We introduce an approach to extract the spin transfer to ∧ in polarized proton--proton collision, based on the relation between single spin asymmetry and the polarization of ∧ production. With 4×106 ∧ events simulated for a PHENIX detector system, DLL = 0.1598 \pm 0.0343$ is retrieved by the approach and it agrees very well with the input value of 0.1429. The approach is further tested and confirmed with `bunch shuffling' method for the simulated events as well as experimental events collected at PHENIX in 2003. It is concluded that one can correctly extract the spin transfer without detailed understanding of acceptance correction even if the correction is significantly large in PHENIX experiment by using the approach described here. The method can be generally used for spin transfer study.
We introduce an approach to extract the spin transfer to ∧ in polarized proton--proton collision, based on the relation between single spin asymmetry and the polarization of ∧ production. With 4×106 ∧ events simulated for a PHENIX detector system, DLL = 0.1598 \pm 0.0343$ is retrieved by the approach and it agrees very well with the input value of 0.1429. The approach is further tested and confirmed with `bunch shuffling' method for the simulated events as well as experimental events collected at PHENIX in 2003. It is concluded that one can correctly extract the spin transfer without detailed understanding of acceptance correction even if the correction is significantly large in PHENIX experiment by using the approach described here. The method can be generally used for spin transfer study.
(Spin dependence of cross sections; polarized beam experiments)
引用本文:
HAN Ran;YE Hong-Xue;LIANG Yu-Tie;MAO Ya-Jun. An Approach to Extract the Spin Transfer to ∧in Polarized Proton--Proton Collision[J]. 中国物理快报, 2008, 25(6): 1988-1991.
HAN Ran, YE Hong-Xue, LIANG Yu-Tie, MAO Ya-Jun. An Approach to Extract the Spin Transfer to ∧in Polarized Proton--Proton Collision. Chin. Phys. Lett., 2008, 25(6): 1988-1991.
[1] Liu C X and Liang Z T 2000 Phys. Rev. D 62094001 Liu C X, Xu Q H and Liang Z T 2001 Phys. Rev. D 64 073004 Xu Q H, Liu C X and Liang Z T 2002 Phys. Rev. D 65 114008 Liang Z T and Liu C X 2002 Phys. Rev. D 66057302 Dong H,Zhou J and Liang Z T 2005 Phys. Rev. D 72033006 [2]Buskulic D et al (ALEPH Collaboration) 1996 Phys.Lett. B 374 319 [3] Airapetian A et al (HERMES Collaboration) 2001 Phys.Rev. D 64 112005 Adams M R et al (E665 Collaboration) 2000 Eur. Phys.J. C 17 263 Sapozhnikov M G et al (COMPASS Collaboration) hep-ex/0503009 [4] Burkardt M and Jaffe R L 1996 Phys. Rev. Lett. 70 2537 Boros C and Liang Z T 1993 Phys. Rev. D 574491 de Florian D, Stratmann M and Vogelsang W 1998 Phys.Rev. Lett. 81 530 Ma B Q and Soffer J 1999 Phys. Rev. Lett. 822250 [5] Kotzinian A, Bravar A and von Harrach D 1998 Eur.Phys. J. C 2 329 Xu Q H, Liang Z T and Sichtermann E 2006 hep-ph/0511061 [6]Han R 2008 Riken Accl. Prog. Rep. (in press)
2008, Vol. 25 
