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K. Ozawa (KEK) Slide 2 Di-quark 2013/10/30Hadron Experiment, K. Ozawa2 Slide 3 J-PARC (Japan Proton Accelerator Research Complex) Tokai, Japan 50 (30) GeV Synchrotron (15 A) 400 MeV Linac (350m) 3 GeV Synchrotron (333 A) Material and Biological Science Facility World-highest beam intensity : ~1 MW x10 of BNL-AGS, x100 of KEK-PS Neutrino Facility Hadron Hall 60m x 56m 2013/10/303Hadron Experiment, K. Ozawa Slide 4 Nuclear & Hadron Physics at J-PARC N Z , Hypernuclei , Hypernuclei Strangen ess 0 Hypernuclei -2 Proton Beam K1.8 KL K1.1BR High p (not yet) SKS K1.8BR K1.1 d u u d s Pentaquark + He 6 Free quarks Bound quarks Why are bound quarks haevier Quark Mass without Mass Puzzle Kaonic nucleus Kaonic atom ray Implantation of Kaon and the nuclear shrinkage K meson 2013/10/304Hadron Experiment, K. Ozawa Slide 5 KL K1.1BR North side South side High Momentum SKS K1.8BR 2013/10/30Hadron Experiment, K. Ozawa5 Slide 6 SKS Spectrometer Q10 Q11 Q12 Q13 D4 2013/10/30Hadron Experiment, K. Ozawa6 Slide 7 2013/10/30Hadron Experiment, K. Ozawa7 Slide 8 1 2013/10/30Hadron Experiment, K. Ozawa8 Slide 9 1 PRC 64 (2001) 044302 -> U = - 28 MeV (c.f. U N = -50 MeV) Pauli Blocking 2013/10/30Hadron Experiment, K. Ozawa9 Slide 10 PRC 64 (2001) 044302 -> U = - 28 MeV (c.f. U N = -50 MeV) Experimental input to models Schaffner-Bielich, NP A804 (2008). Baryon fraction in neutron star One example More experimental information on N, N, , N interactions are awaited. 2013/10/30Hadron Experiment, K. Ozawa10 Slide 11 Precise measurements of N (E13) spectroscopy for light hyper nuclear using (K -, - ) reaction at p K =1.5 (or 1.1) GeV/c. Physics: N interaction Charge symmetry breaking in N interaction 4 He : Large CSB is suggested sd-shell hypernuclei for A-dependence of N interaction 19 F : The first sd-shell hypernuclei Confirm N spin-dependent forces and study N- N coupling force 10 B and 11 B Physics: g-factor of in nucleus Spin-flip B(M1) measurement for g in a nucleus 7 Li : Least ambiguities and most reliable. Hyper Ball-J is almost ready and we will take the first experimental data soon. 2013/10/30Hadron Experiment, K. Ozawa11 Beam Slide 12 interaction (E07) At KEK-PS E373, there are ~ 700 stops and one NAGARA event is observed. B = 1.010.20 MeV for 6 He At J-PARC, S=-2 nuclear chart is studied by ~10 2 Z via 10 4 - -stopping events. B of several nuclides will provide definitive information on interaction and structure of S=-2 nuclei. 2013/10/30Hadron Experiment, K. Ozawa12 Experimental Method (Nuclear Emulsion) The experiment is under preparations and it will be performed in the end of this year or early next year. Slide 13 N interaction (E05) Discovery of -hyper nucleus using 12 C(K -,K + ) reaction 12 Be Missing mass spectroscopy High resolution Originally, 3 MeV(FWHM) 1.5 MeV will be achieved using a new spectrometer Experiment will start in 2015 and we can expect more than 200 events of -hyper nucleus Precise spectroscopy 2013/10/30Hadron Experiment, K. Ozawa13 Expected Spectrum (Will be improved using a new spectrometer) Slide 14 2013/10/30Hadron Experiment, K. Ozawa14 Slide 15 Example 2013/10/30Hadron Experiment, K. Ozawa15 Slide 16 N Scattering (E40) Differential cross section of p and p scattering with 100 times larger statistics Motivation: See quark-Pauli effect 2013/10/30Hadron Experiment, K. Ozawa16 meson exch quark + meson exch Evaluation of quark Pauli effect and understanding the origin of the hard core of the nuclear force + p (quark Pauli) Hyperon production 1.3 GeV/c +- p -> K + +- reaction +- track not directly measured Measure proton momentum vector -> kinematically complete New experimental techniques with MPPC and Fiber Tracker will be used Slide 17 KN, E15 17 Physics motivation Experimental setup Experimental scheme Experiment is on-going 2013/2/11J-PARC Future 2013, K. Ozawa Slide 18 Results of an engineering run XY planeYZ plane Liquid 4 He inside Target-image together with material around has been reconstructed by the CDS Charged particles from the target have been successfully identified by the CDS 18 p - invariant-mass spectra reconstructed by the CDS ~10,000 s have been accumulated 2013/10/30Hadron Experiment, K. Ozawa CDS and Liquid Helium target system successfully worked Ready to explore kaonic- nuclei @ K1.8BR Data Taking in this May! Slide 19 19 E27: Search for K pp bound state in the d( ,K )X reaction K pp is produced through * doorway in the d( ,K + ) reaction Semi-exclusive measurement by Range Counter Array (RCA) in order to suppress quasi-free B.G. K pp p 1, p 2 K pp p 1, ( ) p 2 d * K + p 1s, * , p 2 n p K - pp d * ++ K+K+ RCA K+K+ p 2013/10/30Hadron Experiment, K. Ozawa Missing mass d( +,K + ) [GeV/c 2 ] Mom proton >350MeV/c counts (/3M beam 10days ) Expected point by FINUDA, DISTO Data already collected and results will be reported soon. Slide 20 2013/10/30Hadron Experiment, K. Ozawa20 Slide 21 Mass [GeV] 2013/10/30Hadron Experiment, K. Ozawa21 NG J p =0 - M ~ 130 MeV/c 2 - Slide 22 2013/10/30 Hadron Experiment, K. Ozawa 22 Large overlap of wave function Sensitive to -nucleus strong interaction potential Measure binding energy can be converted to this b1 information Slide 23 Exp. Results 2013/10/30 Hadron Experiment, K. Ozawa 23 K. Suzuki et al., Phys. Rev. Let., 92(2004) 072302 bound state is observed in Sn(d, 3 He) pion transfer reaction at GSI. Reduction of the chiral order parameter, f* () 2 /f 2 =0.64 at the normal nuclear density ( = 0 ) is indicated. Experiment is continued at RIKEN and positive results are already obtained. Slide 24 Other Pseudo Scalar Meson: 2013/10/30Hadron Experiment, K. Ozawa LOI by K. Itahashi et. al Calc. by H. Nagahiro, D. Jido, S. Hirenzaki et. al Forward neutron is detected. missing mass distribution is measured. In addition, measurements of invariant mass of N* decay Simulation 24 Slide 25 Other Pseudo Scalar Meson: @ GSI 2013/10/30Hadron Experiment, K. Ozawa25 Reaction is similar with pionic atom experiment. Theoretical calculation by H. Nagahiro Slide 26 Weinberg type sum rule ALEPH, Phys. Rep. 421(2005) 191 2013/10/30Hadron Experiment, K. Ozawa26 Hatsuda, Koike and Lee, Nucl. Phys. B394 (1993) 221 Kapusta and Shuryak, Phys. Rev. D49 (1994) 4694 Slide 27 Example: sum rule e.g. Weinberg type QCD sum rule Hatsuda, Koike and Lee, Nucl. Phys. B394 (1993) 221 Kapusta and Shuryak, Phys. Rev. D49 (1994) 4694 2013/10/30 Hadron Experiment, K. Ozawa 27 ALEPH, Phys. Rep. 421(2005) 191 Slide 28 QCD sum rule QCD 2013/10/30Hadron Experiment, K. Ozawa28 Hatsuda and Lee, Phys. Rev. C46 (1992) R34 Slide 29 KEK-PS E325 18 , 1.8% - 4.3 MeV/c 2 e.g. Binding energy of N is 1.8 MeV (Phys. Rev. C 63(2001) 022201R) 2013/10/30Hadron Experiment, K. Ozawa29 Hatsuda and Lee, Phys. Rev. C46 (1992) R34 Hatsuda and Kunihiro, Nucl. Phys. B387 (1992) 715 Slide 30 KEK-PS E325 2013/10/30Hadron Experiment, K. Ozawa30 12 GeV proton induced. p+A + X Electrons from decays are detected. Target Carbon, Cupper 0.5% rad length KEK E325 Slide 31 Clear measurements of meson at KEK-PS. 2013/10/3031 R. Muto et al., PRL 98(2007) 042581 Indication of QCD-originated mass modification! Cu bound state? 2013/10/30 Hadron Experiment, K. Ozawa s s u u d K+ p u d s u s p -> K + pp -> 39 Mass shift of in nucleus can produce a bound state? Production Detection J. Yamagata-Sekihara, D. Cabrera, M. J. Vicednte-Vacas, S. Hirenzaki; 'Formation of mesic nuclei'; Progress of Theoretical Physics 124, 147-162 (2010). Slide 40 E26: Omega in nucleus 2013/10/3040 n A + n+X 00 Measurements of meson in nucleus Production of is also measured Focus on low momentum meson Construct Neutron counter Gamma Detector Beam Momentum is 2.0 GeV/c It can be done at K1.8 and also at new high momentum beam line Hadron Experiment, K. Ozawa H. Nagahiro et al, Calculation for 12 C( , n) 11 B Missing Mass (Bound state?) Invariant Mass Slide 41 2013/10/30Hadron Experiment, K. Ozawa41 Slide 42 1/2, 1/2 , S = 0 1/2, 1/2 , S = 0 I=1 3 , S = 0 1/2, 1/2 , S = 0 1/2, 1/2 , S = 0 I=1 3 , S = 0 + p, - p Particle Data Book, Phys. Let. B667(2008), 1 Baryon 2013/10/30Hadron Experiment, K. Ozawa42 Slide 43 E19:Penta quark - results 2010 data No peak of was observed. U.L. (90%CL) 0.26 b/sr (2 14) in 1.51 1.55GeV/c 2 U.L.(90%CL) of 0.72 MeV (1/2 + ) 3.1 MeV (1/2 ) Search for the + via the p+ - K - +X Reaction at 1.97GeV/c PRL 109 (2012) 132002 PRL published Updated data with higher beam momentum exists. See Dr. Narukis talk. 2013/10/3043Hadron Experiment, K. Ozawa Slide 44 H dibaryon search (E42) The observation of several double- hypernuclear events in nuclear emulsion suggests that the H-dibaryon is very closely bound or unbound relative to 2m . Some experimental results show an enhancement just above 2m mass (~ 2250 MeV/c 2 ). J.K. Ahn et al., PLB 444 (1998) 267 C.J. Yoon et al., PRC 75 (2007) 022201(R) Weakly-bound : H -> p Virtual state : threshold effect Precise measurements of and p productions in 12 C(K -, K + ) reactions are proposed. Forward K spectrometer and a time projection chamber around the target is used. 2013/10/30Hadron Experiment, K. Ozawa44 Expected spectrum for a virtual state Experimental setups Slide 45 Harmonic Oscillator Potential Coulomb Potential (Positronium) Charmonium c-c Martin and Shaw, Particle Physics q-q -a/r + br : a ln(br) 2013/10/30Hadron Experiment, K. Ozawa45 Slide 46 Diquarks Baryons Mesons L L M 2 (GeV 2 ) M 2 1.1L Baryons as well as Mesons seem to be well described by a Rotating String Configuration with a universal string tension. Slide 47 Emergent Diquarks Baryons as well as Mesons seem to be well described by a Rotating String Configuration with a universal string tension. diquark in low-lying modes qq q Slide 48 Heavy quark baryon When single quark picture is still a good picture, excited states are degenerated. If Cqq (q=u,d) system is considered as C and di-quark correlations, orbital motion of is lowered due to the collectivity of the di-quark motion. Spin correlations between light quarks give additional level separations. 2013/10/3048 : orbital motion : di-quark correlation Hadron Experiment, K. Ozawa Measurements of all levels are important Level pattern tell us: Mass of di-quark Strength of di-quark correlation Spin dependent correlation between light quarks Slide 49 Missing mass Spectroscopy Large Acceptance, Multi-Particle K, from D 0 decays Soft from D* - decays (Decay products from Y c *) High Resolution High Rate SFT/SSD op. >10M/spill at K1.8 2.3 Tm Dipole H 2 TGT Beam PID DC TOF PID DC High rate Trackers (Fiber, SSD) LAMPS Use forward D mesons production No Bias measurements up to 3GeV/c 2 of Charmed Baryon mass 2013/10/30Hadron Experiment, K. Ozawa49 Slide 50 Signal: 1 nb/Yc* :~1000 events BG: 1.8 mb (JAM) c 1/2 + c (2455) 1/2 + c (2520) 3/2 + c (2800) ? ? c (2595) 1/2 - c (2625) 3/2 - c (2880) 5/2 + c (2940) ? ? DN c (GeV/c 2 ) D*N 2.3 2.4 2.7 2.9 2.6 c 2.8 Expected Spectrum in the ( ,D* - ) reaction cc c (2455) c (2520) c (2625) c (2765) c (2880) c + 0.8GeV Missing Mass (GeV/c 2 ) c DND*N c (2595) c (2800) c (2940) Slide 51 Summary Several experiments are being performed and prepared at J-PARC to investigate hadron interactions, nuclear medium effects and internal structure of hadrons. Currently, strangeness nuclear physics and Kaon bound system are intensively studied. In near future, meson properties in nucleus and level structure of charmed baryons will be measured. 2013/10/3051Hadron Experiment, K. Ozawa