Polish-German Meeting, Warszawa, 24.11.2003 Search for exotic hadrons with the PANDA detector Jan Kisiel Institute of Physics, University of Silesia Katowice,

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Presentation transcript:

Polish-German Meeting, Warszawa, Search for exotic hadrons with the PANDA detector Jan Kisiel Institute of Physics, University of Silesia Katowice, Poland

Polish-German Meeting, Warszawa, Exotic hadrons: Glueballs made entirely out of glue Hybrids pairs with an excited gluon Molecules pairs

Polish-German Meeting, Warszawa, Mesons and exotics to be studied with the PANDA detector molecules hybrids glueballs light mesons charmonium LEAR [GeV/c] Mass [GeV/ ]

Polish-German Meeting, Warszawa, E x o t i c l i g h t q q E x o t i c c c MeV/c Exotic states mix with conventional states: difficulties in observation two possibilities look for states with quantum numbers not accesilble to conventional states. reduce mixing

Polish-German Meeting, Warszawa, Search for glueballs Glueball mass spectrum (LQCD) glueballs bound gluon states quantum numbers: →exotic, J PC =2 +-,1 -+,0 --,… →„normal”, mixing with qq states production cross section ~ μb f 0 (1500) – candidate →mixed with scalar qq states

Polish-German Meeting, Warszawa, Crystal Barrel f 0 (1500) data: high statistics, full solid angle, low threshold (~20 MeV) in EM calorimeter, kaons identification study of different decay channels (branching ratios) partial wave analysis (coupled channel analysis)

Polish-German Meeting, Warszawa, potential of excited gluon flux in addition to -potential for one-gluon exchange may lead to bound states. Search for charmed hybrids LQCD predictions for charmed hybrids: Mass: lowest state GeV/c 2 Quantum numbers: ground state J PC =1 -+ (exotic), but many allowed Width: 5- 50MeV (narrow states)

Polish-German Meeting, Warszawa, Schematic view of PANDA detector on High Energy Storage Ring (HESR)