真空和颗粒vacuum and particles.ppt

Charge Correlation in gg ? pp k+k- process Opp-sign combinations (PK-, PK+) Like-sign combinations (PK-, PK+) gg ? PP p+p- e+e- ? D*- D+ p+p- e+e- ? D*- D+ p+p- Opp-sign combinations (D*-p+, D+p-) Like-sign combinations (D*-p-, D+p+) gg ? PP p+p- e+e- ? D*- D+ p+p- e+e- ? g* ? Hadrons e+e- ?g e+e-?g g* ? g Hadrons e+e- ? QQ ? Hadrons ggg ? Hadrons ggg ? Hadrons e+e- ?e+e- gg ?e+e- Hadrons Heavy Ion Collision Au+Au ? ?? ? Hadrons Extra dimension? EM Strong Weak ? B or D meson decays (top?) Vacuum Two-Photon Annihilation Quarkonium Decay events W distribution of p0h W: invariant mass (p0h ) or Wgg CLEO_c -- DD (DD,DD*,DsDs) DD p Charm-Production in e+e- Annihilation around 4 GeV hep-ex/0710.0165 (CC) Energy level Energy Level DD threshold Meson (Quarkonium) X, Y, Z (Tetra Quark) D* p D Jets Formation Distance C C C C C C C C Meson immerges in Vacuum C C Y(4040) s s u u Y(4040) ? D*D*, DsDs 顏東茂 T.M. Yan Mix of energy levels width Cluster (Herwig/Weber) String (Pythia/LUND) gg ? f0(980) ? p+ p- ss or k+k- Virtual K+K- is needed p0 / r = (dd - uu) / 2? Time D+/D*+ = 0.36 ± 0.10 ± 0.20 PS/V ratio D+ meson fragmentation function (‘85) c-quark ? D-meson e+e- ? c c ? D + x V/PS Seuster ‘06 e+e- ? c c ? DD + X D X D L L Correlation (OPAL) LL LL LL LL Rapidity y = ? ln[ (E + p║) / (E - p║)] Short range correlation Long range correlation Belle data MC (phase) e+e- ? D*- D0 p+ (USTC) ? D* D**, D D** “Jet property” KT vs Rapidity 10 GeV e+e- ? c c events 真空如何產生粒子? g* ? q q g 無中生有 E = MC2 energy Vacuum fluctuations Space Time energy mass Meson immerges in Vacuum C C Y(4040) s s u u Y(4040) ? D*D*, DsDs Energy Level DD threshold Meson (Quarkonium) X, Y, Z (Tetra Quark) D* p