Comparison of transverse single-spin asymmetries for forward π0 production in polarized pp , pAl and pAu collisions at nucleon pair c.m. energy sNN=200  GeV Academic Article uri icon

abstract

  • The STAR Collaboration reports a measurement of the transverse single-spin asymmetries, $A_{N}$, for neutral pions produced in polarized proton collisions with protons ($pp$), with aluminum nuclei ($p
    m{Al}$) and with gold nuclei ($p
    m{Au}$) at a nucleon-nucleon center-of-mass energy of 200 GeV. Neutral pions are observed in the forward direction relative to the transversely polarized proton beam, in the pseudo-rapidity region $2.7angle} = -0.027 pm 0.005$. No significant difference in $P$ is observed between the low-$p_T$ region, $p_T<2.5$ GeV/$c$, where gluon saturation effects may play a role, and the high-$p_T$ region, $p_T>2.5$ GeV/$c$. It is further observed that the value of $A_N$ is significantly larger for events with a large-$p_T$ isolated $pi^0$ than for events with a non-isolated $pi^0$ accompanied by additional jet-like fragments. The nuclear dependence $r(A)$ is similar for isolated and non-isolated $pi^0$ events.

published proceedings

  • Physical Review D

altmetric score

  • 1.1

author list (cited authors)

  • Adam, J., Adamczyk, L., Adams, J. R., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., ... Zyzak, M

citation count

  • 3

complete list of authors

  • Adam, J||Adamczyk, L||Adams, JR||Adkins, JK||Agakishiev, G||Aggarwal, MM||Ahammed, Z||Alekseev, I||Anderson, DM||Aparin, A||Aschenauer, EC||Ashraf, MU||Atetalla, FG||Attri, A||Averichev, GS||Bairathi, V||Barish, K||Behera, A||Bellwied, R||Bhasin, A||Bielcik, J||Bielcikova, J||Bland, LC||Bordyuzhin, IG||Brandenburg, JD||Brandin, AV||Butterworth, J||Caines, H||Calderón de la Barca Sánchez, M||Cebra, D||Chakaberia, I||Chaloupka, P||Chan, BK||Chang, F-H||Chang, Z||Chankova-Bunzarova, N||Chatterjee, A||Chen, D||Chen, J||Chen, JH||Chen, X||Chen, Z||Cheng, J||Cherney, M||Chevalier, M||Choudhury, S||Christie, W||Chu, X||Crawford, HJ||Csanád, M||Daugherity, M||Dedovich, TG||Deppner, IM||Derevschikov, AA||Didenko, L||Dilks, C||Dong, X||Drachenberg, JL||Dunlop, JC||Edmonds, T||Elsey, N||Engelage, J||Eppley, G||Esumi, S||Evdokimov, O||Ewigleben, A||Eyser, O||Fatemi, R||Fazio, S||Federic, P||Fedorisin, J||Feng, CJ||Feng, Y||Filip, P||Finch, E||Fisyak, Y||Francisco, A||Fulek, L||Gagliardi, CA||Galatyuk, T||Geurts, F||Gibson, A||Gopal, K||Gou, X||Grosnick, D||Guryn, W||Hamad, AI||Hamed, A||Harabasz, S||Harris, JW||He, S||He, W||He, XH||He, Y||Heppelmann, S||Heppelmann, S||Herrmann, N||Hoffman, E||Holub, L||Hong, Y||Horvat, S||Hu, Y||Huang, HZ||Huang, SL||Huang, T||Huang, X||Humanic, TJ||Huo, P||Igo, G||Isenhower, D||Jacobs, WW||Jena, C||Jentsch, A||Ji, Y||Jia, J||Jiang, K||Jowzaee, S||Ju, X||Judd, EG||Kabana, S||Kabir, ML||Kagamaster, S||Kalinkin, D||Kang, K||Kapukchyan, D||Kauder, K||Ke, HW||Keane, D||Kechechyan, A||Kelsey, M||Khyzhniak, YV||Kikoła, DP||Kim, C||Kimelman, B||Kincses, D||Kinghorn, TA||Kisel, I||Kiselev, A||Kocan, M||Kochenda, L||Koetke, DD||Kosarzewski, LK||Kramarik, L||Kravtsov, P||Krueger, K||Kulathunga Mudiyanselage, N||Kumar, L||Kumar, S||Kunnawalkam Elayavalli, R||Kwasizur, JH||Lacey, R||Lan, S||Landgraf, JM||Lauret, J||Lebedev, A||Lednicky, R||Lee, JH||Leung, YH||Li, C||Li, C||Li, W||Li, W||Li, X||Li, Y||Liang, Y||Licenik, R||Lin, T||Lin, Y||Lisa, MA||Liu, F||Liu, H||Liu, P||Liu, P||Liu, T||Liu, X||Liu, Y||Liu, Z||Ljubicic, T||Llope, WJ||Longacre, RS||Lukow, NS||Luo, S||Luo, X||Ma, GL||Ma, L||Ma, R||Ma, YG||Magdy, N||Majka, R||Mallick, D||Margetis, S||Markert, C||Matis, HS||Mazer, JA||Minaev, NG||Mioduszewski, S||Mohanty, B||Mondal, MM||Mooney, I||Moravcova, Z||Morozov, DA||Nagy, M||Nam, JD||Nasim, Md||Nayak, K||Neff, D||Nelson, JM||Nemes, DB||Nie, M||Nigmatkulov, G||Niida, T||Nogach, LV||Nonaka, T||Nunes, AS||Odyniec, G||Ogawa, A||Oh, S||Okorokov, VA||Page, BS||Pak, R||Pandav, A||Panebratsev, Y||Pawlik, B||Pawlowska, D||Pei, H||Perkins, C||Pinsky, L||Pintér, RL||Pluta, J||Porter, J||Posik, M||Pruthi, NK||Przybycien, M||Putschke, J||Qiu, H||Quintero, A||Radhakrishnan, SK||Ramachandran, S||Ray, RL||Reed, R||Ritter, HG||Rogachevskiy, OV||Romero, JL||Ruan, L||Rusnak, J||Sahoo, NR||Sako, H||Salur, S||Sandweiss, J||Sato, S||Schmidke, WB||Schmitz, N||Schweid, BR||Seck, F||Seger, J||Sergeeva, M||Seto, R||Seyboth, P||Shah, N||Shahaliev, E||Shanmuganathan, PV||Shao, M||Sheikh, AI||Shen, WQ||Shi, SS||Shi, Y||Shou, QY||Sichtermann, EP||Sikora, R||Simko, M||Singh, J||Singha, S||Smirnov, N||Solyst, W||Sorensen, P||Spinka, HM||Srivastava, B||Stanislaus, TDS||Stefaniak, M||Stewart, DJ||Strikhanov, M||Stringfellow, B||Suaide, AAP||Sumbera, M||Summa, B||Sun, XM||Sun, X||Sun, Y||Sun, Y||Surrow, B||Svirida, DN||Szymanski, P||Tang, AH||Tang, Z||Taranenko, A||Tarnowsky, T||Thomas, JH||Timmins, AR||Tlusty, D||Tokarev, M||Tomkiel, CA||Trentalange, S||Tribble, RE||Tribedy, P||Tripathy, SK||Tsai, OD||Tu, Z||Ullrich, T||Underwood, DG||Upsal, I||Van Buren, G||Vanek, J||Vasiliev, AN||Vassiliev, I||Videbæk, F||Vokal, S||Voloshin, SA||Wang, F||Wang, G||Wang, JS||Wang, P||Wang, Y||Wang, Y||Wang, Z||Webb, JC||Weidenkaff, PC||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, Y||Xu, Z||Xu, Z||Yang, C||Yang, Q||Yang, S||Yang, Y||Yang, Z||Ye, Z||Ye, Z||Yi, L||Yip, K||Yu, Y||Zbroszczyk, H||Zha, W||Zhang, C||Zhang, D||Zhang, S||Zhang, S||Zhang, XP||Zhang, Y||Zhang, Y||Zhang, ZJ||Zhang, Z||Zhang, Z||Zhao, J||Zhong, C||Zhou, C||Zhu, X||Zhu, Z||Zurek, M||Zyzak, M

publication date

  • April 2021