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Hadron 2005 review

Hadron 2005 review. Rio De Janeiro Aug 05 21->26. http://www.cbpf.br/~hadron05/index.htm. By Su Houng Lee. Recent results from Jefferson Lab. g -exchange. Z-exchange. 2. +. e’. e’. e. e. Z. g. p. p. p. p. g. g. g. u. s. u. s. d. d. g g = +2/3. g g = –1/3.

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Hadron 2005 review

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  1. Hadron 2005 review Rio De Janeiro Aug 05 21->26 http://www.cbpf.br/~hadron05/index.htm By Su Houng Lee

  2. Recent results from Jefferson Lab g-exchange Z-exchange 2 + e’ e’ e e Z g p p p p g g g u s u s d d gg = +2/3 gg = –1/3 gg = –1/3 Z Z Z u u d s d s gZ = 1–8/3 sin2qw gZ = –1+4/3 sin2qw gZ = –1+4/3 sin2qw 1. Strange quarks in Nucleon: Happex

  3. Strange quark contribution to the proton

  4. e’ γv e D(1232) M1, E2, C2 N N 2. N-D transition form factors Preliminary E1+/M1+ is in good agreement with MAID, while S1+/M1+ continues to show strong Q2 dependence. Consistency between different data sets at low Q2 needs to be understood. Reanalysis of ELSA low Q2 points in progress.

  5. Relevant Publication CLAS(d) g2 2003 Phys. Rev. Lett. 91, 252001-1 SAPHIR 2003 Phys. Lett. B572, 127 NA49 2004 Phys. Rev. Lett. 92, 042003-1 CLAS(p) g6 2004 Phys. Rev. Lett. 92, 032001-1 3. Latest on Pentaquarks A comprehensive program to search for pentaquarks in photoproduction experiments at Jeffeson Lab were approved in 2003-2004 with the goal of confirming previous results and explore new kinematics with at leasta factor 10 increase in statistics. g10 deuteron Eg~ 1.0-3.5 GeV data taking completed in 2004 g11 proton Eg~ 1.6-3.8 GeV data taking completed in 2004 eg3 deuteron Eg~ 4.0-5.4 GeV data taking completed in 2005 Super-g proton Eg ~ 3.8 – 5.7 GeV planned for 2006

  6. Model-independent uppper limit 95% CL for Q+ is < 20nb. • With assumptions about the spectator, we can set a model-dependent upper limit to the cross section of <4-5 nb. preliminary M(nK+)(GeV)

  7. Still difference between LEPS and J-Lab exits in forward direction

  8. Charmed mesons spectroscopy chart SQ Sq L D1 Do* In the heavy-quark limit, the heavy-quark spin SQ and the total angular momentum of the light-quark jq=L+S are conserved PREDICTION #1: Each level is composed of a degenerate doublet of states with the same jq and total angular momentum J=jq± ½. jq=½ states are predicted to be broad (100-200MeV width). PREDICTION #2: FLAVOUR SYMMETRY THIS PARADIGMA FALSIFIED BY BABAR AND CLEO DISCOVERY OF Dsj STATES.

  9. Searches and measurements at • L=1 states at Focus (photoproduction at Tevatron) and Belle(B decay) and CDF • 2. D_s states at BABAR and Belle

  10. Hadronic Physics at Belle

  11. Hadronic Physics at BES

  12. Recent results on Baryon Spectroscopy Babar, Belle Selex

  13. Summary • Bound heavy pentaquark, unbound strange heavy pentaquarkCDF • Pentaquark search: forward direction • D states • Charomium states • 5. Charmed baryon state

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