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Measurement of the Transverse Single-Spin Asymmetry in p↑+p→W±/Z0 at RHIC
- Adamczyk, L;
- Adkins, JK;
- Agakishiev, G;
- Aggarwal, MM;
- Ahammed, Z;
- Alekseev, I;
- Aparin, A;
- Arkhipkin, D;
- Aschenauer, EC;
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- Bland, LC;
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- Bunzarov, I;
- Butterworth, J;
- Caines, H;
- Calderón de la Barca Sánchez, M;
- Campbell, JM;
- Cebra, D;
- Chakaberia, I;
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- Chang, Z;
- Chattopadhyay, S;
- Chen, X;
- Chen, JH;
- Cheng, J;
- Cherney, M;
- Christie, W;
- Contin, G;
- Crawford, HJ;
- Das, S;
- De Silva, LC;
- Debbe, RR;
- Dedovich, TG;
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- di Ruzza, B;
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- Dilks, C;
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- Flores, CE;
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- Kraishan, AF;
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- Lamont, MAC;
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- Landry, KD;
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- Mondal, MM;
- Morozov, DA;
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- Vandenbroucke, M;
- Varma, R;
- Vasiliev, AN;
- Vertesi, R;
- Videbæk, F;
- Vokal, S;
- Voloshin, SA;
- Vossen, A;
- Wang, JS;
- Wang, Y;
- Wang, F;
- Wang, Y;
- Wang, H;
- Wang, G;
- Webb, JC;
- Webb, G;
- Wen, L;
- Westfall, GD;
- Wieman, H;
- Wissink, SW;
- Witt, R;
- Wu, Y;
- Xiao, ZG;
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- Zbroszczyk, H;
- Zha, W;
- Zhang, S;
- Zhang, Z;
- Zhang, S;
- Zhang, JB;
- Zhang, Y;
- Zhang, J;
- Zhang, J;
- Zhang, XP;
- Zhao, J;
- Zhong, C;
- Zhou, L;
- Zhu, X;
- Zoulkarneeva, Y;
- Zyzak, M
- et al.
Published Web Location
http://journals.aps.org/prl/pdf/10.1103/PhysRevLett.116.132301No data is associated with this publication.
Abstract
We present the measurement of the transverse single-spin asymmetry of weak boson production in transversely polarized proton-proton collisions at sqrt[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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