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Adamczyk, L, Adams, JR, Adkins, JK, Agakishiev, G, Aggarwal, MM, Ahammed, Z, Ajitanand, NN, Alekseev, I, Anderson, DM, Aoyama, R et al (show 340 more authors) , Aparin, A, Arkhipkin, D, Aschenauer, EC, Ashraf, MU, Attri, A, Averichev, GS, Bai, X, Bairathi, V, Barish, K, Behera, A, Bellwied, R, Bhasin, A, Bhati, AK, Bhattarai, P, Bielcik, J, Bielcikova, J, Bland, LC, Bordyuzhin, IG, Bouchet, J, Brandenburg, JD, Brandin, AV, Brown, D, Bryslawskyj, J, Bunzarov, I, Butterworth, J, Caines, H, Sanchez, M Calderon de la Barca, Campbell, JM, Cebra, D, Chakaberia, I, Chaloupka, P, Chang, Z, Chankova-Bunzarova, N, Chatterjee, A, Chattopadhyay, S, Chen, X, Chen, X, Chen, JH, Cheng, J, Cherney, M, Christie, W, Contin, G, Crawford, HJ, Das, S, Dedovich, TG, Deng, J, Deppner, IM, Derevschikov, AA, Didenko, L, Dilks, C, Dong, X, Drachenberg, JL, Draper, JE, Dunlop, JC, Efimov, LG, Elsey, N, Engelage, J, Eppley, G, Esha, R, Esumi, S, Evdokimov, O, Ewigleben, J, Eyser, O, Fatemi, R, Fazio, S, Federic, P, Federicova, P, Fedorisin, J, Feng, Z, Filip, P, Finch, E, Fisyak, Y, Flores, CE, Fujita, J, Fulek, L, Gagliardi, CA, Geurts, F, Gibson, A, Girard, M, Grosnick, D, Gunarathne, DS, Guo, Y, Gupta, A, Guryn, W, Hamad, AI, Hamed, A, Harlenderova, A, Harris, JW, He, L, Heppelmann, S, Heppelmann, S, Herrmann, N, Hirsch, A, Horvat, S, Huang, B, Huang, T, Huang, X, Huang, HZ, Humanic, TJ, Huo, P, Igo, G, Jacobs, WW, Jentsch, A, Jia, J, Jiang, K, Jowzaee, S, Judd, EG, Kabana, S, Kalinkin, D, Kang, K, Kapukchyan, D, Kauder, K, Ke, HW, Keane, D, Kechechyan, A, Khan, Z, Kikola, DP, Kim, C, Kisel, I, Kisiel, A, Kochenda, L, Kocmanek, M, Kollegger, T, Kosarzewski, LK, Kraishan, AF, Krauth, L, Kravtsov, P, Krueger, K, Kulathunga, N, Kumar, L, Kvapil, J, Kwasizur, JH, Lacey, R, Landgraf, JM, Landry, KD, Lauret, J, Lebedev, A, Lednicky, R, Lee, JH, Li, X, Li, W, Li, Y, Li, C, Lidrych, J, Lin, T, Lisa, MA, Liu, F, Liu, P, Liu, Y, Liu, H, Ljubicic, T, Llope, WJ, Lomnitz, M, Longacre, RS, Luo, X, Luo, S, Ma, GL, Ma, L, Ma, R, Ma, YG, Magdy, N, Majka, R, Mallick, D, Margetis, S, Markert, C, Matis, HS, Mayes, D, Meehan, K, Mei, JC, Miller, ZW, Minaev, NG, Mioduszewski, S, Mishra, D, Mizuno, S, Mohanty, B, Mondal, MM, Morozov, DA, Mustafa, MK, Nasim, Md, Nayak, TK, Nelson, JM, Nemes, DB, Nie, M, Nigmatkulov, G, Niida, T, Nogach, LV, Nonaka, T, Nurushev, SB, Odyniec, G, Ogawa, A, Oh, K, Okorokov, VA, Olvitt, D Jr, Page, BS, Pak, R, Pandit, Y, Panebratsev, Y, Pawlik, B, Pei, H, Perkins, C, Pluta, J, Poniatowska, K, Porter, J, Posik, M, Pruthi, NK, Przybycien, M, Putschke, J, Quintero, A, Ramachandran, S, Ray, RL, Reed, R, Rehbein, MJ, Ritter, HG, Roberts, JB, Rogachevskiy, OV, Romero, JL, Roth, JD, Ruan, L, Rusnak, J, Rusnakova, O, Sahoo, NR, Sahu, PK, Salur, S, Sandweiss, J, Saur, M, Schambach, J, Schmah, AM, Schmidke, WB, Schmitz, N, Schweid, BR, Seger, J, Sergeeva, M, Seto, R, Seyboth, P, Shah, N, Shahaliev, E, Shanmuganathan, PV, Shao, M, Shen, WQ, Shi, SS, Shi, Z, Shou, QY, Sichtermann, EP, Sikora, R, Simko, M, Singha, S, Skoby, MJ, Smirnov, N, Smirnov, D, 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, Y, Sun, X, Sun, XM, Surrow, B, Svirida, DN, Tang, AH, Tang, Z, Taranenko, A, Tarnowsky, T, Tawfik, A, Thader, J, Thomas, JH, Timmins, AR, Tlusty, D, Todoroki, T, Tokarev, M, Trentalange, S, Tribble, RE, Tribedy, P, Tripathy, SK, Trzeciak, BA, Tsai, OD, Ullrich, T, Underwood, DG, Upsal, I, Van Buren, G, van Nieuwenhuizen, G, Vasiliev, AN, Videbaek, F, Vokal, S, Voloshin, SA, Vossen, A, Wang, G, Wang, Y, Wang, F, Wang, Y, Webb, G, Webb, JC, Wen, L, Westfall, GD, Wieman, H, Wissink, SW, Witt, R, Wu, Y, Xiao, ZG, Xie, G, Xie, W, Xu, YF, Xu, J, Xu, QH, Xu, N, Xu, Z, Yang, S, Yang, Y, Yang, C, Yang, Q, Ye, Z, Ye, Z, Yi, L, Yip, K, Yoo, I-K, Yu, N, Zbroszczyk, H, Zha, W, Zhang, Z, Zhang, J, Zhang, S, Zhang, S, Zhang, J, Zhang, Y, Zhang, XP, Zhang, JB, Zhao, J, Zhong, C, Zhou, L, Zhou, C, Zhu, X, Zhu, Z and Zyzak, M
(2018)
Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at root s=500 GeV.
PHYSICAL REVIEW D, 97 (3).
032004-.
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Abstract
We report the first measurements of transverse single-spin asymmetries for
inclusive jet and jet + $\pi^{\pm}$ production at midrapidity from transversely
polarized proton-proton collisions at $\sqrt{s} = 500$ GeV. The data were
collected in 2011 with the STAR detector sampled from 23 pb$^{-1}$ integrated
luminosity with an average beam polarization of 53%. Asymmetries are reported
for jets with transverse momenta $6 < p_{T, jet} < 55$ GeV/c and pseudorapidity
$|\eta| < 1$. Presented are measurements of the inclusive-jet azimuthal
transverse single-spin asymmetry, sensitive to twist-3 initial-state
quark-gluon correlators; the Collins asymmetry, sensitive to quark transversity
coupled to the polarized Collins fragmentation function; and the first
measurement of the "Collins-like" asymmetry, sensitive to linearly polarized
gluons. Within the present statistical precision, inclusive-jet and
Collins-like asymmetries are small, with the latter allowing the first
experimental constraints on gluon linear polarization in a polarized proton. At
higher values of jet transverse momenta, we observe the first non-zero Collins
asymmetries in polarized-proton collisions, with a statistical significance of
greater than $5\sigma$. The results span a range of x similar to results from
SIDIS but at much higher $Q^{2}$. The Collins results enable tests of
universality and factorization-breaking in the transverse momentum-dependent
formulation of perturbative quantum chromodynamics.
Dimensions
Dimensions
