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Spin WG Summary - spin experiments -. DIS2006 in Tsukuba April 24, 2006 Yuji Goto (RIKEN/RBRC). Spin Puzzle.  : quark-spin contribution global analysis of DIS and SIDIS data flavor decomposition extension to low- Q 2 transversity G : gluon-spin contribution

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Spin wg summary spin experiments

Spin WG Summary- spin experiments -

DIS2006 in Tsukuba

April 24, 2006

Yuji Goto (RIKEN/RBRC)


Spin puzzle
Spin Puzzle

  • : quark-spin contribution

    • global analysis of DIS and SIDIS data

    • flavor decomposition

    • extension to low-Q2

    • transversity

  • G: gluon-spin contribution

  • L: orbital angular momentum (OAM)

    • DVCS

    • transverse spin asymmetries

    • Sivers function and Collins function

DIS2006 Spin WG Summary


P. Mulders

DIS2006 Spin WG Summary


Quark distribution functions and fragmentation functions
quark distribution functions and fragmentation functions

  • transversity distribution function

    • distribution of the transverse-spin of a parton inside the transversely polarized proton

  • Sivers distribution function

    • correlation between the transverse-spin of the proton and the transverse-momentum of an unpolarized parton inside the proton (pT2)

  • Collins fragmentation function

    • correlation between the transverse spin of a fragmenting quark and the transverse momentum of the outgoing hadron relative to the quark (kT2)

DIS2006 Spin WG Summary


Experimental talks
experimental talks

(Convenors: D. Ryckbosch and Y. Goto)

  • transverse spin asymmetries and transversity

    • HERMES (L. Pappalardo) COMPASS (H. Fischer)

    • RHIC PHENIX (K. Tanida) STAR (C. Gagliardi) BRAHMS (J.H. Lee) polarimeter (A. Bravar)

    • J-PARC & GSI (P. Lenisa)

  • polarized fragmentation functions

    • BELLE (R. Seidl)

    • COMPASS (B.Grube)

    • RHIC STAR (J. Kiryluk)

  • DVCS

    • HERMES (Z. Ye)

  • G

    • RHIC STAR (J. Kiryluk, F. Simon) PHENIX (M. Liu, Y. Fukao)

    • COMPASS (K. Kurek)

  • quark/antiquark flavor decomposition

    • RHIC PHENIX (M. Liu) STAR (F. Simon)

  • low-Q2 DIS

    • COMPASS (M. Stolarski)

    • JLAB CLAS (V. Dharmawardane, Y. Prok) Hall-A (N. Liyanage) Hall-C (S. Tajima)

DIS2006 Spin WG Summary


Transverse spin asymmetries and transversity
transverse spin asymmetries and transversity

  • HERMES (L. Pappalardo)

  • COMPASS (H. Fischer, B. Grube)

  • PHENIX (K. Tanida)

  • STAR (C. Gagliardi)

  • BRAHMS (J.H. Lee)

  • RHIC polarimeter (A. Bravar)

  • J-PARC & GSI (P. Lenisa)

DIS2006 Spin WG Summary


HERMES (L. Pappalardo)

DIS2006 Spin WG Summary


HERMES (L. Pappalardo)

DIS2006 Spin WG Summary


COMPASS (H. Fischer)

DIS2006 Spin WG Summary


COMPASS (H. Fischer)

DIS2006 Spin WG Summary


PHENIX (K. Tanida)

DIS2006 Spin WG Summary


PHENIX (K. Tanida)

DIS2006 Spin WG Summary


STAR (C. Gagliardi)

DIS2006 Spin WG Summary


STAR (C. Gagliardi)

DIS2006 Spin WG Summary


BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary


BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary


BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary



RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary


RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary


RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary


RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary


J-PARC & GSI (P. Lenisa)

DIS2006 Spin WG Summary


Polarized fragmentation functions
polarized fragmentation functions

  • BELLE (R. Seidl)

  • COMPASS (B. Grube)

  • STAR (J. Kiryluk)

DIS2006 Spin WG Summary


BELLE (R. Seidl)

DIS2006 Spin WG Summary


COMPASS (B. Grube)

DIS2006 Spin WG Summary


COMPASS (B. Grube)

DIS2006 Spin WG Summary


STAR (J. Kiryluk)

DIS2006 Spin WG Summary


DVCS

  • HERMES (Z. Ye)

DIS2006 Spin WG Summary


HERMES (Z. Ye)

DIS2006 Spin WG Summary


HERMES (Z. Ye)

DIS2006 Spin WG Summary


G

  • STAR (J. Kiryluk, F. Simon)

  • PHENIX (M. Liu, Y. Fukao)

  • COMPASS (K. Kurek)

DIS2006 Spin WG Summary


STAR (J. Kiryluk)

DIS2006 Spin WG Summary


PHENIX (Y. Fukao)

DIS2006 Spin WG Summary


COMPASS (K. Kurek)

DIS2006 Spin WG Summary


Quark antiquark flavor decomposition
quark/antiquark flavor decomposition

  • RHIC PHENIX (M. Liu)

  • STAR (F. Simon)

DIS2006 Spin WG Summary


PHENIX (M. Liu)

DIS2006 Spin WG Summary


STAR (F. Simon)

DIS2006 Spin WG Summary


Low q 2 dis
low-Q2 DIS

  • COMPASS (M. Stolarski)

  • JLAB CLAS (V. Dharmawardane, Y. Prok)

  • JLAB Hall-A (N. Liyanage)

  • JLAB Hall-C (S. Tajima)

DIS2006 Spin WG Summary


COMPASS (M. Stolarski)

DIS2006 Spin WG Summary


JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary


JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary


JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary


JLAB Hall-A (N. Liyanage)

DIS2006 Spin WG Summary


JLAB Hall-A (N. Liyanage)

DIS2006 Spin WG Summary


JLAB Hall-C (S. Tajima)

DIS2006 Spin WG Summary


JLAB Hall-C (S. Tajima)

DIS2006 Spin WG Summary


Summary
Summary

  • We are still accumulating data to understand the nucleon spin structure

    • 

      • W production data, low-Q2 data, …

    • G

      • RHIC, COMPASS

    • L (OAM)

      • transverse spin asymmetries from both lepton- scattering and hadron-scattering data

DIS2006 Spin WG Summary


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