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Adam, J, Adamczyk, L, Adams, JR, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Alekseev, I, Anderson, DM, Aoyama, R et al (show 344 more authors) , 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, Sanchez, M Calderon de la Barca, Cebra, D, Chakaberia, I, Chaloupka, P, Chan, BK, Chang, F-H, 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, Heppelmanna, S, Herrmann, N, Holub, L, Hong, Y, Horvat, S, Huang, B, Huang, HZ, Huang, SL, Huang, T, Huang, X, Humanic, TJ, Huo, P, Igo, G, Jacobs, WW, Jentsch, A, Jia, J, Jiang, K, Jowzaee, S, Ju, X, Judd, EG, Kabana, S, Kagamaster, S, Kalinkin, D, Kang, K, Kapukchyan, D, Kauder, K, Ke, HW, Keane, D, Kechechyan, A, Kelsey, M, Kikola, DP, Kim, C, Kinghorn, TA, Kisel, I, Kisiel, A, Kocan, M, Kochenda, L, Kosarzewski, LK, Kraishan, AF, Kramarik, L, Kravtsov, P, Krueger, K, Mudiyanselage, N Kulathunga, Kumar, L, Elayavalli, R Kunnawalkam, Kvapil, J, Kwasizur, JH, Lacey, R, Landgraf, JM, Lauret, J, Lebedev, A, Lednicky, R, Lee, JH, Li, C, Li, W, Lia, W, Li, X, Li, Y, Liang, Y, Licenik, R, Lidrych, J, Lin, T, Lipiec, A, Lisa, MA, Liu, F, Liu, H, Liu, P, Liua, P, Liu, X, Liu, Y, Liu, Z, Ljubicic, T, Llope, WJ, Lomnitz, M, Longacre, RS, Luo, S, Luo, X, Ma, GL, Ma, L, Ma, R, Ma, YG, Magdy, N, Majka, R, Mallick, D, Margetis, S, Markert, C, Matis, HS, Matonoha, O, Mazer, JA, Meehan, K, Mei, JC, Minaev, NG, Mioduszewski, S, Mishra, D, Mohanty, B, Mondal, MM, Mooney, I, Moravcova, Z, Morozov, DA, Nasim, Md, Nayak, K, Nelson, JM, Nemes, DB, Nie, M, Nigmatkulov, G, Niida, T, Nogach, LV, Nonaka, T, Odyniec, G, Ogawa, A, Oh, K, Oh, S, Okorokov, VA, Olvitt, D Jr, Page, BS, Pak, R, Panebratsev, Y, Pawlik, B, Pei, H, Perkins, C, Pinter, RL, Pluta, J, Porter, J, Posik, M, Pruthi, NK, Przybycien, M, Putschke, J, Quintero, A, Radhakrishnan, SK, Ramachandran, S, Ray, RL, Reed, R, Ritter, HG, Roberts, JB, Rogachevskiy, OV, Romero, JL, Ruan, L, Rusnak, J, Rusnakova, O, Sahoo, NR, Sahu, PK, Salur, S, Sandweiss, J, Schambach, J, Schmah, AM, Schmidke, WB, Schmitz, N, Schweid, BR, Seck, F, Seger, J, Sergeeva, M, Seto, R, Seyboth, P, Shah, N, Shahaliev, E, Shanmuganathan, PV, Shao, M, Shen, WQ, Shi, SS, Shou, QY, Sichtermann, EP, Siejka, S, Sikora, R, Simko, M, Singh, J, Singha, S, Smirnov, D, Smirnov, N, Solyst, W, Sorensen, P, Spinka, HM, Srivastava, B, Stanislaus, TDS, Stewart, DJ, Strikhanov, M, Stringfellow, B, Suaide, AAP, Sugiura, T, Sumbera, M, Summa, B, Sun, XM, Sun, Y, Suna, Y, Surrow, B, Svirida, DN, Szymanski, P, Tang, AH, Tang, Z, Taranenko, A, Tarnowsky, T, Thomas, JH, Timmins, AR, Todoroki, T, Tokarev, M, Tomkiel, CA, Trentalange, S, Tribble, RE, Tribedy, P, Tripathy, SK, Tsai, OD, Tu, B, Ullrich, T, Underwood, DG, Upsal, I, Van Buren, G, Vanek, J, Vasiliev, AN, Vassiliev, I, Videbaek, F, Vokal, S, Voloshin, SA, Vossen, A, Wang, F, Wang, G, Wang, P, Wang, Y, Wanga, Y, Webb, JC, Wen, L, Westfall, GD, Wieman, H, Wissink, SW, Witt, R, Wu, Y, Xiao, ZG, Xie, G, Xie, W, Xu, H, Xu, N, Xu, QH, Xu, YF, Xu, Z, Yang, C, Yang, Q, Yang, S, Yang, Y, Ye, Z, Yea, Z, Yi, L, Yip, K, Yoo, I-K, Zbroszczyk, H, Zha, W, Zhang, D, Zhang, J, Zhang, L, Zhang, S, Zhanga, S, Zhang, XP, Zhang, Y, Zhang, Z, Zhao, J, Zhong, C, Zhou, C, Zhu, X, Zhu, Z, Zurek, MK and Zyzak, M
(2019)
Measurement of the longitudinal spin asymmetries for weak boson production in proton-proton collisions at √<i>s</i>=510 GeV.
PHYSICAL REVIEW D, 99 (5).
051102-.
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Abstract
We report new STAR measurements of the single-spin asymmetries $A_L$ for
$W^+$ and $W^-$ bosons produced in polarized proton--proton collisions at
$\sqrt{s}$ = 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 $\bar{u}$ and $\bar{d}$
quark helicity distributions for $0.05 < x < 0.25$. In addition, we report new
results for the double-spin asymmetries $A_{LL}$ for $W^\pm$, as well as $A_L$
for $Z/\gamma^*$ production and subsequent decay into electron--positron pairs.
Dimensions
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