1. Evidence for Nonlinear Gluon Effects in QCD and Their Mass Number Dependence at STAR
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M S, Abdallah, B E, Aboona, J, Adam, L, Adamczyk, J R, Adams, J K, Adkins, G, Agakishiev, I, Aggarwal, M M, Aggarwal, Z, Ahammed, I, Alekseev, D M, Anderson, A, Aparin, E C, Aschenauer, M U, Ashraf, F G, Atetalla, A, Attri, G S, Averichev, V, Bairathi, W, Baker, J G, Ball Cap, K, Barish, A, Behera, R, Bellwied, P, Bhagat, A, Bhasin, J, Bielcik, J, Bielcikova, I G, Bordyuzhin, J D, Brandenburg, A V, Brandin, I, Bunzarov, X Z, Cai, H, Caines, M, Calderón de la Barca Sánchez, D, Cebra, I, Chakaberia, P, Chaloupka, B K, Chan, F-H, Chang, Z, Chang, N, Chankova-Bunzarova, A, Chatterjee, S, Chattopadhyay, D, Chen, J, Chen, J H, Chen, X, Chen, Z, Chen, J, Cheng, M, Chevalier, S, Choudhury, W, Christie, X, Chu, H J, Crawford, M, Csanád, M, Daugherity, T G, Dedovich, I M, Deppner, A A, Derevschikov, A, Dhamija, L, Di Carlo, L, Didenko, P, Dixit, X, Dong, J L, Drachenberg, E, Duckworth, J C, Dunlop, N, Elsey, J, Engelage, G, Eppley, S, Esumi, O, Evdokimov, A, Ewigleben, O, Eyser, R, Fatemi, F M, Fawzi, S, Fazio, P, Federic, J, Fedorisin, C J, Feng, Y, Feng, P, Filip, E, Finch, Y, Fisyak, A, Francisco, C, Fu, L, Fulek, C A, Gagliardi, T, Galatyuk, F, Geurts, N, Ghimire, A, Gibson, K, Gopal, X, Gou, D, Grosnick, A, Gupta, W, Guryn, A I, Hamad, A, Hamed, Y, Han, S, Harabasz, M D, Harasty, J W, Harris, H, Harrison, S, He, W, He, X H, He, Y, He, S, Heppelmann, N, Herrmann, E, Hoffman, L, Holub, Y, Hu, H, Huang, H Z, Huang, S L, Huang, T, Huang, X, Huang, Y, Huang, T J, Humanic, G, Igo, D, Isenhower, W W, Jacobs, C, Jena, A, Jentsch, Y, Ji, J, Jia, K, Jiang, X, Ju, E G, Judd, S, Kabana, M L, Kabir, S, Kagamaster, D, Kalinkin, K, Kang, D, Kapukchyan, K, Kauder, H W, Ke, D, Keane, A, Kechechyan, M, Kelsey, Y V, Khyzhniak, D P, Kikoła, C, Kim, B, Kimelman, D, Kincses, I, Kisel, A, Kiselev, A G, Knospe, H S, Ko, L, Kochenda, L K, Kosarzewski, L, Kramarik, P, Kravtsov, L, Kumar, S, Kumar, R, Kunnawalkam Elayavalli, J H, Kwasizur, R, Lacey, S, Lan, J M, Landgraf, J, Lauret, A, Lebedev, R, Lednicky, J H, Lee, Y H, Leung, N, Lewis, C, Li, W, Li, X, Li, Y, Li, X, Liang, Y, Liang, R, Licenik, T, Lin, Y, Lin, M A, Lisa, F, Liu, H, Liu, P, Liu, T, Liu, X, Liu, Y, Liu, Z, Liu, T, Ljubicic, W J, Llope, R S, Longacre, E, Loyd, N S, Lukow, X F, Luo, L, Ma, R, Ma, Y G, Ma, N, Magdy Abdelwahab Abdelrahman, D, Mallick, S, Margetis, C, Markert, H S, Matis, J A, Mazer, N G, Minaev, S, Mioduszewski, B, Mohanty, M M, Mondal, I, Mooney, D A, Morozov, A, Mukherjee, M, Nagy, J D, Nam, Md, Nasim, K, Nayak, D, Neff, J M, Nelson, D B, Nemes, M, Nie, G, Nigmatkulov, T, Niida, R, Nishitani, L V, Nogach, T, Nonaka, A S, Nunes, G, Odyniec, A, Ogawa, S, Oh, V A, Okorokov, B S, Page, R, Pak, J, Pan, A, Pandav, A K, Pandey, Y, Panebratsev, P, Parfenov, B, Pawlik, D, Pawlowska, C, Perkins, L, Pinsky, R L, Pintér, J, Pluta, B R, Pokhrel, G, Ponimatkin, J, Porter, M, Posik, V, Prozorova, N K, Pruthi, M, Przybycien, J, Putschke, H, Qiu, A, Quintero, C, Racz, S K, Radhakrishnan, N, Raha, R L, Ray, R, Reed, H G, Ritter, M, Robotkova, O V, Rogachevskiy, J L, Romero, D, Roy, L, Ruan, J, Rusnak, A K, Sahoo, N R, Sahoo, H, Sako, S, Salur, J, Sandweiss, S, Sato, W B, Schmidke, N, Schmitz, B R, Schweid, F, Seck, J, Seger, M, Sergeeva, R, Seto, P, Seyboth, N, Shah, E, Shahaliev, P V, Shanmuganathan, M, Shao, T, Shao, A I, Sheikh, D Y, Shen, S S, Shi, Y, Shi, Q Y, Shou, E P, Sichtermann, R, Sikora, M, Simko, J, Singh, S, Singha, M J, Skoby, N, Smirnov, Y, Söhngen, W, Solyst, P, Sorensen, H M, Spinka, B, Srivastava, T D S, Stanislaus, M, Stefaniak, D J, Stewart, M, Strikhanov, B, Stringfellow, A A P, Suaide, M, Sumbera, B, Summa, X M, Sun, X, Sun, Y, Sun, B, Surrow, D N, Svirida, Z W, Sweger, P, Szymanski, A H, Tang, Z, Tang, A, Taranenko, T, Tarnowsky, J H, Thomas, A R, Timmins, D, Tlusty, T, Todoroki, M, Tokarev, C A, Tomkiel, S, Trentalange, R E, Tribble, P, Tribedy, S K, Tripathy, T, Truhlar, B A, Trzeciak, O D, Tsai, Z, Tu, T, Ullrich, D G, Underwood, I, Upsal, G, Van Buren, J, Vanek, A N, Vasiliev, I, Vassiliev, V, Verkest, F, Videbæk, S, Vokal, S A, Voloshin, F, Wang, G, Wang, J S, Wang, P, Wang, X, Wang, Y, Wang, Z, Wang, J C, Webb, P C, Weidenkaff, L, Wen, G D, Westfall, H, Wieman, S W, Wissink, J, Wu, Y, Wu, B, Xi, Z G, Xiao, G, Xie, W, Xie, H, Xu, N, Xu, Q H, Xu, Y, Xu, Z, Xu, G, Yan, C, Yang, Q, Yang, S, Yang, Y, Yang, Z, Ye, L, Yi, K, Yip, Y, Yu, H, Zbroszczyk, W, Zha, C, Zhang, D, Zhang, J, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z J, Zhang, Z, Zhang, J, Zhao, C, Zhou, Y, Zhou, X, Zhu, M, Zurek, and M, Zyzak
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General Physics and Astronomy ,CROMODINÂMICA QUÂNTICA - Abstract
The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-π^{0}s produced at forward pseudorapidities (2.6η4.0) in p+p, p+Al, and p+Au collisions at a center-of-mass energy of 200 GeV. We observe a clear suppression of the correlated yields of back-to-back π^{0} pairs in p+Al and p+Au collisions compared to the p+p data. The observed suppression of back-to-back pairs as a function of transverse momentum suggests nonlinear gluon dynamics arising at high parton densities. The larger suppression found in p+Au relative to p+Al collisions exhibits a dependence of the saturation scale Q_{s}^{2} on the mass number A. A linear scaling of the suppression with A^{1/3} is observed with a slope of -0.09±0.01.
- Published
- 2022