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Search for exotic hadrons with the PANDA detector

Search for exotic hadrons with the PANDA detector. Jan Kisiel Institute of Physics, University of Silesia Katowice, Poland (kisielj@us.edu.pl). Exotic hadrons:. Glueballs made entirely out of glue Hybrids pairs with an excited gluon

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Search for exotic hadrons with the PANDA detector

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  1. Search for exotic hadrons with the PANDA detector Jan Kisiel Institute of Physics, University of Silesia Katowice, Poland (kisielj@us.edu.pl) Polish-German Meeting, Warszawa, 24.11.2003

  2. Exotic hadrons: • Glueballs made entirely out of glue • Hybrids pairs with an excited gluon • Molecules pairs Polish-German Meeting, Warszawa, 24.11.2003

  3. molecules molecules hybrids hybrids glueballs light mesons charmonium Mass [GeV/ ] Mesons and exotics to be studied with the PANDA detector 0 2 4 6 8 10 12 15 [GeV/c] LEAR 1 2 4 6 5 3 Polish-German Meeting, Warszawa, 24.11.2003

  4. -- -+ 1 1 2 10 c c q q c i t t o h x g i E l c i 1 t o x E -2 10 0 2000 4000 MeV/ c 2 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, 24.11.2003

  5. Search for glueballs Glueball mass spectrum (LQCD) • glueballs bound gluon states • quantum numbers: • →exotic, JPC=2+-,1-+,0--,… • →„normal”, mixing with qq states • production cross section ~ μb • f0(1500) – candidate • →CB@LEAR • →mixed with scalar qq states Polish-German Meeting, Warszawa, 24.11.2003

  6. Crystal Barrel • f0(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, 24.11.2003

  7. Search for charmed hybrids -potential of excited gluon flux in addition to -potential for one-gluon exchange may lead to bound states. • LQCD predictions for charmed hybrids: • Mass: lowest state 4.2- 4.5GeV/c2 • Quantum numbers: ground state JPC=1-+ (exotic), but many allowed • Width: 5- 50MeV (narrow states) Polish-German Meeting, Warszawa, 24.11.2003

  8. Schematic view of PANDA detector on High Energy Storage Ring (HESR) Polish-German Meeting, Warszawa, 24.11.2003

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