Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

(PHENIX Collaboration)

doi:10.1103/PhysRevD.93.051103

Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

(PHENIX Collaboration)

University of Colorado Boulder
Los Alamos National Laboratory
University of Michigan, Ann Arbor
Stony Brook University
RIKEN
Riken BNL Research Center
The University of Tokyo
Howard University
High Energy Accelerator Research Organization, Tsukuba
Iowa State University
Kyoto University
Brookhaven National Laboratory
Oak Ridge National Laboratory
Institute for High Energy Physics
China National Nuclear Corporation
University of Massachusetts
University of California at Riverside
University of New Mexico
City University of New York
RAS - Saint Petersburg Nuclear Physics Institute
Vanderbilt University
Peter the Great St. Petersburg Polytechnic University
Russian Research Centre Kurchatov Institute
New Mexico State University
Columbia University
University of Illinois at Urbana-Champaign
Jeonbuk National University
Seoul National University
Bhabha Atomic Research Centre
Muhlenberg College
Lund University
University of Tsukuba
Weizmann Institute of Science
Eotvos Lorand University
Hungarian Academy of Sciences
Ohio University
Abilene Christian University
Universidade de São Paulo
University of Maryland, College Park
Yonsei University
Sorbonne Université
Rikkyo University
Charles University
Florida State University
Nagasaki Institute of Applied Science
Czech Technical University in Prague
Banaras Hindu University
University of Tennessee, Knoxville
Lawrence Livermore National Laboratory
Augustana University
Georgia State University
Ewha Womans University
Japan Atomic Energy Agency
Hiroshima University
Korea University
University of Debrecen
Myongji University
Université Paris-Saclay
Hanyang University
University of Jyväskylä
University of Zagreb
Institute of Science Tokyo
Károly Róbert University College
RAS - Institute for Nuclear Research
Moscow Engineering Physics Institute
Université Blaise Pascal
Nara Women's University
Czech Academy of Sciences
Lahore University of Management Sciences
Peking University

Research output: Contribution to journal › Article › peer-review

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Abstract

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 MW/s=0.16.

Original language	English
Article number	051103
Journal	Physical Review D
Volume	93
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevD.93.051103
State	Published - Mar 23 2016
Externally published	Yes

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10.1103/PhysRevD.93.051103

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@article{bcc6ba85d69c476ba3461d0cd418bbe5,

title = "Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.",

abstract = "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 MW/s=0.16.",

author = "\{(PHENIX Collaboration)\} and A. Adare and C. Aidala and Ajitanand, \{N. N.\} and Y. Akiba and R. Akimoto and J. Alexander and M. Alfred and K. Aoki and N. Apadula and Y. Aramaki and H. Asano and Aschenauer, \{E. C.\} and Atomssa, \{E. T.\} and Awes, \{T. C.\} and B. Azmoun and V. Babintsev and M. Bai and X. Bai and Bandara, \{N. S.\} and B. Bannier and Barish, \{K. N.\} and B. Bassalleck and S. Bathe and V. Baublis and C. Baumann and S. Baumgart and A. Bazilevsky and M. Beaumier and S. Beckman and R. Belmont and A. Berdnikov and Y. Berdnikov and D. Black and Blau, \{D. S.\} and Bok, \{J. S.\} and K. Boyle and Brooks, \{M. L.\} and J. Bryslawskyj and H. Buesching and V. Bumazhnov and S. Butsyk and S. Campbell and Chen, \{C. H.\} and Chi, \{C. Y.\} and M. Chiu and Choi, \{I. J.\} and Choi, \{J. B.\} and S. Choi and Choudhury, \{R. K.\} and N. Crossette",

note = "Publisher Copyright: {\textcopyright} 2016 American Physical Society.",

year = "2016",

month = mar,

day = "23",

doi = "10.1103/PhysRevD.93.051103",

language = "English",

volume = "93",

journal = "Physical Review D",

issn = "2470-0010",

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T1 - Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

AU - (PHENIX Collaboration)

AU - Adare, A.

AU - Aidala, C.

AU - Ajitanand, N. N.

AU - Akiba, Y.

AU - Akimoto, R.

AU - Alexander, J.

AU - Alfred, M.

AU - Aoki, K.

AU - Apadula, N.

AU - Aramaki, Y.

AU - Asano, H.

AU - Aschenauer, E. C.

AU - Atomssa, E. T.

AU - Awes, T. C.

AU - Azmoun, B.

AU - Babintsev, V.

AU - Bai, M.

AU - Bai, X.

AU - Bandara, N. S.

AU - Bannier, B.

AU - Barish, K. N.

AU - Bassalleck, B.

AU - Bathe, S.

AU - Baublis, V.

AU - Baumann, C.

AU - Baumgart, S.

AU - Bazilevsky, A.

AU - Beaumier, M.

AU - Beckman, S.

AU - Belmont, R.

AU - Berdnikov, A.

AU - Berdnikov, Y.

AU - Black, D.

AU - Blau, D. S.

AU - Bok, J. S.

AU - Boyle, K.

AU - Brooks, M. L.

AU - Bryslawskyj, J.

AU - Buesching, H.

AU - Bumazhnov, V.

AU - Butsyk, S.

AU - Campbell, S.

AU - Chen, C. H.

AU - Chi, C. Y.

AU - Chiu, M.

AU - Choi, I. J.

AU - Choi, J. B.

AU - Choi, S.

AU - Choudhury, R. K.

AU - Crossette, N.

PY - 2016/3/23

Y1 - 2016/3/23

N2 - 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 MW/s=0.16.

AB - 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 MW/s=0.16.

UR - https://www.scopus.com/pages/publications/84962440767

U2 - 10.1103/PhysRevD.93.051103

DO - 10.1103/PhysRevD.93.051103

M3 - Article

AN - SCOPUS:84962440767

SN - 2470-0010

VL - 93

JO - Physical Review D

JF - Physical Review D

IS - 5

M1 - 051103

ER -

Measurement of parity-violating spin asymmetries in W ± production at midrapidity in longitudinally polarized p +p collisions MEASUREMENT of PARITY-VIOLATING SPIN ... A. ADARE et al.

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