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1、High Momentum Beamline at J-PARC,Shinya Sawada KEK (High Energy Accelerator Research Organization, Japan),Nov. 12, 2007,1,Shinya Sawada RCNP,Introduction Examples of Experiments High Mass Dimuon (unpol) High Mass Dimuon (pol): Goto-san Phi: Yokkaichisan Beamline Overview and R&D,Nov. 12, 2007,2,Shin
2、ya Sawada RCNP,Slow Extraction Beamline (Phase 1),NP-HALL 56m(L)60m(W),50-GeV PS,T1 Target 30% Loss,Beam Dump 750kW,Switch Yard,A-Line,T0 Target 0.5% Loss,Split Point 2% Loss,Plan to extend the hall downstream (50m) in the Phase 2.,Nov. 12, 2007,3,Shinya Sawada RCNP,Beamlines at the Hadron Hall,Nov.
3、 12, 2007,4,Shinya Sawada RCNP,What is the High Momentum Beamline?,Primary beams: proton (Phase 1), polarized proton and heavy ions (future) up to 51 GeV/c. Secondary beams: proton, pion, kaon, etc.,The radiation shielding of the SY tunnel is designed so that 2% (15kW) loss allowed at SM1.,Exp. setu
4、p could be staged.,120m,Nov. 12, 2007,5,Shinya Sawada RCNP,Hadron Physics,Beams of not only low momentum K/pi are indispensable to study QCD issues at J-PARC!,Drell-Yan, J/Psi production structure at large x,p, K scattering Hypernuclei formation via p, K beams,Vector meson modification in matter,Chi
5、ral perturbation theory via K decays,Spectroscopy with p and K beams,Nov. 12, 2007,6,Shinya Sawada RCNP,Physics Possibilities of the High Momentum Beamline,Hadron Physics Physics of QCD Two Major Quests of QCD quark confinement and chiral symmetry breaking Subjects of Hadron Physics: attacking these
6、 quests from various aspects of view, at J-PARC. Hadron spectroscopy: spectroscopy with pi/K Meson-baryon dynamics: chiral perturbation via K decays, Quark nuclear matter Nuclear force: pi/K scattering, hypernuclear formation via pi/K Nucleon structure Experiments to explore major hadron physics que
7、sts are possible at the high momentum beamline! vector meson modification in matter chiral symmetry restoration Drell-Yan and J/Psi production nucleon structure at large x,Nov. 12, 2007,7,Shinya Sawada RCNP,Examples of Experiments,High Mass Dimuon Measurement 1012/s protons talk by Goto-san for the
8、pol. part Vector Meson Modification in Nuclei 109-1010/s protons talk by Yokkaichi-san Other Possibilities GPD with pp p pi Delta ? talk by Sudoh-san at the Autumn JPS meeting “J-PARC一般化分布研究（可能性）軌道角運動量” Vector meson inside nucleus talk by Ozawa-san High momentum kaon/pion?,Nov. 12, 2007,8,Shinya Saw
9、ada RCNP,P04: Measurement of High-Mass Dimuon Production at the 50-GeV Proton Synchrotron,needs 30 and 50 GeV, 1012 protons per sec.,Nov. 12, 2007,9,Shinya Sawada RCNP,Physics with High-Mass Dimuons at J-PARC,Nov. 12, 2007,10,Shinya Sawada RCNP,Dimuon Spectrometer for FNAL E605/772/789/866,p + p(d)
10、+- x at 800 GeV/c,Two components in the +- spectrum:,(a) Continuum: Drell-Yan process,(b) Vector mesons: J/, ,FNAL E866,Nov. 12, 2007,11,Shinya Sawada RCNP,Nov. 12, 2007,12,Shinya Sawada RCNP,Nov. 12, 2007,13,Shinya Sawada RCNP,Quark Energy Loss with D-Y at 50 GeV,Fractional energy loss is larger at
11、 50 GeV,Possible to test the predicted L2-dependence from the A-dependence measurement,Garvey and Peng, PRL 90 (2003) 092302,Nov. 12, 2007,14,Shinya Sawada RCNP,Issues raised by PAC,Relation with Fermilab E906? 50GeV proton beam is not available. Shoji Nagamiya says that a 50-GeV proton may be avail
12、able with slow ramping even without a flying-wheel generator, according to Prof. Yamazaki, the leader of the J-PARC accelerator group. What is a stage-1 approval?,Nov. 12, 2007,15,Shinya Sawada RCNP,Status of Fermilab E906,Approved by Fermilab PAC in 2001 Reviewed by Fermilab PAC again in October 20
13、06, and the PAC again endorsed E906 A technical review of E906 was held at Argonne National Lab in December 2006 In June 2007, US DOE/Office of Nuclear Physics decided to fund E906 Construction of the coils for a new magnet Construction/refurbishing the hodoscopes and tracking chambers Construction
14、and installation will be completed by Fall of 2009 E906 is scheduled to run for two years in 2009-2011 Equipments would become available in late 2011,Nov. 12, 2007,16,Shinya Sawada RCNP,Theoretical Consideration by Yokoya-san,“QCD correction to the Drell-Yan process at J-PARC energy” H. Yokoya (Niig
15、ata) 第回J-PARC高物理 月日KEK 50GeV低Drell-Yan過程QCD表？ pQCD予測？ Summary by Yokoya-san: Drell-Yan process at the J-PARC energy, QCD correction is very important, and higher-order corrections beyond NLO may be required. Resummation studies tell us, however, pQCD correction can be controlled by summing the large
16、 log terms. Power-corrections must become relevant, and needs more studies. Unpolarized PDFs (sea-quark, gluon) is still unknown, and have to be measured at the J-PARC experiments.,Nov. 12, 2007,17,Shinya Sawada RCNP,E16: Electron pair spectrometer to explore the chiral symmetry in QCD,stage-1 approved need 30 GeV, 109 1010 protons per sec. See Yokkaichis talk.,Nov. 12, 2007,18,Shinya Sawada RCNP,Introduction Examples of Experiments High Mass Dimuon (unpol) Beamline Overview and R&D,Nov.
