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Published byCameron Carr Modified over 9 years ago
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CERN-07 SHLee 1 Heavy Exotic Particle Production from HIC at LHC Su Houng Lee Yonsei Univ., Korea with Shigehiro Yasui, Wei Liu, Che-Ming Ko
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CERN-07 SHLee 2 Scalar tetraquark (Jaffe 76)Recently observed heavy tetraquark? Search for H dibaryon Search for + pentaquark Not explicitly exotic Never found nor confirmed ?
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CERN-07 SHLee 3 All Constituent quark model + … suggest 1.Exotic (meson or bayon with anomalous quark number) will exist in QCD due to quark quark attraction 2. Exotics with heavy quarks will surely exist
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CERN-07 SHLee 4 Attractions in quark-antiquark vs. diquark One gluon exchange Lattice calculation Phenomenological fit of color spin interaction to hadron spectrum
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CERN-07 SHLee 5 Works very well with 3x C B = C M = 635 m u 2 uud Baryon Mass difference Meson Mass difference d u
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CERN-07 SHLee 6 Why there should be a heavy pentaquark For a Pentaquark s u d s u For a Nucleon and a Kaon s u d s u c For a charmed Pentaquark = -232 MeV For a Nucleon and a D-meson c = -240 MeV x m c
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CERN-07 SHLee 7 Tetraquark : 1 + For a Tetraquark s u d s For the K and K* meson s ud s c For doubly charmed tetraquark = -143 MeV c x m c 2 c c For the D and D* meson = -64 MeV x m c
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CERN-07 SHLee 8 Spin 1E tetraquark - E 2meson ud ss63 MeV ud cc-79 MeV ud bb-124 MeV Spin 0E tetraquark - E 2meson ud sc218 MeV ud sb165 MeV ud cb-21 MeV Parity +E Pentaquark - E meson+baryon ud ud s 141+ E L=1 MeV ud ud c -50 + E L=1 MeV ud ud b -114+ E L=1 MeV Parity -E Pentaquark - E meson+bayron ud us c198 MeV ud us c8 MeV ud ud b-56 MeV Tetraquarks Pentaquarks
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CERN-07 SHLee 9 Search for cs =(ud)(us) c pentaquark Previous search Fermilab (E791) cs K* K P Fermilab bound LHC (ALICE ) measure D 0 well cs D0D0 K Statistical model
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CERN-07 SHLee 10 Search for T cc =(ud)(cc) tetraquark No previous experiment was possible But will be possible at LHC (ALICE ): 100 cc pairs produced T cc D* K
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CERN-07 SHLee 11 Number produced at LHC from coalescence 1.T cc : RHIC=1x10 -4 LHC=0.07 2. cs : RHIC=1.3x10 -4 LHC=5x10 -3 3.LHC can be a very useful heavy exotic factory If found, it will be the first exotic ever, will tell us about QCD, q-q interaction and dense matter great step forward in QCD
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CERN-07 SHLee 12 Why there should be a heavy pentaquark For a Pentaquark s u d d u For a Nucleon and a Kaon s u d d u For a Nucleon and a D-meson c u d d u c For a charmed Pentaquark u d d u
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