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

  • Adare, A.
  • Aidala, C.
  • Ajitanand, N. N.
  • Akiba, Y.
  • Akimoto, R.
  • ... Kim, Yong Kyun
  • 외 445명
Citations

WEB OF SCIENCE

33
Citations

SCOPUS

40

초록

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 root 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 Q(2) 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 / root s = 0.16.

키워드

MUON-PROTONDISTRIBUTIONSPHYSICSG1
제목
Measurement of parity-violating spin asymmetries in W-+/- production at midrapidity in longitudinally polarized p plus p collisions
저자
Adare, A.Aidala, C.Ajitanand, N. N.Akiba, Y.Akimoto, R.Alexander, J.Alfred, M.Aoki, K.Apadula, N.Aramaki, Y.Asano, H.Aschenauer, E. C.Atomssa, E. T.Awes, T. C.Azmoun, B.Babintsev, V.Bai, M.Bai, X.Bandara, N. S.Bannier, B.Barish, K. N.Bassalleck, B.Bathe, S.Baublis, V.Baumann, C.Baumgart, S.Bazilevsky, A.Beaumier, M.Beckman, S.Belmont, R.Berdnikov, A.Berdnikov, Y.Black, D.Blau, D. S.Bok, J. S.Boyle, K.Brooks, M. L.Bryslawskyj, J.Buesching, H.Bumazhnov, V.Butsyk, S.Campbell, S.Chen, C. -H.Chi, C. Y.Chiu, M.Choi, I. J.Choi, J. B.Choi, S.Choudhury, R. K.Christiansen, P.Chujo, T.Chvala, O.Cianciolo, V.Citron, Z.Cole, B. A.Connors, M.Cronin, N.Crossette, N.Csanad, M.Csorgo, T.Dairaku, S.Danley, T. W.Datta, A.Daugherity, M. S.David, G.DeBlasio, K.Dehmelt, K.Denisov, A.Deshpande, A.Desmond, E. J.Dietzsch, O.Ding, L.Dion, A.Diss, P. B.Do, J. H.Donadelli, M.D'Orazio, L.Drapier, O.Drees, A.Drees, K. A.Durham, J. M.Durum, A.Edwards, S.Efremenko, Y. 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L.Wysocki, M.Xia, B.Xue, L.Yalcin, S.Yamaguchi, Y. L.Yanovich, A.Ying, J.Yokkaichi, S.Yoo, J. H.Yoon, I.You, Z.Younus, I.Yu, H.Yushmanov, I. E.Zajc, W. A.Zelenski, A.Zhou, S.Zou, L.
DOI
10.1103/PhysRevD.93.051103
발행일
2016-03
유형
Article
저널명
Physical Review d
93
5
페이지
1 ~ 8

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