TY - JOUR
T1 - Measurement of the Transverse Single-Spin Asymmetry in p ↑+p →w± /Z0 at RHIC
AU - Adamczyk, L.
AU - Adkins, J. K.
AU - Agakishiev, G.
AU - Aggarwal, M. M.
AU - Kabana, S.
AU - STAR Collaboration
N1 - Publisher Copyright:
© 2016 American Physical Society.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - We present the measurement of the transverse single-spin asymmetry of weak boson production in transversely polarized proton-proton collisions at s=500 GeV by the STAR experiment at RHIC. The measured observable is sensitive to the Sivers function, one of the transverse-momentum-dependent parton distribution functions, which is predicted to have the opposite sign in proton-proton collisions from that observed in deep inelastic lepton-proton scattering. These data provide the first experimental investigation of the nonuniversality of the Sivers function, fundamental to our understanding of QCD.
AB - We present the measurement of the transverse single-spin asymmetry of weak boson production in transversely polarized proton-proton collisions at s=500 GeV by the STAR experiment at RHIC. The measured observable is sensitive to the Sivers function, one of the transverse-momentum-dependent parton distribution functions, which is predicted to have the opposite sign in proton-proton collisions from that observed in deep inelastic lepton-proton scattering. These data provide the first experimental investigation of the nonuniversality of the Sivers function, fundamental to our understanding of QCD.
UR - https://www.scopus.com/pages/publications/84963674111
U2 - 10.1103/PhysRevLett.116.132301
DO - 10.1103/PhysRevLett.116.132301
M3 - Article
AN - SCOPUS:84963674111
SN - 0031-9007
VL - 116
JO - Physical Review Letters
JF - Physical Review Letters
IS - 13
M1 - 132301
ER -