Measurement of the Parity-Violating Longitudinal Single-Spin Asymmetry for W-+/- Boson Production in Polarized Proton-Proton Collisions at root s=500 GeV

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成果类型：

期刊论文

作者：

Aggarwal, M. M.*;Ahammed, Z.;Alakhverdyants, A. V.;Alekseev, I.;Alford, J.;...

通讯作者：

Aggarwal, M. M.

作者机构：

[Pruthi, N. K.; Bhati, A. K.; Aggarwal, M. M.] Panjab Univ, Chandigarh 160014, India.

[Underwood, D. G.; Krueger, K.; Bridgeman, A.; Spinka, H. M.] Argonne Natl Lab, Argonne, IL 60439 USA.

[Ullrich, T.; Pile, P.; Lamont, M. A. C.; LeVine, M. J.; Ljubicic, T.; Xu, Z.; Ogawa, A.; Ruan, L.; Tang, A. H.; Fine, V.; Fisyak, Y.; Videbk, F.; Beavis, D. R.; Lauret, J.; Bland, L. C.; Longacre, R. S.; Webb, J. C.; Sorensen, P.; Christie, W.; Arkhipkin, D.; Debbe, R. R.; Lebedev, A.; Burton, T. P.; Dunlop, J. C.; Gordon, A.; Landgraf, J. M.; Love, W. A.; Yip, K.; Didenko, L.; Guryn, W.; Van Buren, G.; Lee, J. H.] Brookhaven Natl Lab, Upton, NY 11973 USA.

[Perkins, C.; Crawford, H. J.; Engelage, J.; Judd, E. G.; Ng, M. J.] Univ Calif Berkeley, Berkeley, CA 94720 USA.

[Mall, O. I.; Draper, J. E.; Cebra, D.; Brovko, S. G.; Sangaline, E.; Reed, R.; de la Barca Sanchez, M. Calderon; Romero, J. L.; Salur, S.; Haag, B.; Liu, H.] Univ Calif Davis, Davis, CA 95616 USA.

通讯机构：

[Aggarwal, M. M.] P

Panjab Univ, Chandigarh 160014, India.

语种：

英文

期刊：

PHYSICAL REVIEW LETTERS

ISSN：

0031-9007

年：

2011

卷：

106

期：

页码：

062002

DOI：

10.1103/PhysRevLett.106.062002

基金类别：

RHIC Operations Group at BNL; RCF at BNL; NERSC Center at LBNL; Open Science Grid consortium; Offices of NP and HEP within the U.S. DOE Office of ScienceUnited States Department of Energy (DOE); U.S. NSFNational Science Foundation (NSF); Sloan FoundationAlfred P. Sloan Foundation; DFG "Origin and Structure of the Universe" of GermanyGerman Research Foundation (DFG); CNRS/IN2P3Centre National de la Recherche Scientifique (CNRS); FAPESP CNPq of Brazil; Ministry of Ed. and Sci. of the Russian Federation; NNSFC of ChinaNational Natural Science Foundation of China (NSFC); CAS of China; MoST of ChinaMinistry of Science and Technology, China; MoE of ChinaMinistry of Education, China; GA of the Czech Republic; MSMT of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic; FOM of the NetherlandsFOM (The Netherlands); NWO of the NetherlandsNetherlands Organization for Scientific Research (NWO); DAE of India; DST of India; CSIR of IndiaCouncil of Scientific & Industrial Research (CSIR) - India; Polish Ministry of Sci. and Higher Ed.; Korea Research FoundationKorea Research Foundation; Ministry of Sci., Ed. and Sports of the Rep. Of Croatia; RosAtom of Russia

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本校为其他机构

院系归属：

物理科学与技术学院

摘要：

We 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 √s=500GeV by the STAR experiment at RHIC. The measured asymmetries, ALW+=-0.27±0.10(stat.)±0.02(syst.) ±0.03(norm.) and ALW-=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...

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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

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