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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

slide3

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

slide7

HERMES (L. Pappalardo)

DIS2006 Spin WG Summary

slide8

HERMES (L. Pappalardo)

DIS2006 Spin WG Summary

slide9

COMPASS (H. Fischer)

DIS2006 Spin WG Summary

slide10

COMPASS (H. Fischer)

DIS2006 Spin WG Summary

slide11

PHENIX (K. Tanida)

DIS2006 Spin WG Summary

slide12

PHENIX (K. Tanida)

DIS2006 Spin WG Summary

slide13

STAR (C. Gagliardi)

DIS2006 Spin WG Summary

slide14

STAR (C. Gagliardi)

DIS2006 Spin WG Summary

slide15

BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary

slide16

BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary

slide17

BRAHMS (J.H. Lee)

DIS2006 Spin WG Summary

slide19

RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary

slide20

RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary

slide21

RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary

slide22

RHIC polarimeter (A. Bravar)

DIS2006 Spin WG Summary

slide23

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

slide25

BELLE (R. Seidl)

DIS2006 Spin WG Summary

slide26

COMPASS (B. Grube)

DIS2006 Spin WG Summary

slide27

COMPASS (B. Grube)

DIS2006 Spin WG Summary

slide28

STAR (J. Kiryluk)

DIS2006 Spin WG Summary

slide29
DVCS
  • HERMES (Z. Ye)

DIS2006 Spin WG Summary

slide30

HERMES (Z. Ye)

DIS2006 Spin WG Summary

slide31

HERMES (Z. Ye)

DIS2006 Spin WG Summary

slide32
G
  • STAR (J. Kiryluk, F. Simon)
  • PHENIX (M. Liu, Y. Fukao)
  • COMPASS (K. Kurek)

DIS2006 Spin WG Summary

slide33

STAR (J. Kiryluk)

DIS2006 Spin WG Summary

slide34

PHENIX (Y. Fukao)

DIS2006 Spin WG Summary

slide35

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

slide37

PHENIX (M. Liu)

DIS2006 Spin WG Summary

slide38

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

slide40

COMPASS (M. Stolarski)

DIS2006 Spin WG Summary

slide41

JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary

slide42

JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary

slide43

JLAB CLAS (Y. Prok)

DIS2006 Spin WG Summary

slide44

JLAB Hall-A (N. Liyanage)

DIS2006 Spin WG Summary

slide45

JLAB Hall-A (N. Liyanage)

DIS2006 Spin WG Summary

slide46

JLAB Hall-C (S. Tajima)

DIS2006 Spin WG Summary

slide47

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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