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An Approach to Extract the Spin Transfer to ∧in Polarized Proton--Proton Collision |
| HAN Ran;YE Hong-Xue;LIANG Yu-Tie;MAO Ya-Jun |
| School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871 |
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| Cite this article: |
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HAN Ran, YE Hong-Xue, LIANG Yu-Tie et al 2008 Chin. Phys. Lett. 25 1988-1991 |
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Abstract 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.
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| Keywords:
13.88.+e
14.20.Jn
34.80.Nz
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Received: 15 April 2008
Published: 31 May 2008
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| PACS: |
13.88.+e
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(Polarization in interactions and scattering)
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14.20.Jn
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(Hyperons)
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34.80.Nz
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(Spin dependence of cross sections; polarized beam experiments)
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