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Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at s =510 GeV

  • Author(s): Adam, J
  • Adamczyk, L
  • Adams, JR
  • Adkins, JK
  • Agakishiev, G
  • Aggarwal, MM
  • Ahammed, Z
  • Alekseev, I
  • Anderson, DM
  • Aoyama, R
  • Aparin, A
  • Arkhipkin, D
  • Aschenauer, EC
  • Ashraf, MU
  • Atetalla, F
  • Attri, A
  • Averichev, GS
  • Bairathi, V
  • Barish, K
  • Bassill, AJ
  • Behera, A
  • Bellwied, R
  • Bhasin, A
  • Bhati, AK
  • Bielcik, J
  • Bielcikova, J
  • Bland, LC
  • Bordyuzhin, IG
  • Brandenburg, JD
  • Brandin, AV
  • Brown, D
  • Bryslawskyj, J
  • Bunzarov, I
  • Butterworth, J
  • Caines, H
  • Calderón De La Barca Sánchez, M
  • Cebra, D
  • Chakaberia, I
  • Chaloupka, P
  • Chan, BK
  • Chang, FH
  • Chang, Z
  • Chankova-Bunzarova, N
  • Chatterjee, A
  • Chattopadhyay, S
  • Chen, JH
  • Chen, X
  • Cheng, J
  • Cherney, M
  • Christie, W
  • Contin, G
  • Crawford, HJ
  • Csanad, M
  • Das, S
  • Dedovich, TG
  • Deppner, IM
  • Derevschikov, AA
  • Didenko, L
  • Dilks, C
  • Dong, X
  • Drachenberg, JL
  • Dunlop, JC
  • Edmonds, T
  • Efimov, LG
  • Elsey, N
  • Engelage, J
  • Eppley, G
  • Esha, R
  • Esumi, S
  • Evdokimov, O
  • Ewigleben, J
  • Eyser, O
  • Fatemi, R
  • Fazio, S
  • Federic, P
  • Fedorisin, J
  • Feng, Y
  • Filip, P
  • Finch, E
  • Fisyak, Y
  • Flores, CE
  • Fulek, L
  • Gagliardi, CA
  • Galatyuk, T
  • Geurts, F
  • Gibson, A
  • Grosnick, D
  • Gunarathne, DS
  • Gupta, A
  • Guryn, W
  • Hamad, AI
  • Hamed, A
  • Harlenderova, A
  • Harris, JW
  • He, L
  • Heppelmann, S
  • Heppelmann, S
  • Herrmann, N
  • Holub, L
  • Hong, Y
  • et al.
Abstract

© 2019 authors. Published by the American Physical Society. We report new STAR measurements of the single-spin asymmetries AL for W+ and W- bosons produced in polarized proton-proton collisions at s=510 GeV as a function of the decay-positron and decay-electron pseudorapidity. The data were obtained in 2013 and correspond to an integrated luminosity of 250 pb-1. The results are combined with previous results obtained with 86 pb-1. A comparison with theoretical expectations based on polarized lepton-nucleon deep-inelastic scattering and prior polarized proton-proton data suggests a difference between the ū and d quark helicity distributions for 0.05

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