J-PARC一般化ー分布研究(可能性)

1、High Momentum Beamline at J-PARCShinya SawadaKEK (High Energy Accelerator Research Organization, Japan)Nov. 12, 20071Shinya Sawada RCNPIntroductionExamplesofExperimentsHigh MassDimuon (unpol)High MassDimuon (pol):Goto-sanPhi: YokkaichisanBeamlineOverviewandR&DNov. 12,20072Shinya Sawada RCNPSlow Extr

2、actionBeamline(Phase 1)NP-HALL56m(L)60m(W)50-GeVPST1Target30%LossBeam Dump750kWSwitchYardA-LineT0Target0.5% LossSplitPoint2%LossPlan to extendthehalldownstream (50m)inthePhase2.Nov. 12,20073Shinya Sawada RCNPBeamlinesatthe HadronHallNov. 12,20074Shinya Sawada RCNPWhat is theHigh Momentum Beamline?Pr

3、imary beams:proton(Phase 1),polarizedproton andheavyions (future) up to 51 GeV/c.Secondarybeams: proton,pion,kaon,etc.Theradiation shieldingoftheSYtunnel is designed so that2%(15kW) lossallowedatSM1.Exp. setup could be staged.120mNov. 12,20075Shinya Sawada RCNPHadronPhysicsBeamsofnotonlylowmomentumK

4、/piareindispensabletostudyQCDissues at J-PARC!Drell-Yan,J/Psiproduction structureatlargexp, KscatteringHypernucleiformationviap, KbeamsVectormesonmodification in matterChiralperturbationtheory viaK decaysSpectroscopywithpandKbeamsNov. 12,20076Shinya Sawada RCNPPhysics Possibilitiesofthe HighMomentum

5、BeamlineHadronPhysics PhysicsofQCDTwoMajorQuests of QCDquarkconfinementandchiralsymmetrybreakingSubjectsofHadronPhysics:attacking these questsfrom variousaspectsofview,atJ-PARC.Hadronspectroscopy:spectroscopywithpi/KMeson-baryondynamics: chiralperturbationvia Kdecays,Quarknuclear matterNuclear force

6、:pi/K scattering, hypernuclearformationvia pi/KNucleon structureExperimentstoexplore major hadronphysics questsarepossibleatthe highmomentumbeamline!vectormesonmodification in matterchiralsymmetryrestorationDrell-Yanand J/Psi productionnucleon structureatlargexNov. 12,20077Shinya Sawada RCNPExamples

7、ofExperimentsHigh MassDimuon Measurement1012/sprotonstalk by Goto-san forthepol.partVectorMesonModification in Nuclei109-1010/sprotonstalk by Yokkaichi-sanOtherPossibilitiesGPDwithpp ppiDelta?talk by Sudoh-sanattheAutumn JPSmeeting“J-PARC一般化化分布布研究（可能能性）軌道道角運動動量”Vectormesoninside nucleustalk by Ozawa

8、-sanHigh momentum kaon/pion?Nov. 12,20078Shinya Sawada RCNPP04: Measurement of High-MassDimuonProductionatthe50-GeV ProtonSynchrotronneeds30and50GeV,1012protons persec.Nov. 12,20079Shinya Sawada RCNPPhysics withHigh-MassDimuonsatJ-PARCNov. 12,200710Shinya Sawada RCNPDimuonSpectrometerfor FNALE605/77

9、2/789/866p +p(d)+-xat800GeV/cTwocomponentsinthe+-spectrum:(a)Continuum:Drell-Yan process(b)Vector mesons:J/,FNAL E866Nov. 12,200711Shinya Sawada RCNPNov. 12,200712Shinya Sawada RCNPNov. 12,200713Shinya Sawada RCNPQuarkEnergyLosswith D-Yat50GeVFractional energyloss is largerat50GeVPossibletotest thep

10、redictedL2-dependencefrom theA-dependencemeasurementGarveyand Peng, PRL90(2003)092302Nov. 12,200714Shinya Sawada RCNPIssuesraised by PACRelationwith Fermilab E906?50GeVprotonbeamisnotavailable.ShojiNagamiyasays thata50-GeVproton maybeavailablewithslow rampingevenwithout aflying-wheel generator,accor

11、ding to Prof. Yamazaki,theleader of theJ-PARCacceleratorgroup.What is astage-1approval?Nov. 12,200715Shinya Sawada RCNPStatusofFermilabE906ApprovedbyFermilabPACin2001ReviewedbyFermilabPACagaininOctober2006,andthe PACagainendorsedE906A technicalreviewofE906washeldatArgonne National LabinDecember2006I

12、nJune 2007, US DOE/OfficeofNuclearPhysics decidedtofundE906Constructionofthe coils fora newmagnetConstruction/refurbishing thehodoscopes andtrackingchambersConstructionand installationwill be completedbyFall of 2009E906 is scheduledtorunfor twoyearsin2009-2011Equipments would becomeavailableinlate20

13、11Nov. 12,200716Shinya Sawada RCNPTheoreticalConsideration by Yokoya-san“QCD correctiontothe Drell-Yanprocess at J-PARCenergy”H.Yokoya(Niigata)第回J-PARC高物理理月日KEK50GeV低Drell-Yan過程QCD表？pQCD予予測？Summary by Yokoya-san: Drell-Yanprocess at theJ-PARCenergy,QCDcorrectionisvery important,and higher-ordercorre

14、ctionsbeyondNLO mayberequired.Resummationstudies tellus, however, pQCDcorrectioncanbecontrolledbysumming thelargelogterms.Power-correctionsmust becomerelevant,and needs morestudies.UnpolarizedPDFs (sea-quark, gluon)isstillunknown,andhavetobemeasuredattheJ-PARC experiments.Nov. 12,200717Shinya Sawada

15、 RCNPE16: Electron pairspectrometertoexplore thechiralsymmetryinQCDstage-1 approvedneed 30 GeV,109 1010protons persec.SeeYokkaichistalk.Nov. 12,200718Shinya Sawada RCNPIntroductionExamplesofExperimentsHigh MassDimuon (unpol)BeamlineOverviewandR&DNov. 12,200719Shinya Sawada RCNPBeam LineConfiguration

16、& OpticsISecondaryBeams:Useathin (2%= 15kWloss)target at SM1Collect thematforwardanglesTransferthem for120mSchematicLayout aroundSM1:Shieldingofthe switchingyard hasbeen designed to accommodate theloss at SM1Nov. 12,200720Shinya Sawada RCNPBeam LineConfiguration& OpticsIIBeam Optics:apreliminarydesi

17、gnhas beenstudied.Example:10GeV/cparticlesBore radiusofthequadrupolemagnets is 10 cm or less.0.2msr%canbeachieved.Nov. 12,200721Shinya Sawada RCNPYieldEstimation (30GeV)30GeVprotons +2%losscoppertarget.Productionangleof4 degreeand(Dp/p)DW= 0.2msr%.Momentum(GeV/c)ds/dpdW(mb/sr/GeV/c)Yield at SM1(per

18、1014 protons)Yield at 120m(per 1014 protons)p+514003.7E72.4E7p+102101.1E78.9E6p-510002.6E71.7E7p-101306.7E65.4E6K+51303.3E61.3E5K+10281.4E62.8E5K-5611.6E66.4E4K-107.03.6E57.2E4pbar5112.8E52.8E5pbar101.15.7E45.7E4Even with30GeV protons, enoughintensitycan be obtained especiallyfor pions!Nov. 12,20072

19、2Shinya Sawada RCNPYieldEstimation (50GeV)50GeVprotons +2%losscoppertarget.Productionangleof4 degreeand(Dp/p)DW= 0.2msr%.Momentum(GeV/c)ds/dpdW(mb/sr/GeV/c)Yield at SM1(per 1014 protons)Yield at 120m(per 1014 protons)p+537009.5E76.2E7p+109304.7E73.8E7p-537009.5E76.2E7p-107003.6E72.9E7K+54401.1E74.4E

20、5K+101206.2E61.2E6K-52205.7E62.3E5K-10562.9E65.8E5pbar5531.4E61.4E6pbar10168.4E58.4E5Togetmoreintensityfor highermomentumbeams,extractionatmore forwardangles canbeconsidered.Nov. 12,200723Shinya Sawada RCNPBeam LineConfiguration& OpticsIIIPrimary Beams:Beam lineconfigurationisalmostthe sameasthe cas

21、efor thesecondarybeamsexcept forequipments at SM1.Inordertocutafraction(10to100 ppm)ofthe primarybeam,abeam stealercanbeused.1014primary protons 109-1010protonsFieldfree holeNov. 12,200724Shinya Sawada RCNPBeam LineConfiguration& OpticsIVInordertogetafew%oftheprimarybeam,anelectrostatic septumwill b

22、e used.1014primary protons 1012protonsHigh heatand radiationdeposit havetobetakenintoaccount.More R&Dworksshouldbenecessary to estimate thebeam lossand to finalize thedesign.Inordertogetafractionoftheprimarybeam,a systemwith abent crystalwouldbea goodcandidate.Nov. 12,200725Shinya Sawada RCNPR&Dfor

23、abentcrystal systemTest experimentatKEK-PS (12-GeVproton)ceramic plate(10 x10cm)CsI plate(5x2.5cm)goniometerbent crystalmain beamdeflected beamview from abovecrystaldeflectionangle12GeVprotons1012/s 107/sGrant-in-Aidfor anextstep R&Dofhigh-mombeamlineisbeingapplied:Bent crystal, ESS,CrystalpCsI plate20 cmCeramic plateAl plateGoniometer o Ceramic platesDistance 145cmNov. 12,200726Shinya Sawada RCNPCost &Schedule: MagnetsfromtheWorldTotalcost if constructed fromscratch:$5-8M?Wehave no budgetsofartoconstruct ahighmomentumbeam line.Butweare doing every efforttoconstructitwithas