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Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV
Aggarwal, M. M.; Ahammed, Z.; Alakhverdyants, A. V.; Cai, X. Z.(蔡翔舟); Ma, G. L.(马国亮); Ma, Y. G.(马余刚); .; Wang, J. S.; Wang, X. L.; Zhang, J. B.; Zhang, W. M.; Zhang, X. P.; Zhang, Z. P.; Zhu, Y. H.; Zoulkarneev, R.; Zoulkarneeva, Y.
2011
Source PublicationPHYSICAL REVIEW LETTERS
ISSN0031-9007
Volume106Issue:6
AbstractWe report the first measurement of the parity-violating single-spin asymmetries for midrapidity decay positrons and electrons from W+ and W- boson production in longitudinally polarized proton-proton collisions at root s = 500 GeV by the STAR experiment at RHIC. The measured asymmetries, A(L)(W+) = -0.27 +/- 0.10(stat.) +/- 0.02(syst.) +/- 0.03(norm.) and A(L)(W-) = 0.14 +/- 0.19(stat.) +/- 0.02(syst.) +/- 0.01(norm.), are consistent with theory predictions, which are large and of opposite sign. These predictions are based on polarized quark and antiquark distribution functions constrained by polarized deep-inelastic scattering measurements.
Indexed BySCI
Language英语
Funding Project应物所项目组
WOS IDWOS:000287357100008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/9546
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Aggarwal, M. M.,Ahammed, Z.,Alakhverdyants, A. V.,et al. Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV[J]. PHYSICAL REVIEW LETTERS,2011,106(6).
APA Aggarwal, M. M..,Ahammed, Z..,Alakhverdyants, A. V..,Cai, X. Z..,Ma, G. L..,...&Zoulkarneeva, Y..(2011).Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV.PHYSICAL REVIEW LETTERS,106(6).
MLA Aggarwal, M. M.,et al."Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV".PHYSICAL REVIEW LETTERS 106.6(2011).
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