Measurement of parity-violating spin asymmetries in W± production at midrapidity in longitudinally polarized p+p collisions

Adare, A.

doi:10.1103/PhysRevD.93.051103

Title: Measurement of parity-violating spin asymmetries in $W^{\pm}$ production at midrapidity in longitudinally polarized $p + p$ collisions

Journal Article · Wed Mar 23 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.051103· OSTI ID:1324118

Adare, A. ^[1]

Univ. of Colorado, Boulder, CO (United States).et al

In this study, we present midrapidity measurements from the PHENIX experiment of large parity-violating single-spin asymmetries of high transverse momentum electrons and positrons from W^±/Z decays, produced in longitudinally polarized p + p collisions at center of mass energies of √s = 500 and 510 GeV. These asymmetries allow direct access to the antiquark polarized parton distribution functions due to the parity-violating nature of the W-boson coupling to quarks and antiquarks. The results presented are based on data collected in 2011, 2012, and 2013 with an integrated luminosity of 240 pb^–1, which exceeds previous PHENIX published results by a factor of more than 27. These high Q² data probe the parton structure of the proton at W mass scale and provide an important addition to our understanding of the antiquark parton helicity distribution functions at an intermediate Bjorken x value of roughly M_W/ √s = 0.16.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: PHENIX Collaboration

Grant/Contract Number:: AC05-00OR22725; SC00112704

OSTI ID:: 1324118

Alternate ID(s):: OSTI ID: 1243007; OSTI ID: 1335476

Report Number(s):: BNL-112149-2016-JA; KB0201022; ERKBP09

Journal Information:: Physical Review D, Vol. 93, Issue 5; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 22 works

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References (23)

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Updated lattice results for parton distributions Alexandrou, Constantia; Cichy, Krzysztof; Constantinou, Martha Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2017-09401	text	January 2017
The spin structure of the nucleon Kabuss, Eva-Maria Czechoslovak Journal of Physics, Vol. 55, Issue S1 https://doi.org/10.1007/bf03031986	journal	January 2005
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Pion Distribution Amplitude from Lattice QCD Zhang, Jian-Hui; Chen, Jiunn-Wei; Ji, Xiangdong arXiv https://doi.org/10.48550/arxiv.1702.00008	text	January 2017
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Figures / Tables (5)

Similar Records

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Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
midrapidity
spin asymmetries
Relativistic Heavy Ion Collider

Measurement of parity-violating spin asymmetries in W$^{\pm}$ production at midrapidity in longitudinally polarized $p$$+$$p$ collisions Adare, A.; Aidala, C.; Ajitanand, N. N. https://doi.org/10.17182/hepdata.73691 The current record is supplemented by this dataset	dataset	August 2016
Measurement of parity-violating spin asymmetries in W^± production at midrapidity in longitudinally polarized p+p collisions [Supplemental Data] https://doi.org/10.17182/hepdata.73691.v1 The current record is supplemented by this dataset	dataset	March 2016
"Table 1" of "Measurement of parity-violating spin asymmetries in W$^{\pm}$ production at midrapidity in longitudinally polarized $p$$+$$p$ collisions" Collaboration, Phenix https://doi.org/10.17182/hepdata.73691.v1/t1 The current record is supplemented by this dataset	dataset	January 2016

Title: Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p + p collisions

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Cited By (15)

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Title: Measurement of parity-violating spin asymmetries in $W^{\pm}$ production at midrapidity in longitudinally polarized $p + p$ collisions