Skip to main content
eScholarship
Open Access Publications from the University of California

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

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

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View