Hadron Experimental Facility at J PARC

Transcription

1 FB August, 2012 Hadron Experimental Facility at J PARC H. Noumi Research Center for Nuclear Physics Osaka University 1

2 FB August, 2012 Hadron Experimental Facility Contents: 1. Present at J PARC Hyperon resonance below KbarN threshold 2. Near Term A research project in the High momentum Beam Line 3. Future Extension 2

3 J-PARC Facility Materials and Life Science Experimental Facility Hadron Experimental Facility ADS: Nuclear Transmutation (Phase 2) 500m Neutrino to Kamiokande Linac (330m) 3 GeV Rapid Cycle Synch. (25 Hz, 1MW) 50 GeV Main Ring (0.75 MW) J-PARC = Japan Proton Accelerator Research Complex Joint Project between KEK and JAEA since

4 Pion Muon High Intensity Proton Beam at 3 GeV, 50 GeV Nuclear Target Kaon Neutrino Anti proton to SK Neutron 50 GeV PS Slow Extraction Feb, 2008 Hadron Experimental Hall 4

5 HADRON BEAM LINE FACILITY Slow Extraction (SX) Beam : Currently, the accelerator is operated at 30 GeV. 1st phase: A design goal is 9 A (270 kw, 3.4x1014 /6s spill) SX Beam: step by step operation to increase extracted power. ~6 kw (June, (June 2012) >10 kw in % Extraction efficiency is achieved! ~50 kw in The World Highest Score ~ kw For FX: >180kW has been achieved. 5

6 March 11,

7 All the damages of structures and equipments are repaired. All the magnets were realigned. Radiation shields were reconstructed. They did recover in 10 months! The beam has come back at the end of

8 Hadron Exp. Hall K m K1.8BR K0 T1 K1.1(u.c.) K1 1BR K1.1BR 30 GeV Proton Beam 56 m 8

9 Hadron Exp. Hall K1.8 K1.8BR K1.1 K1.1BR KL ~2 (#) (0~5) (0 5) Prod. angle 6 deg. 6 deg. +6 deg. +6 deg. +16 deg. Length K1.8BR 45.8 m 31.4 m 27.9 m 21.5 m 20.6 m Design Max. p (GeV/c) K1.8 Acceptance 1.5 msr % 2.0 msr % 1 msr*% 5.0 msr % 7.8 sr Separator Max. Field 6mx2 80 kv/cm 6m x 1 80 kv/cm 2mx2 50 kv/cm 2mx1 50 kv/cm ES1:50kV/cm ES2:40kV/cm ES1:50kV/cm Under Const n ES1:40kV/cm K ((1.8GeV/c)) 1.3E+6 ($) K ((1GeV/c)) K+ ( GeV/c)) ( Measured performance Kaon Intensity /1014 p proton on Pt 6cm 30 GeV Proton K/all Beam T1 K1 1BR K1.1BR K0 K1.1(u.c.) 8.1E+5 ($) Mass Slits was closed about half of designed. KL: 2.1E+7 1.6E (#) typical mean value 9

10 Hadron Exp. Hall High p COMET Coming in Near Future 10

11 Nuclear & Hadron Physics at J-PARC Stran ngen es ss Z High Density Nuclear Matter, Nucelar Force Hypernuclei, Hypernuclei, Hypernuclei N 6 He SKS d u s d u Pentaquark + Confinement K1.8 K 0 L 0 Quark Free quarks Origin of Mass Bound quarks Why are bound quarks heavier? Mass without Mass Puzzle K1.8BR KL K1.1 K-meson Implantation of Kaon and the nuclear shrinkage hi K Xray High Density Nuclear Matter, Nucelar Force Kaonic atom Kaonic nucleus T-Viola nucleus COMET Beam line -e conversion tion μ e - 11

12 Hadron/Nuclear Physics Strangeness Nuclear Physics Precision Spectroscopy of S= 1, 2 Hypernuclei hypernucleihypernuclei Hypernuclear ray spectroscopy, Atomic X ray Neutron rich hypernuclei, scattering Deeply Bound Kaonic Nuclear System 3 He(K,n) K pp, K He X ray, d( +,K + ) p Hadron Physics Hadron Spectroscopy, including Exotics Penta quark baryon (1405) via d(k,n) H dibaryon via (K,K + ) Mass modification of Vector Meson in Medium >e+e in A, Avia (p bar,), > 0 in A 12

13 Λ(1405) : J P = ½ -, I = 0, M (1405) < M K bar N, lightest in neg. parity baryons: one cannot easily explain its light mass KN(1432) -27 MeV 3q or not? A long standing argument 13

14 A part of recent arguments on (1405) ( ) PDG 2012 gives the mass of MeV, adopting two theoretical analyses by: Dalitz et al: IM Spec. in K p >, w/ M matrix Esmaili et al: IM Spec. of Stopped K on 4 He Two pole structure Chiral Unitary Model: D. Jido et al., NPA725(03)181 Evidence in K p >, Magas et al, PRL95(05) New Experimental data are coming: pp >pk + MM spec., Zychor et al, PLB660(08)167 > disputed by Geng et al, p >K + MM spec., M. Niiyama et al, PRC78(08) Y. Nakatsugawa, [parallel Ia, 20 th ] p >K + IM spec., K. Moriya et al, PTPS186(10)234 Data of different reactions are necessary to understand the dynamically generated state. 14

15 Λ(1405):S-wave K bar N πσ scattering below K bar N threshold d(k -,n) may enhance the S-wave scattering at n = 0 degree. *) J. Yamagata-Sekihara,T. Sekihara, and D. Jido *) p K =800 MeV/c K - d p dia.1:small t 2 K - n dia.2:dominant t 1 K - dia.3:interference d d n n p t 2 n t K - n p t 1 t 2 K 0 15 n

16 Λ(1405):S-wave K bar N πσ scattering below K bar N threshold d(k -,n) may enhance the S-wave scattering at n = 0 degree. *) J. Yamagata-Sekihara,T. Sekihara, and D. Jido *) p K =800 MeV/c K - d p dia.1:small t 2 K - n dia.2:dominant t 1 D. Jido et al, EPJA42( 09)257 K - dia.3:interference d d n n p t 2 n t <=> K. Miyagawa, and J. Haidenbauer, PRC85( 12)065201, [Parallel VII-a] K - n p t 1 t 2 K 0 16 n

17 Deeply Bound K - -Nucleus System? nucl U K MeV 0 K - + p 1 2 3r fm -50 (1405) E Γ K -27 MeV 40 MeV nucl U K MeV 0 K - + pp 1 2 3r fm H + K E -48 MeV K Γ 61MeV nucl U K MeV K He 1 2 3r fm 3 K H E -108 MeV K Γ 20 MeV Dote et al E15(Iwasaki et al.) E17(Hayano et al.) E27(Nagae et al.) Y. Akaishi & T. Yamazaki, Phys. Rev. C65 (2002) Y. Akaishi & T. Yamazaki, Phys. Lett. B535 (2002)

18 (1405) Spectroscopy via the (K -,n) reaction on Deuteron K d Missing Mass (Y*) Spectrum in d(k -,n) w/ Identifying the final state. Neutron counter Y* n π - Σ + decay mode CDS (Solenoid Field 0.5T) π 0 Σ 0 decay mode π + Σ - TOF~15m decay mode Beam Sweeper (Ushiwaka) K - Beam Spectrometer (K1.8BR-D5) p (BG) p 18

19 Related presentations: Tkd Tokuda, Search hf for K pp, [parallel IIa, l 20th] Inoue, (1405), poster [PS 17, 21th] Hashimoto, K He X ray, poster [PS 34, 21th] K1.8BR 19

20 A New Research Project at the High p Beam Line 20

21 High p/comet Beam Line High pbl will be constructed as a primary beam line for E16( mass modification in medium) by A branch line for 8 GeV primary beam (1kz pulsed) are also to be built for COMET (E21: e conversion). Budget request will be done at the highest priority from KEK/IPNS. e e + e e + nucleus μ e lepton flavours changes by one unit PRL98(07)

22 A new research project in High res., High p Beam Line at J PARC Proposed by RCNP, Osaka U. under the MOU on research cooperation between RCNP, IPNS/KEK, and the J PARC Center Role of RCNP Collect research ideas and collaborators Introduce new methods/techniques High resolution, high p SecondaryBeamLine Multi particle Spectrometer 22

23 High p Line for 2 ndary Beam To be constructed for a 30 GeV primary beam line (by FY2015) High intensity secondary beam(unseparated) ( ) can be delivered. 2 msr % 1.0 x GeV/c High resolution beam: p/p~0.1% Momentum dispersion and eliminate 2 nd order aberrations Charmed particles can be produced. Exp. TGT(FF) Collimator 15kW Loss Target Dispersive s e Focal Point(IF) (SM) p/p~0.1% 23

24 Possible Subjects Charmed Baryon Spectroscopy N*, N, Y* resonances via (,ρ), (,K*),,, J/ productions off N/A K K pp strongly interacting hadronic system S= 2, 33 baryon spectroscopy others 24

25 Hadron Spectroscopy py w/ charm In Heavy Quark (Q) sector, Bare Q is already good constituent. Q is expected to weakly couple to NG boson Non Relativistic treatment is valid. Color magnetic interaction be weaken by 1/m Q Expects Simpler Spectra Charmed baryon would provide good and unique opportunity to study dynamics of hadron constituents 25

26 Q may make qq correlation stand out in Qqq. Relative and CM motions of qq in excited states, SO 1 q q / ( M Q 2mq ) / 3M q 1 ( M Q m q ) 1/ 3 ( M ) c (1/2,1/2 Q mq 3/2,3/2,5/2 ) q q q G.S. mode qq motion mode qq motion q q Q Q q qq c (1/2,3/2 ) c (1/2,1/2 3/2,3/2,5/2 ) c (1/2,3/2 ) c (1/2+,3/2+) c (1/2+) Chiral partners of qq states (S P, A V) 26

27 C=1 Baryon Spectra QM prediction and Observed Statest Many States have yet to be observed. QM prediction (L.A. Copley et. al, PRD20 (1979) 768) Measured states (PDG, 2012 online)?? 5/2 + (3/2 ) (1/2 ) 1/2 +?? 3/2 + 1/ Bar ryon Mass s(gev/c 2 ) c c

28 Baryon Spectra upto ~1 GeV Excitation Energy (GeV/c 2 ) (GeV/c 2 ) c (2940)? D*N? 2.9 c(2800)?? c (2880) 5/2 + DN c (1690) 3/2 (1670) 1/2 (1600) ( ) 1/2 + c (2625) 3/2 (1520) 3/2 c (2595) 1/2 c 1/2 + c c (2520) 3/2 + c (2455) 1/2 + (1775) 5/2 (1750) ( ) 1/2 3/2 1/2 + (1405) 1/2 3/2 + 1/2 + 1/2 + Difference and Similarity in s and c sector are of interest 28

29 Hadron Cluster States near threshold Y. Yamaguchi, S. Ohkoda, S. Yasui, and A. Hosaka, PRD85, (2012) Qqqqq Hadron Cluster? X Y Z Z tetra quark candidates Hadron Cluster?: X, Y, Z, Z b tetra quark candidates, (1405), and Hoyle states in 12 C. 29

30 Missing Mass Spectroscopy by p(,d* ) Production Rate, as well as Mass and Width, gives valuable information i on the states Coupling of NDY Binary Reaction at High E is well c Coupling constant Form Factor (transition) Cross Section: <7nb@13 GeV/c (PRL55, 154(1985)) 10 4 ~ 5 of p >K, K described das quark planar diagram. * D p D reggeon Yc A.B. Kaidalov, ZPC12, 63(1982) Intense Beam at J PARC is indispensable Hz at 15 GeV/c pions 30

31 Conceptual Layout of Multi particle Spectrometer TOF wall ACC2 Soft DC BL>1.5Tm GeV/c DC 15 GeV/c Pion Beam GCC GCC p * 0 D Y c 0 D K SSD or BFT BFT Missing Mass Resolution ~ a few MeV (Kinematic correction) 31 DC DC TOP ACC1

32 D Cut Simulation D* Cut ~13 nb BG~5.1 nb/mev D 0 ~10 ev./day/nb D* C (No Kinematic Corr.) Sensitivity Improvement of x100 than previous exp. 32

33 Future Extension of Hadron Facility 33

34 Extension of Hadron Exp. Hall (in planning) increase of new physics opportunities w/ unique beam lines HIHR Separated Kaon Beam GeV/c Ultra High Int. pion Beam p/p~0.01% p/p E~200 kev A(,K+) by Momentum Matching Tech. K1.1 KL II T3 T2 T1 K10 Neutral Kaon Prod. at 5 deg. Separated Kaon/Pbar Beam p / up to 10 GeV/c Baryon Baryon interaction ( Baryon Baryon ( ray ray from Hyp.Nucl., Hyp Nucl YN scat., scat A) A) Hadron Property in Nuclear Medium ( Mag. Moment in A) Quark Gluon Dynamics in Hadron/Medium ( *, *, Exotics, D off A) Mechanism of Dynamical mass generation ( J, multi K in A) 34

35 Summary J PARC Hadron Facility provides opportunities to study Nuclear/Hadron Physics A new research projectat High resolution, high p BL is proposed under the MoU between RCNP, KEK/IPNS, and J PARC. It opens unique opportunities to study hadron physics. In particular, C=1 baryon excited state via the (, D* bar ) reaction Inert Heavy quark may direct unique quark dynamics, i.e. qq correlation, lti in a baryon. Extension of the Hadron Exp. Hall is planning : new physics opportunities w/ unique beam lines. 35

36 Thank you very much 36