Multi-quarkState,Glueball andHybridHadrons consist of 2 or 3 quarks:NaiveQuarkModel:Meson ( q q )Baryon (qqq)Newforms of hadrons:Multi-quarkstates:Numberofquarks>=4Hybrids : qqg, qqqg...Glueballs : gg. ggg...How quarks/gluons form a hadron is far from being well understood
Multi-quark State, Glueball and Hybrid ▪ Hadrons consist of 2 or 3 quarks： Naive Quark Model： ▪ New forms of hadrons: • Multi-quark states ：Number of quarks >＝ 4 • Hybrids ： qqg，qqqg . • Glueballs ： gg， ggg . Meson（ q q ） Baryon（q q q） How quarks/gluons form a hadron is far from being well understood
Light hadron physicsMotivation:GlueballspectrumfromLQcDEstablishspectrumoflighthadronsSearchfornon-conventional512hadrons0xUnderstandhowhadronsareformed2104Study chiral symmetry inQCD3*+38Why at atau-charm collider?0)23O- Gluonrich0L06O2++-Largerphasespacethan2at higher energies0+4Clean environment, JPcfilter2nacrone0ManyresultsinBESll:0~50publications++++adronsMuch more from BESIll:×100statistics,Y.Chenetal.,PRD73(2006)014516W-10resolution360narons6
Light hadron physics • Motivation: – Establish spectrum of light hadrons – Search for non-conventional hadrons – Understand how hadrons are formed – Study chiral symmetry in QCD • Why at a tau-charm collider ? – Gluon rich – Larger phase space than at higher energies – Clean environment, JPC filter Glueball spectrum from LQCD Y. Chen et al., PRD 73 (2006) 014516 Many results in BESII: ~ 50 publications Much more from BESIII: 100 statistics, 10 resolution
Main contents in the study of thehadronspectroscopy: New forms of hadrons(glueballs,hybridstates, multi-quark states): Baryon sectrum (qqq)
Main contents in the study of the hadron spectroscopy • New forms of hadrons（glueballs,hybrid states, multi-quark states） • Baryon sectrum (qqq)
Multi-guark states, glueballs and hybridshavebeensearchedforexperimentallyfora very long time, but none isestablished.Searches for new forms ofhadrons areof specialimportanceat BEssince J/psi decays are believed as an idealfactoryto searchandto studyexotichadrons. BES-lll can also play a veryimportant role in the study of excitednucleons and hyperons, i.e., the veryandpoorly understood N*,*++ resonances
Multi-quark states, glueballs and hybrids have been searched for experimentally for a very long time, but none is established.Searches for new forms of hadrons are of special importance at BES since J/psi decays are believed as an ideal factory to search and to study exotic hadrons. BES-III can also play a very important role in the study of excited nucleons and hyperons, i.e., the very poorly understood N*、 * 、 * 、 * and *++ resonances
LightHadronGroup-WindowsInternetExplorer口XXGooglePChttp://docbes3.ihep.ac.cn/lighthadron/index.php/Main.Page食收带夹CLight Hadron GroupLiaoyuan.Dong Mytalk Mypreferences My watchlist My contrbutians Log outLightHadronSpectroscopyWorkingGroupEdit History Delete Move Unprotect WatahPaceaiseussionMain MenuMain PageHomeconvenors:Xiaoyan ShenandAlexeyZhemchugoyMeetingsIf youare Interested ingetting involved ina newanalysis take a look at the list of analyses in.DatasetsprogressandcontacttheWokingGroup convenersformoreinfomation.Analyses&PeopleOngoing analysesPhysicsGoalseditPublicationsDocs&LinksThepurposeoftheLightHadronSpectroscopyGroupistoDocumentationcoordinatethephysics analysis inBEs-IlI related lightHadronCodeand Infosproductionanddecay,Specificitemsthatwill beincludedare:RecentTalks1.MesonSpectrosopyphysicsTools2.BaryonSpectrumUseful Links3.Physicsof softpionsandthelightest scalarsNavigation4.Two-photonPhysicsHelpFormoredetail,pleasechecktheChapter9-12ofPhysicsatRecent changesBES-III.SearchNewsedit1.FirstpaperfromLightHadronSpectroscopyGrouphasbeenpublishedSearchGCObservationofappmassthresholdenhancementin→J/y(J/→pp)decayarXiv:1001.5328,acceptedandtoappearinChinesePhysicsCWhat linla hereRatated thanges Upload file Specisi.pages printable vansion parmanent link