Ivo van Vulpen. April 2004 Ivo van Vulpen 1

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1 LSB LSP Calor Moriond Ivo van Vulpen April 2004 Ivo van Vulpen 1

2 Introduction: La Thuile Moriond (Electroweak) Real physics conference Perugia Calorimetry 2004 Real hardware conference. Disclaimer: Most of the sheets are taken directly from the talks given at Moriond. April 2004 Ivo van Vulpen 2

3 Small and very nice conference, but still: 90 talks! Experiment: EW results & precision measurements B-physics Searches and SUSY Discovery of new particles Dark matter Neutrinos top quark mass, g-2, s in 2 (θ w ) Babar & Bell + frustrating sheet Higgs at Tevatron Penta-quarks Discovery claim What is happening Theory: Large extra dimensions TALK why and how can we seen it April 2004 Ivo van Vulpen 3

4 top quark 8 sheets April 2004 Ivo van Vulpen 4

5 Top quark production production Final states q q g t t W b W b WWbb σ(tt) 8 pb W->qq (2/3) and lv (1/3) bb qqlv lepton + jets. Most sensitive bb qqqq bb lvlv Large QCD background Di-lepton. small statistics April 2004 Ivo van Vulpen 5

6 Tevatron run 2: CDF di-lepton 126/102 pb -1 Lepton + jets 6 events (0.5 background) 22 events (6 background) April 2004 Ivo van Vulpen 6

7 Tevatron run 2: D0 First we have something to say on our run 1 result. April 2004 Ivo van Vulpen 7

8 New D0 analysis technique: Compute event-by-event probability Match measured 4-momenta to expectations for signal (m top = 170,175,180 etc) and background. Tevatron run 1: D0 Use only 4 jet (clean) events (22 events instead of 77 previously) & all combinations Basically same as difference between: < > = i i 1 σ i 1 σ i m m 2 2 i instead of < m >= 1 n i m i Can it be so important?? YES!! April 2004 Ivo van Vulpen 8

9 Tevatron run 1: D0 wow!! Improvement in statistical error is roughly 1.5 (comparable to 2.4 times more data) SAME DATA D0 l+jets (old) (new) m top ± 5.6 (stat) ± 5.5 (syst) GeV = 91 events m top = 180.1± 3.6 (stat) ± 3.9 (syst) GeV 22 events M top moves up by 7 GeV!!! As if you had 2.4 times more data April 2004 Ivo van Vulpen 9

D0 lepton + jets Tevatron New top quark mass averages TEVATRON RUN1 (old) RUN1 (new) RUN2 (l+jets) m top = 174.3 ± m top = 178.0 ± + 4.

10 D0 lepton + jets Tevatron New top quark mass averages TEVATRON RUN1 (old) RUN1 (new) RUN2 (l+jets) m top = ± m top = ± mtop = ± 5.1GeV 4.3 GeV 6.2 GeV M top moves up by +4.7 GeV Influence on rest of EW physics results April 2004 Ivo van Vulpen 10

Another example: Influence new top mass on tan(β) exclusion region from LEP: In MSSM benchmarks: m top = 175 GeV Maximum m h : in the MSSM < 135 GeV ha Computation of m h -max: Loop corrections m 4

11 Another example: Influence new top mass on tan(β) exclusion region from LEP: In MSSM benchmarks: m top = 175 GeV Maximum m h : in the MSSM < 135 GeV ha Computation of m h -max: Loop corrections m 4 top FeynHiggs: higher order corr. -> m h 3 GeV m h -max benchmark scenario m top 5 GeV -> m h 5 GeV hz LEP-excluded tan(β) region will shrink LEP Scenario m h m A Excluded m h tan(β) M h -max >91.0 > < tan(β) < 2.4 April 2004 Ivo van Vulpen 11

12 Impact new top mass on the electroweak fit Example: W mass. contributions from: δ M W m 2 t ln( m h ) old m h new Old (new): m h = 96 (117) GeV m h < 219 (251) 95% CL April 2004 Ivo van Vulpen 12

13 Electroweak g-2 4 sheets April 2004 Ivo van Vulpen 13

14 Anomalous magnetic moment of the muon g-2 collaboration final results Compare to SM prediction: there is a 1.4/2.7 sigma deviation Depends on e+e- data or tau data April 2004 Ivo van Vulpen 14

15 Theoretical computation of a µ [(g-2)/2] part (1) (1) light by light scattering: theory! Tedious work. Done by 1 guy basically. Sign flip found in 2002 (PhD student from Marseille??) April 2004 Ivo van Vulpen 15

(2) Hadronic vacuum polarization: experiment (2 ways to extract it) 1 Cannot be calculated (1) CMD: e+e- results: (2) Tau decay Gives different e+e- -> hadrons Claim 0.

16 (2) Hadronic vacuum polarization: experiment (2 ways to extract it) 1 Cannot be calculated (1) CMD: e+e- results: (2) Tau decay Gives different e+e- -> hadrons Claim 0.6% uncertainty, but new rad corr shifted cross section by 3% Region < 1.8 GeV dominates They were alone (check needed) Now confirmed by KLOE (radiative events). Maybe BaBar and Cleo can do something as well April 2004 Ivo van Vulpen 16

17 FINAL April 2004 Ivo van Vulpen 17

18 Electroweak sin 2 θ w 4 sheets April 2004 Ivo van Vulpen 18

19 E = 48 GeV, Q 2 = 0.03 GeV 2 tree level: April 2004 Ivo van Vulpen 19

20 A PV = -160 ± 21 ± 17 Significance of parity nonconservation is 6.3 sigma!! Translate to sin 2 (θ w ) Still the old NuTeV discrepancy April 2004 Ivo van Vulpen 20

21 NuTeV: neutrino nucleus deep inelastic scattering probe strange sea v and anti-v beam clean events nucleus hadrons Measure sin 2 θ W through NC CC cross section ratio: April 2004 Ivo van Vulpen 21

22 Extracting sin 2 (θ W ) from DIS cross sections: R = 1 2 sin θ w + δ R Nuclear effects due to target corrections 2 More precise corrections: (1) Z protons and N neutrons (10 x experimental error) (2) QCD radiative corrections new δ(sin 2 (θ W )) = σ NuTeV (towards SM value) (3) Fermi-motion and nucleair binding effects from target new δ(sin 2 (θ W )) = σ NuTeV (towards SM value) NuTeV shifts towards SM value (almost 1 sigma)! April 2004 Ivo van Vulpen 22

23 B-physics Babar/Belle 4 sheets April 2004 Ivo van Vulpen 23

24 BABAR and Belle attacking the CKM matrix from all sides 2 odd things Do they agree on everything?? Are there anomalies left?? CP violation in B 0 ->π + π - Belle B->φK s 3.5 σ deviation from SM April 2004 Ivo van Vulpen 24

25 Belle B->φK s 3.5 σ deviation from SM Jeroen van Hunen (NIKHEF) Difference between J/ψK s and φk s 0 B B b d b d W W g c c s d B 0 φk s penguin diagram s s s d J/ ψ 0 K φ K sin(2β) sin(2β) NP contributions to B 0 φk s penguin can result in sin(2β) J/ψKs sin(2β) φks Babar : sin(2β) J/ψKs =0.73±0.06 : sin(2β) φks = 0.5±0.5 Belle : sin(2β) φks =-1.0±0.6 Old numbers Diff! Measured asymmetry 3.5 σ SM exp t decay time between tag-b and decay-b April 2004 Ivo van Vulpen 25

26 CP violation in B 0 ->π + π - Fit asymmetry to: A CP ππ ( t) A ( t)cos( m t) + S ( t)sin( m t) = ππ ππ For no B ±,B 0 and B 0 decays no CP violation is observed (except Belle in B 0 ->π + π - ) time time Excluded at 5.2 σ No CP violation SUMMARY (BABAR/Belle): doing well, some mysteries left. April 2004 Ivo van Vulpen 26

27 Most frustrating slide in the conference!! D0 Quite a few talks on theoretical aspects of rare B decays as well. April 2004 Ivo van Vulpen 27

28 Tevatron running & Higgs 1 sheet April 2004 Ivo van Vulpen 28

Nothing new on the Higgs front & SUSY searches (updates from HERA, LEP, Tevatron) Tevatron operation Higgs cross section exclusion Excluded cross section 2004 2003 2002 Factor 50 started

29 Nothing new on the Higgs front & SUSY searches (updates from HERA, LEP, Tevatron) Tevatron operation Higgs cross section exclusion Excluded cross section Factor 50 started bad, now ok Expected Higgs boson mass exclusion SM cross section Tevatron accelerator review: 4.4 fb -1 at FY 09 feasible 8.5 fb -1 at FY 09 very challenging April 2004 Ivo van Vulpen 29

30 Penta-quarks & other new patricles 4 sheets April 2004 Ivo van Vulpen 30

31 New particle New particles are discovered all the time: April 2004 Ivo van Vulpen 31

32 New particle charmonium Could have seen it in Run1 I guess. Now studying decay properties. Seems like charmonium state. April 2004 Ivo van Vulpen 32

33 Pentaquarks: θ + and Ξ -- K + n-invariant mass New particle Penta-quark P-wave Exp. Theory (3+2) m 1542 ± 5 θ ± 50 m -- Ξ 1862 ± ± 50 Trying to understand the structure April 2004 Ivo van Vulpen 33

34 New particle Penta-quark A 3 rd penta-quark?? (NA49) Ξ(1860) Not confirmed by CDF April 2004 Ivo van Vulpen 34

35 Extra dimensions 5 sheets April 2004 Ivo van Vulpen 35

36 Many theory talks on this subject, a hot topic e.g. Randall-Sundrum Models prior reality Apparently I was not the only one who was surprised! April 2004 Ivo van Vulpen 36

37 April 2004 Ivo van Vulpen 37

38 April 2004 Ivo van Vulpen 38

39 Depend on size dimension (like harmonic oscillator boundary conditions) Tevatron (direct) and LEP (indirect) April 2004 Ivo van Vulpen 39

40 April 2004 Ivo van Vulpen 40

41 Dark matter 11 sheets April 2004 Ivo van Vulpen 41

42 Dark matter/energy Dark matter halo around galaxies What is dark matter?? Axion WIMP (SUSY stable LSP, χ 10 ) Ω matter > Ω baryon --> Non baryonic dark matter Ω total > Ω matter --> Dark Energy April 2004 Ivo van Vulpen 42

43 Detecting WIMPS (1) Assume WIMP = SUSY stable LSP April 2004 Ivo van Vulpen 43

44 Detecting WIMPS (2) April 2004 Ivo van Vulpen 44

45 WIMPS Sensitive underground detectors, but need large (mass * exposure time) April 2004 Ivo van Vulpen 45

46 WIMPS DAMA & Edelweiss April 2004 Ivo van Vulpen 46

47 WIMPS DAMA at Moriond April 2004 Ivo van Vulpen 47

48 DAMA at Moriond DAMA at CALOR Talks from DAMA 95% the same: They see something!! April 2004 Ivo van Vulpen 48

49 April 2004 Ivo van Vulpen 49

50 EDELWEISS-I (Frejus, inonization-heat measurement, small) Plans: 10-6 pb (now), 10-8 (soon), (10 years) April 2004 Ivo van Vulpen 50

9T 100 times more a->γ conversions LHC magnet than any other experiment ±8 o, so

51 Axions can be produced in the sun. Interact with magnetic field ( B 2 L 2 ) and produce X-rays (a-> γ) L=10 m, B = 9T 100 times more a->γ conversions LHC magnet than any other experiment ±8 o, so shifts only at sunrise(set) X ray telescope. 2005: Probe higher axion masses (fill magnet with helium) April 2004 Ivo van Vulpen 51

Other underground experiments: proton decay Explore lifetimes > 10 35 years Ambitious:

52 Other underground experiments: proton decay Explore lifetimes > years Ambitious: 74 sheets in 30 minutes 100,000,000 kg liquid argon Rubbia April 2004 Ivo van Vulpen 52

53 Neutrinos 7 sheet April 2004 Ivo van Vulpen 53

54 April 2004 Ivo van Vulpen 54

How do we probe the neutrino sector of the SM: Mass eigenstates are mixture of flavour eigenstates (a la CKM matrix) ν flavour >= U PMNS ν mass > q flavour >= UCKM qmass > 2-3 mixing 1-3 mixing 1-2

55 How do we probe the neutrino sector of the SM: Mass eigenstates are mixture of flavour eigenstates (a la CKM matrix) ν flavour >= U PMNS ν mass > q flavour >= UCKM qmass > 2-3 mixing 1-3 mixing 1-2 mixing Atmospheric Superkamiokande Reactor (CHOOZ) If θ > CP-violation Solar (KAMLAND) MNS = Maki-Nakagawa-Sakata (m 23 ) 2 = 2-3 ev 2 (m 13 ) 2 =?? Θ 23 = 45 o (m 12 ) 2 = 5-7 ev 2 April 2004 Ivo van Vulpen 55

56 Do they really oscillate?? Super Kamiokande Is disappearance really caused by oscillations?? 3.5sigma disfavored 2 allowed regions are compatible April 2004 Ivo van Vulpen 56

57 Are there 3 families?? Sterile neutrinos Close to 4 σ KARMEN excludes part of it (confirmation needed): --> miniboone April 2004 Ivo van Vulpen 57

58 miniboone energy spectrum requires more precise cross section data Sensitivity n mu ->n e Use identical targets at HARP miniboone will cross-check LSND result Depends on Tevatron programme April 2004 Ivo van Vulpen 58

59 What about the absolute mass scale and hierarchy?? NEMO: We only know mass differences squared (m 2 ) m3 m2 m1 Klapdor-Kleingrothaus hep-ph/ m2 m1? m3 Neutrinoless double beta decay n -> p + e - + v Lepton number violation Radon down factor 10 April 2004 Ivo van Vulpen 59

60 I will leave CERN on the 1 st of June NL ciao

61 April 2004 Ivo van Vulpen 61

Searches at LEP. Ivo van Vulpen CERN. On behalf of the LEP collaborations. Moriond Electroweak 2004

Searches at LEP. Ivo van Vulpen CERN. On behalf of the LEP collaborations. Moriond Electroweak 2004 Searches at LEP Moriond Electroweak 2004 Ivo van Vulpen CERN On behalf of the LEP collaborations LEP and the LEP data LEP: e + e - collider at s m Z (LEP1) and s = 130-209 GeV (LEP2) Most results (95%