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High Energy Physics - Phenomenology

arXiv:hep-ph/0505127 (hep-ph)
[Submitted on 14 May 2005 (v1), last revised 13 Jul 2005 (this version, v2)]

Title:Parity-violating asymmetry of $W$ bosons produced in $p$-$p$ collisions

Authors:Xun Chen, Yajun Mao, Bo-Qiang Ma
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Abstract: The parity-violating asymmetry is an ideal tool to study the quark helicity distribution in the proton. We study the parity-violating asymmetry of $W^{\pm}$ bosons produced by longitudinally polarized $p$-$p$ collision in RHIC, based on predictions of quark distributions of the proton in the SU(6) quark-spectator-diquark model and a perturbative QCD based counting rule analysis. We find that the two models give nearly equal asymmetry for $W^+$ but that for $W^-$ quite different. Therefore future experiments on such quantity can help to clarify different predictions of the value $\Delta d(x)/d(x)$ at $x \to 1$ in the proton.
Comments: 11 Latex pages, 9 figures, final version to appear in NPA
Subjects: High Energy Physics - Phenomenology (hep-ph); High Energy Physics - Experiment (hep-ex); Nuclear Experiment (nucl-ex); Nuclear Theory (nucl-th)
Cite as: arXiv:hep-ph/0505127
  (or arXiv:hep-ph/0505127v2 for this version)
  https://doi.org/10.48550/arXiv.hep-ph/0505127
Journal reference: Nucl.Phys. A759 (2005) 188-197
Related DOI: https://doi.org/10.1016/j.nuclphysa.2005.05.146

Submission history

From: Bo-Qiang Ma [view email]
[v1] Sat, 14 May 2005 03:12:25 UTC (26 KB)
[v2] Wed, 13 Jul 2005 14:43:55 UTC (26 KB)
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