Measurement of the Transverse Single-Spin Asymmetry in p ↑+p →w± /Z0 at RHIC

STAR Collaboration

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number132301
JournalPhysical Review Letters
Volume116
Issue number13
DOIs
StatePublished - Apr 1 2016

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asymmetry
protons
collisions
proton scattering
transverse momentum
partons
leptons
bosons
quantum chromodynamics
distribution functions

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Measurement of the Transverse Single-Spin Asymmetry in p ↑+p →w± /Z0 at RHIC. / STAR Collaboration.

In: Physical Review Letters, Vol. 116, No. 13, 132301, 01.04.2016.

Research output: Contribution to journalArticle

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abstract = "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.",
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AU - STAR Collaboration

AU - Adamczyk, L.

AU - Adkins, J. K.

AU - Agakishiev, G.

AU - Aggarwal, M. M.

AU - Ahammed, Z.

AU - Alekseev, I.

AU - Aparin, A.

AU - Arkhipkin, D.

AU - Aschenauer, E. C.

AU - Attri, A.

AU - Averichev, G. S.

AU - Bai, X.

AU - Bairathi, V.

AU - Banerjee, A.

AU - Bellwied, R.

AU - Bhasin, A.

AU - Bhati, A. K.

AU - Bhattarai, P.

AU - Bielcik, J.

AU - Bielcikova, J.

AU - Bland, L. C.

AU - Bordyuzhin, I. G.

AU - Bouchet, J.

AU - Brandenburg, J. D.

AU - Brandin, A. V.

AU - Bunzarov, I.

AU - Butterworth, J.

AU - Caines, H.

AU - Calderón De La Barca Sánchez, M.

AU - Campbell, J. M.

AU - Cebra, D.

AU - Chakaberia, I.

AU - Chaloupka, P.

AU - Chang, Z.

AU - Chattopadhyay, S.

AU - Chen, X.

AU - Chen, J. H.

AU - Cheng, J.

AU - Cherney, Michael G.

AU - Christie, W.

AU - Contin, G.

AU - Crawford, H. J.

AU - Das, S.

AU - De Silva, L. C.

AU - Debbe, R. R.

AU - Dedovich, T. G.

AU - Deng, J.

AU - Derevschikov, A. A.

AU - Di Ruzza, B.

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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.

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