES III
Meson Physics in Low-Energy QCD Workshop on Meson Transition Form Factors Recent results and perspectives on pseudo-scalar mesons and form factors at BES III Elisabetta Prencipe Johannes Gutenberg University
More informationA. J. Schwartz Physics Department, University of Cincinnati, Cincinnati, Ohio USA
Physics Department, University of Cincinnati, Cincinnati, Ohio 51 USA E-mail: alan.j.schwartz@uc.edu (on behalf of the Belle II Collaboration) The Belle II experiment is under construction at the KEK laboratory
More informationExperimental meeting, BINP, Novosibirsk. Pseudoscalar mesons transition form factors (TFF) New study of e+e- e+e-η' in the double-tag mode at BABAR
Experimental meeting, BINP, Novosibirsk Pseudoscalar mesons transition form factors (TFF) New study of e+e- e+e-η' in the double-tag mode at BABAR (based on arxiv:1808.08038) Evgeny Kozyrev, Vladimir Druzhinin
More informatione + e hadrons in ISR and Two-photon reactions with BELLE and BABAR
e + e hadrons in ISR and Two-photon reactions with BELLE and BABAR Fabio Anulli INFN Sezione di Roma on behalf of the BABAR Collaboration Rencontres de Moriond QCD and High Energy Interactions 13 20 March,
More informationStudies of light mesons at BELLE
EPJ Web of Conferences 96, 8 ( 5) DOI:.5/ epjconf/ 59 68 C Owned by the authors, published by EDP Sciences, 5 Studies of light mesons at BELLE B.A.Shwartz,,a for the Belle collaboration Budker Institute
More informationErratum to: Measurement of φ meson parameters in K 0 LK 0 S decay mode with CMD-2 [Phys. Lett. B 466 (1999) ]
arxiv:hep-ex/99632v2 22 Jun 21 Erratum to: Measurement of φ meson parameters in K LK S decay mode with CMD-2 [Phys. Lett. B 466 (1999) 385 391.] R.R.Akhmetshin, E.V.Anashkin, M.Arpagaus, V.M.Aulchenko,
More informatione e with ISR and the Rb Scan at BaBar
e e with ISR and the Rb Scan at BaBar + + Francesco Renga Università di Roma La Sapienza & INFN Roma on behalf of the BaBar Collaboration 1 Introduction B Factories showed an exciting capability for improving
More informationThe Muon g 2 Challenging e+e and Tau Spectral Functions
γ The Muon g 2 Chenging e+e and Tau Spectral Functions Andreas Hoecker(*) (CERN) Moriond QCD and High Energy Interactions, La Thuile, Italy, 8 15 March, 2008 γ γ hadrons μ A. Hoecker: Muon g 2: Tau and
More informationHadronic Light-by-Light Scattering and Muon g 2: Dispersive Approach
Hadronic Light-by-Light Scattering and Muon g 2: Dispersive Approach Peter Stoffer in collaboration with G. Colangelo, M. Hoferichter and M. Procura JHEP 09 (2015) 074 [arxiv:1506.01386 [hep-ph]] JHEP
More informationStatus of KLOE and DAFNE
EtaMesonNet Meeting 14/10/2004 Status of KLOE and DAFNE Cesare Bini (Universita La Sapienza and INFN Roma) For the KLOE collaboration 1. Overview of physics at a φ - factory 2. The collider DAFNE 3. The
More informationStandard Model of Particle Physics SS 2013
Lecture: Standard Model of Particle Physics Heidelberg SS 2012 Experimental Tests of QED Part 2 1 Overview PART I Cross Sections and QED tests Accelerator Facilities + Experimental Results and Tests PART
More information! gluonic content from V"P! and J/"" VP decays
! gluonic content from V"P! and J/"" VP decays Rafel Escribano Grup de Física Teòrica & IFAE (UAB) EUROFLAVOUR 08 Annual Workshop and Mid-Term Review Meeting of September 23, 2008 IPPP, Durham (UK) Work
More informationIntroduction to the Standard Model. 1. e+e- annihilation and QCD. M. E. Peskin PiTP Summer School July 2005
Introduction to the Standard Model 1. e+e- annihilation and QCD M. E. Peskin PiTP Summer School July 2005 In these lectures, I will describe the phenomenology of the Standard Model of particle physics.
More informationTheory overview on rare eta decays
Theory overview on rare eta decays WASA Jose L. Goity Hampton/JLab BES III KLOE Hadronic Probes of Fundamental Symmetries Joint ACFI-Jefferson Lab Workshop March 6-8, 2014!UMass Amherst Motivation Main
More informationRecent results from SND detector
Recent results from SND detector Dmitry Shtol Budker Institute of Nuclear Physics, Novosibirsk State University, Novosibirsk, Russia HADRON-2015 13-19 September, 2015 VEPP-2000 e + e - collider center-of-mass
More informationCusp effects in meson decays
Cusp effects in meson decays Bastian Kubis Helmholtz-Institut für Strahlen- und Kernphysik (Theorie) Bethe Center for Theoretical Physics Universität Bonn, Germany Few-Body 2009 Bonn, 3/9/2009 B. Kubis,
More informationMeasurement of the π 0 Lifetime: QCD Axial Anomaly and Chiral Corrections. INT Sept, A.M. Bernstein MIT
Measurement of the π 0 Lifetime: QCD Axial Anomaly and Chiral Corrections INT Sept, 2009 A.M. Bernstein MIT spontaneous chiral symmetry breaking pions π 0 γ γ : axial anomaly, chiral corrections ~m d -m
More informationOpen problems in g-2 and related topics.
Open problems in g-2 and related topics. F. JEGERLEHNER DESY Zeuthen Humboldt-Universität zu Berlin Euridice Coll. Meeting, Feb 8-11, 2005, LNF, Frascati (Italy) supported by EU network EURIDICE Outline
More informationHadronic Decays of the ω Meson. Uppsala University
Hadronic Decays of the ω Meson Lena Heijkenskjöld Uppsala University L. Heijkenskjöld (Uppsala University) Hadronic Decays of the ω Meson / Standard Model Three fundamental forces Strong Weak Electro-
More information