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1. Measurements of Proton High-Order Cumulants in sqrt[s_{NN}]=3 GeV Au+Au Collisions and Implications for the QCD Critical Point

Author: 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, 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, 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, Y, Song, 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, R, Witt, 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
Abstract: We report cumulants of the proton multiplicity distribution from dedicated fixed-target Au+Au collisions at sqrt[s_{NN}]=3.0 GeV, measured by the STAR experiment in the kinematic acceptance of rapidity (y) and transverse momentum (p_{T}) within -0.5y0 and 0.4p_{T}2.0 GeV/c. In the most central 0%-5% collisions, a proton cumulant ratio is measured to be C_{4}/C_{2}=-0.85±0.09 (stat)±0.82 (syst), which is 2σ below the Poisson baseline with respect to both the statistical and systematic uncertainties. The hadronic transport UrQMD model reproduces our C_{4}/C_{2} in the measured acceptance. Compared to higher energy results and the transport model calculations, the suppression in C_{4}/C_{2} is consistent with fluctuations driven by baryon number conservation and indicates an energy regime dominated by hadronic interactions. These data imply that the QCD critical region, if created in heavy-ion collisions, could only exist at energies higher than 3 GeV.
Published: 2021

2. Precise Measurement of Differential Cross Sections of the Σ^{-}p→Λn Reaction in Momentum Range 470-650 MeV/c

Author: K, Miwa, J K, Ahn, Y, Akazawa, T, Aramaki, S, Ashikaga, S, Callier, N, Chiga, S W, Choi, H, Ekawa, P, Evtoukhovitch, N, Fujioka, M, Fujita, T, Gogami, T, Harada, S, Hasegawa, S H, Hayakawa, R, Honda, S, Hoshino, K, Hosomi, M, Ichikawa, Y, Ichikawa, M, Ieiri, M, Ikeda, K, Imai, Y, Ishikawa, S, Ishimoto, W S, Jung, S, Kajikawa, H, Kanauchi, H, Kanda, T, Kitaoka, B M, Kang, H, Kawai, S H, Kim, K, Kobayashi, T, Koike, K, Matsuda, Y, Matsumoto, S, Nagao, R, Nagatomi, Y, Nakada, M, Nakagawa, I, Nakamura, T, Nanamura, M, Naruki, S, Ozawa, L, Raux, T G, Rogers, A, Sakaguchi, T, Sakao, H, Sako, S, Sato, T, Shiozaki, K, Shirotori, K N, Suzuki, S, Suzuki, M, Tabata, C D L, Taille, H, Takahashi, T, Takahashi, T N, Takahashi, H, Tamura, M, Tanaka, K, Tanida, Z, Tsamalaidze, M, Ukai, H, Umetsu, S, Wada, T O, Yamamoto, J, Yoshida, and K, Yoshimura
Abstract: The differential cross sections of the Σ^{-}p→Λn reaction were measured accurately for the Σ^{-} momentum (p_{Σ}) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental Facility. Precise angular information about the Σ^{-}p→Λn reaction was obtained for the first time by detecting approximately 100 reaction events at each angular step of Δcosθ=0.1. The obtained differential cross sections show a slightly forward-peaking structure in the measured momentum regions. The cross sections integrated for -0.7≤cosθ≤1.0 were obtained as 22.5±0.68 [statistical error(stat.)] ±0.65 [systematic error(syst.)] mb and 15.8±0.83(stat)±0.52(syst) mb for 470p_{Σ}(MeV/c)550 and 550p_{Σ}(MeV/c)650, respectively. These results show a drastic improvement compared with past measurements of the hyperon-proton scattering experiments. They will play essential roles in updating the theoretical models of the baryon-baryon interactions.
Published: 2021

3. Measurements of _{Λ}^{3}H and _{Λ}^{4}H Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region

Author: 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, 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, Videbaek, 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, R, Witt, 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
Abstract: We report precision measurements of hypernuclei _{Λ}^{3}H and _{Λ}^{4}H lifetimes obtained from Au+Au collisions at sqrt[s_{NN}]=3.0 GeV and 7.2 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider, and the first measurement of _{Λ}^{3}H and _{Λ}^{4}H midrapidity yields in Au+Au collisions at sqrt[s_{NN}]=3.0 GeV. _{Λ}^{3}H and _{Λ}^{4}H, being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be 221±15(stat)±19(syst) ps for _{Λ}^{3}H and 218±6(stat)±13(syst) ps for _{Λ}^{4}H. The p_{T}-integrated yields of _{Λ}^{3}H and _{Λ}^{4}H are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of _{Λ}^{4}H is different for 0%-10% and 10%-50% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the _{Λ}^{3}H yield well, while underestimating the _{Λ}^{4}H yield. Transport models, combining baryonic mean-field and coalescence (jam) or utilizing dynamical cluster formation via baryonic interactions (phqmd) for light nuclei and hypernuclei production, approximately describe the measured _{Λ}^{3}H and _{Λ}^{4}H yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei.
Published: 2021

4. Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au+Au Collisions at sqrt[s_{NN}]=200 GeV

Author: M S, Abdallah, 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, J, Butterworth, 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, X, Dong, J L, Drachenberg, J C, Dunlop, N, Elsey, J, Engelage, G, Eppley, S, Esumi, 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, Y V, Khyzhniak, D P, Kikoła, C, Kim, B, Kimelman, D, Kincses, I, Kisel, A, Kiselev, A G, Knospe, L, Kochenda, L K, Kosarzewski, L, Kramarik, P, Kravtsov, L, Kumar, S, Kumar, R, Kunnawalkam Elayavalli, J H, Kwasizur, S, Lan, J M, Landgraf, J, Lauret, A, Lebedev, R, Lednicky, J H, Lee, Y H, Leung, 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, Luo, L, Ma, R, Ma, Y G, Ma, N, Magdy, R, Majka, 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, A, Pandav, A K, Pandey, Y, Panebratsev, P, Parfenov, B, Pawlik, D, Pawlowska, H, Pei, 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, L, Ruan, J, Rusnak, 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, 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, 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, C, Yang, Q, Yang, S, Yang, Y, Yang, Z, Ye, L, Yi, K, Yip, Y, Yu, H, Zbroszczyk, W, Zha, C, Zhang, D, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z J, Zhang, Z, Zhang, J, Zhao, C, Zhou, X, Zhu, Z, Zhu, M, Zurek, and M, Zyzak
Abstract: The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au+Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in midcentral (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
Published: 2021

5. Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au+Au Collisions at sqrt[s_{NN}]=27, 54.4, and 200 GeV at RHIC

Author: M S, Abdallah, 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, J, Butterworth, 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, 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, Y V, Khyzhniak, D P, Kikoła, C, Kim, B, Kimelman, D, Kincses, I, Kisel, A, Kiselev, A G, Knospe, 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, 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, Luo, L, Ma, R, Ma, Y G, Ma, N, Magdy, R, Majka, 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, A, Pandav, A K, Pandey, Y, Panebratsev, P, Parfenov, B, Pawlik, D, Pawlowska, H, Pei, 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, L, Ruan, J, Rusnak, 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, 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, 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, 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, X, Zhu, Z, Zhu, M, Zurek, and M, Zyzak
Abstract: According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region μ_{B}≤T_{c}. In this range the ratio, C_{6}/C_{2}, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C_{6}/C_{2} from 27, 54.4, and 200 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (p_{T}, y) are analyzed. While for 27 and 54.4 GeV collisions the C_{6}/C_{2} values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C_{6}/C_{2} ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
Published: 2021

6. Probing Gluon Spin-Momentum Correlations in Transversely Polarized Protons through Midrapidity Isolated Direct Photons in p^{↑}+p Collisions at sqrt[s]=200 GeV

Author: U A, Acharya, C, Aidala, Y, Akiba, M, Alfred, V, Andrieux, N, Apadula, H, Asano, B, Azmoun, V, Babintsev, N S, Bandara, K N, Barish, S, Bathe, A, Bazilevsky, M, Beaumier, R, Belmont, A, Berdnikov, Y, Berdnikov, L, Bichon, B, Blankenship, D S, Blau, J S, Bok, M L, Brooks, J, Bryslawskyj, V, Bumazhnov, S, Campbell, V, Canoa Roman, R, Cervantes, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, Z, Citron, M, Connors, R, Corliss, Y, Corrales Morales, N, Cronin, M, Csanád, T, Csörgő, T W, Danley, M S, Daugherity, G, David, K, DeBlasio, K, Dehmelt, A, Denisov, A, Deshpande, E J, Desmond, A, Dion, D, Dixit, J H, Do, A, Drees, K A, Drees, J M, Durham, A, Durum, A, Enokizono, H, En'yo, R, Esha, S, Esumi, B, Fadem, W, Fan, N, Feege, D E, Fields, M, Finger, D, Fitzgerald, S L, Fokin, J E, Frantz, A, Franz, A D, Frawley, Y, Fukuda, C, Gal, P, Gallus, P, Garg, H, Ge, M, Giles, F, Giordano, Y, Goto, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H, Guragain, T, Hachiya, J S, Haggerty, K I, Hahn, H, Hamagaki, H F, Hamilton, S Y, Han, J, Hanks, M, Harvey, S, Hasegawa, T O S, Haseler, X, He, T K, Hemmick, J C, Hill, K, Hill, A, Hodges, R S, Hollis, K, Homma, B, Hong, T, Hoshino, N, Hotvedt, J, Huang, S, Huang, K, Imai, M, Inaba, A, Iordanova, D, Isenhower, D, Ivanishchev, B V, Jacak, M, Jezghani, Z, Ji, X, Jiang, B M, Johnson, D, Jouan, D S, Jumper, J H, Kang, D, Kapukchyan, S, Karthas, D, Kawall, A V, Kazantsev, V, Khachatryan, A, Khanzadeev, A, Khatiwada, C, Kim, E-J, Kim, M, Kim, D, Kincses, A, Kingan, E, Kistenev, J, Klatsky, P, Kline, T, Koblesky, D, Kotov, S, Kudo, B, Kurgyis, K, Kurita, Y, Kwon, J G, Lajoie, D, Larionova, A, Lebedev, S, Lee, S H, Lee, M J, Leitch, Y H, Leung, N A, Lewis, X, Li, S H, Lim, M X, Liu, V-R, Loggins, S, Lökös, D A, Loomis, K, Lovasz, D, Lynch, T, Majoros, Y I, Makdisi, M, Makek, V I, Manko, E, Mannel, M, McCumber, P L, McGaughey, D, McGlinchey, C, McKinney, M, Mendoza, A C, Mignerey, A, Milov, D K, Mishra, J T, Mitchell, Iu, Mitrankov, M, Mitrankova, G, Mitsuka, S, Miyasaka, S, Mizuno, M M, Mondal, P, Montuenga, T, Moon, D P, Morrison, B, Mulilo, T, Murakami, J, Murata, K, Nagai, K, Nagashima, T, Nagashima, J L, Nagle, M I, Nagy, I, Nakagawa, K, Nakano, C, Nattrass, S, Nelson, T, Niida, R, Nouicer, T, Novák, N, Novitzky, G, Nukazuka, A S, Nyanin, E, O'Brien, C A, Ogilvie, J D, Orjuela Koop, J D, Osborn, A, Oskarsson, G J, Ottino, K, Ozawa, V, Pantuev, V, Papavassiliou, J S, Park, S, Park, S F, Pate, M, Patel, W, Peng, D V, Perepelitsa, G D N, Perera, D Yu, Peressounko, C E, PerezLara, J, Perry, R, Petti, M, Phipps, C, Pinkenburg, R P, Pisani, M, Potekhin, A, Pun, M L, Purschke, P V, Radzevich, N, Ramasubramanian, K F, Read, D, Reynolds, V, Riabov, Y, Riabov, D, Richford, T, Rinn, S D, Rolnick, M, Rosati, Z, Rowan, J, Runchey, A S, Safonov, T, Sakaguchi, H, Sako, V, Samsonov, M, Sarsour, S, Sato, B, Schaefer, B K, Schmoll, K, Sedgwick, R, Seidl, A, Sen, R, Seto, A, Sexton, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, T, Shioya, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, B K, Singh, C P, Singh, V, Singh, M, Slunečka, K L, Smith, M, Snowball, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, S P, Stoll, T, Sugitate, A, Sukhanov, T, Sumita, J, Sun, Z, Sun, J, Sziklai, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, G, Tarnai, R, Tieulent, A, Timilsina, T, Todoroki, M, Tomášek, C L, Towell, R S, Towell, I, Tserruya, Y, Ueda, B, Ujvari, H W, van Hecke, J, Velkovska, M, Virius, V, Vrba, N, Vukman, X R, Wang, Y S, Watanabe, C P, Wong, C L, Woody, C, Xu, Q, Xu, L, Xue, S, Yalcin, Y L, Yamaguchi, H, Yamamoto, A, Yanovich, J H, Yoo, I, Yoon, H, Yu, I E, Yushmanov, W A, Zajc, A, Zelenski, S, Zharko, and L, Zou
Abstract: Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in p^{↑}+p collisions at sqrt[s]=200 GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). Because direct photons in particular are produced from the hard scattering and do not interact via the strong force, this measurement is a clean probe of initial-state spin-momentum correlations inside the proton and is in particular sensitive to gluon interference effects within the proton. This is the first time direct photons have been used as a probe of spin-momentum correlations at RHIC. The uncertainties on the results are a 50-fold improvement with respect to those of the one prior measurement for the same observable, from the Fermilab E704 experiment. These results constrain gluon spin-momentum correlations in transversely polarized protons.
Published: 2021

7. Observation of D_{s}^{±}/D^{0} Enhancement in Au+Au Collisions at sqrt[s_{NN}]=200 GeV

Author: J, Adam, L, Adamczyk, J R, Adams, J K, Adkins, G, Agakishiev, 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, K, Barish, A, Behera, R, Bellwied, A, Bhasin, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, J D, Brandenburg, A V, Brandin, J, Butterworth, 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, D, Chen, J, Chen, J H, Chen, X, Chen, Z, Chen, J, Cheng, M, Cherney, M, Chevalier, S, Choudhury, W, Christie, X, Chu, H J, Crawford, M, Csanád, M, Daugherity, T G, Dedovich, I M, Deppner, A A, Derevschikov, L, Didenko, X, Dong, J L, Drachenberg, J C, Dunlop, T, Edmonds, N, Elsey, J, Engelage, G, Eppley, S, Esumi, O, Evdokimov, A, Ewigleben, O, Eyser, R, Fatemi, 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, W, Guryn, A I, Hamad, A, Hamed, S, Harabasz, J W, Harris, S, He, W, He, X, He, Y, He, S, Heppelmann, N, Herrmann, E, Hoffman, L, Holub, Y, Hong, S, Horvat, Y, Hu, H Z, Huang, S L, Huang, T, Huang, X, Huang, T J, Humanic, P, Huo, G, Igo, D, Isenhower, W W, Jacobs, C, Jena, A, Jentsch, Y, Ji, J, Jia, K, Jiang, S, Jowzaee, 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, T A, Kinghorn, I, Kisel, A, Kiselev, M, Kocan, L, Kochenda, L K, Kosarzewski, L, Kramarik, P, Kravtsov, K, Krueger, N, Kulathunga Mudiyanselage, 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, C, Li, W, Li, X, Li, Y, Li, 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, N S, Lukow, S, Luo, X, Luo, G L, Ma, L, Ma, R, Ma, Y G, Ma, N, Magdy, R, Majka, D, Mallick, S, Margetis, C, Markert, H S, Matis, J A, Mazer, N G, Minaev, S, Mioduszewski, B, Mohanty, I, Mooney, Z, Moravcova, D A, Morozov, M, Nagy, J D, Nam, Md, Nasim, K, Nayak, D, Neff, J M, Nelson, D B, Nemes, M, Nie, G, Nigmatkulov, T, Niida, L V, Nogach, T, Nonaka, A S, Nunes, G, Odyniec, A, Ogawa, S, Oh, V A, Okorokov, B S, Page, R, Pak, A, Pandav, Y, Panebratsev, B, Pawlik, D, Pawlowska, H, Pei, C, Perkins, L, Pinsky, R L, Pintér, J, Pluta, B R, Pokhrel, J, Porter, M, Posik, N K, Pruthi, M, Przybycien, J, Putschke, H, Qiu, A, Quintero, S K, Radhakrishnan, S, Ramachandran, R L, Ray, R, Reed, H G, Ritter, O V, Rogachevskiy, J L, Romero, L, Ruan, J, Rusnak, 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, A I, Sheikh, W Q, Shen, S S, Shi, Y, Shi, Q Y, Shou, E P, Sichtermann, R, Sikora, M, Simko, J, Singh, S, Singha, N, Smirnov, 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, P, Szymanski, A H, Tang, Z, Tang, A, Taranenko, T, Tarnowsky, J H, Thomas, A R, Timmins, D, Tlusty, M, Tokarev, C A, Tomkiel, S, Trentalange, R E, Tribble, P, Tribedy, S K, Tripathy, O D, Tsai, Z, Tu, T, Ullrich, D G, Underwood, I, Upsal, G, Van Buren, J, Vanek, A N, Vasiliev, I, Vassiliev, F, Videbæk, S, Vokal, S A, Voloshin, F, Wang, G, Wang, J S, Wang, P, Wang, Y, Wang, Z, Wang, J C, Webb, P C, Weidenkaff, L, Wen, G D, Westfall, H, Wieman, S W, Wissink, R, Witt, Y, Wu, Z G, Xiao, G, Xie, W, Xie, H, Xu, N, Xu, Q H, Xu, Y F, Xu, Y, Xu, Z, Xu, C, Yang, Q, Yang, S, Yang, Y, Yang, Z, Yang, Z, Ye, L, Yi, K, Yip, Y, Yu, H, Zbroszczyk, W, Zha, C, Zhang, D, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z J, Zhang, Z, Zhang, J, Zhao, C, Zhong, C, Zhou, X, Zhu, Z, Zhu, M, Zurek, and M, Zyzak
Abstract: We report on the first measurement of charm-strange meson D_{s}^{±} production at midrapidity in Au+Au collisions at sqrt[s_{NN}]=200 GeV from the STAR experiment. The yield ratio between strange (D_{s}^{±}) and nonstrange (D^{0}) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a pythia simulation of p+p collisions, is observed in the D_{s}^{±}/D^{0} yield ratio in Au+Au collisions over a large range of collision centralities. Model calculations incorporating abundant strange-quark production in the quark-gluon plasma and coalescence hadronization qualitatively reproduce the data. The transverse-momentum integrated yield ratio of D_{s}^{±}/D^{0} at midrapidity is consistent with a prediction from a statistical hadronization model with the parameters constrained by the yields of light and strange hadrons measured at the same collision energy. These results suggest that the coalescence of charm quarks with strange quarks in the quark-gluon plasma plays an important role in D_{s}^{±}-meson production in heavy-ion collisions.
Published: 2021

8. Global Polarization of Ξ and Ω Hyperons in Au+Au Collisions at sqrt[s_{NN}]=200 GeV

Author: J, Adam, L, Adamczyk, J R, Adams, J K, Adkins, G, Agakishiev, 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, K, Barish, A, Behera, R, Bellwied, A, Bhasin, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, J D, Brandenburg, A V, Brandin, J, Butterworth, 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, D, Chen, J, Chen, J H, Chen, X, Chen, Z, Chen, J, Cheng, M, Cherney, M, Chevalier, S, Choudhury, W, Christie, X, Chu, H J, Crawford, M, Csanád, M, Daugherity, T G, Dedovich, I M, Deppner, A A, Derevschikov, L, Didenko, X, Dong, J L, Drachenberg, J C, Dunlop, T, Edmonds, N, Elsey, J, Engelage, G, Eppley, S, Esumi, O, Evdokimov, A, Ewigleben, O, Eyser, R, Fatemi, S, Fazio, P, Federic, J, Fedorisin, C J, Feng, Y, Feng, P, Filip, E, Finch, Y, Fisyak, A, Francisco, L, Fulek, C A, Gagliardi, T, Galatyuk, F, Geurts, N, Ghimire, A, Gibson, K, Gopal, X, Gou, D, Grosnick, W, Guryn, A I, Hamad, A, Hamed, S, Harabasz, J W, Harris, S, He, W, He, X H, He, Y, He, S, Heppelmann, N, Herrmann, E, Hoffman, L, Holub, Y, Hong, S, Horvat, Y, Hu, H Z, Huang, S L, Huang, T, Huang, X, Huang, T J, Humanic, P, Huo, G, Igo, D, Isenhower, W W, Jacobs, C, Jena, A, Jentsch, Y, Ji, J, Jia, K, Jiang, S, Jowzaee, 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, T A, Kinghorn, I, Kisel, A, Kiselev, M, Kocan, L, Kochenda, L K, Kosarzewski, L, Kramarik, P, Kravtsov, K, Krueger, N, Kulathunga Mudiyanselage, 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, C, Li, W, Li, X, Li, Y, Li, 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, N S, Lukow, S, Luo, X, Luo, G L, Ma, L, Ma, R, Ma, Y G, Ma, N, Magdy, R, Majka, D, Mallick, S, Margetis, C, Markert, H S, Matis, J A, Mazer, N G, Minaev, S, Mioduszewski, B, Mohanty, I, Mooney, Z, Moravcova, D A, Morozov, M, Nagy, J D, Nam, Md, Nasim, K, Nayak, D, Neff, J M, Nelson, D B, Nemes, M, Nie, G, Nigmatkulov, T, Niida, L V, Nogach, T, Nonaka, A S, Nunes, G, Odyniec, A, Ogawa, S, Oh, V A, Okorokov, B S, Page, R, Pak, A, Pandav, Y, Panebratsev, B, Pawlik, D, Pawlowska, H, Pei, C, Perkins, L, Pinsky, R L, Pintér, J, Pluta, B R, Pokhrel, J, Porter, M, Posik, N K, Pruthi, M, Przybycien, J, Putschke, H, Qiu, A, Quintero, S K, Radhakrishnan, S, Ramachandran, R L, Ray, R, Reed, H G, Ritter, O V, Rogachevskiy, J L, Romero, L, Ruan, J, Rusnak, 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, A I, Sheikh, W Q, Shen, S S, Shi, Y, Shi, Q Y, Shou, E P, Sichtermann, R, Sikora, M, Simko, J, Singh, S, Singha, N, Smirnov, 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, P, Szymanski, A H, Tang, Z, Tang, A, Taranenko, T, Tarnowsky, J H, Thomas, A R, Timmins, D, Tlusty, M, Tokarev, C A, Tomkiel, S, Trentalange, R E, Tribble, P, Tribedy, S K, Tripathy, O D, Tsai, Z, Tu, T, Ullrich, D G, Underwood, I, Upsal, G, Van Buren, J, Vanek, A N, Vasiliev, I, Vassiliev, F, Videbæk, S, Vokal, S A, Voloshin, F, Wang, G, Wang, J S, Wang, P, Wang, Y, Wang, Z, Wang, J C, Webb, P C, Weidenkaff, L, Wen, G D, Westfall, H, Wieman, S W, Wissink, R, Witt, Y, Wu, Z G, Xiao, G, Xie, W, Xie, H, Xu, N, Xu, Q H, Xu, Y F, Xu, Y, Xu, Z, Xu, C, Yang, Q, Yang, S, Yang, Y, Yang, Z, Yang, Z, Ye, L, Yi, K, Yip, Y, Yu, H, Zbroszczyk, W, Zha, C, Zhang, D, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z J, Zhang, Z, Zhang, J, Zhao, C, Zhong, C, Zhou, X, Zhu, Z, Zhu, M, Zurek, and M, Zyzak
Abstract: Global polarization of Ξ and Ω hyperons has been measured for the first time in Au+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements of the Ξ^{-} and Ξ[over ¯]^{+} hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay Ξ→Λ+π, as well as by measuring the polarization of the daughter Λ hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over Ξ^{-} and Ξ[over ¯]^{+}, is measured to be ⟨P_{Ξ}⟩=0.47±0.10(stat)±0.23(syst)% for the collision centrality 20%-80%. The ⟨P_{Ξ}⟩ is found to be slightly larger than the inclusive Λ polarization and in reasonable agreement with a multiphase transport model. The ⟨P_{Ξ}⟩ is found to follow the centrality dependence of the vorticity predicted in the model, increasing toward more peripheral collisions. The global polarization of Ω, ⟨P_{Ω}⟩=1.11±0.87(stat)±1.97(syst)% was obtained by measuring the polarization of daughter Λ in the decay Ω→Λ+K, assuming the polarization transfer factor C_{ΩΛ}=1.
Published: 2020

9. Observation of Coulomb-Assisted Nuclear Bound State of Ξ^{-}-^{14}N System

Author: S H, Hayakawa, K, Agari, J K, Ahn, T, Akaishi, Y, Akazawa, S, Ashikaga, B, Bassalleck, S, Bleser, H, Ekawa, Y, Endo, Y, Fujikawa, N, Fujioka, M, Fujita, R, Goto, Y, Han, S, Hasegawa, T, Hashimoto, T, Hayakawa, E, Hayata, K, Hicks, E, Hirose, M, Hirose, R, Honda, K, Hoshino, S, Hoshino, K, Hosomi, S H, Hwang, Y, Ichikawa, M, Ichikawa, K, Imai, K, Inaba, Y, Ishikawa, H, Ito, K, Ito, W S, Jung, S, Kanatsuki, H, Kanauchi, A, Kasagi, T, Kawai, M H, Kim, S H, Kim, S, Kinbara, R, Kiuchi, H, Kobayashi, K, Kobayashi, T, Koike, A, Koshikawa, J Y, Lee, T L, Ma, S Y, Matsumoto, M, Minakawa, K, Miwa, A T, Moe, T J, Moon, M, Moritsu, Y, Nagase, Y, Nakada, M, Nakagawa, D, Nakashima, K, Nakazawa, T, Nanamura, M, Naruki, A N L, Nyaw, Y, Ogura, M, Ohashi, K, Oue, S, Ozawa, J, Pochodzalla, S Y, Ryu, H, Sako, S, Sato, Y, Sato, F, Schupp, K, Shirotori, M M, Soe, M K, Soe, J Y, Sohn, H, Sugimura, K N, Suzuki, H, Takahashi, T, Takahashi, T, Takeda, H, Tamura, K, Tanida, A M M, Theint, K T, Tint, Y, Toyama, M, Ukai, E, Umezaki, T, Watabe, K, Watanabe, T O, Yamamoto, S B, Yang, C S, Yoon, J, Yoshida, M, Yoshimoto, D H, Zhang, and Z, Zhang
Abstract: In an emulsion-counter hybrid experiment performed at J-PARC, a Ξ^{-} absorption event was observed which decayed into twin single-Λ hypernuclei. Kinematic calculations enabled a unique identification of the reaction process as Ξ^{-}+^{14}N→_{Λ}^{10}Be+_{Λ}^{5}He. For the binding energy of the Ξ^{-} hyperon in the Ξ^{-}-^{14}N system a value of 1.27±0.21 MeV was deduced. The energy level of Ξ^{-} is likely a nuclear 1p state which indicates a weak ΞN-ΛΛ coupling.
Published: 2020

10. First Measurement of Λ_{c} Baryon Production in Au+Au Collisions at sqrt[s_{NN}]=200 GeV

Author: J, Adam, L, Adamczyk, J R, Adams, J K, Adkins, G, Agakishiev, 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, K, Barish, A, Behera, R, Bellwied, A, Bhasin, J, Bielcik, J, Bielcikova, L C, Bland, I G, Bordyuzhin, J D, Brandenburg, A V, Brandin, J, Butterworth, 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, D, Chen, J H, Chen, X, Chen, Z, Chen, J, Cheng, M, Cherney, M, Chevalier, S, Choudhury, W, Christie, H J, Crawford, M, Csanád, M, Daugherity, T G, Dedovich, I M, Deppner, A A, Derevschikov, L, Didenko, X, Dong, J L, Drachenberg, J C, Dunlop, T, Edmonds, N, Elsey, J, Engelage, G, Eppley, R, Esha, S, Esumi, O, Evdokimov, J, Ewigleben, O, Eyser, R, Fatemi, S, Fazio, P, Federic, J, Fedorisin, C J, Feng, Y, Feng, P, Filip, E, Finch, Y, Fisyak, A, Francisco, L, Fulek, C A, Gagliardi, T, Galatyuk, F, Geurts, A, Gibson, K, Gopal, D, Grosnick, W, Guryn, A I, Hamad, A, Hamed, J W, Harris, W, He, X, He, S, Heppelmann, N, Herrmann, E, Hoffman, L, Holub, Y, Hong, S, Horvat, Y, Hu, H Z, Huang, S L, Huang, T, Huang, X, Huang, T J, Humanic, P, Huo, G, Igo, D, Isenhower, W W, Jacobs, C, Jena, A, Jentsch, Y, Ji, J, Jia, K, Jiang, S, Jowzaee, 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, T A, Kinghorn, I, Kisel, A, Kiselev, A, Kisiel, M, Kocan, L, Kochenda, L K, Kosarzewski, L, Kramarik, P, Kravtsov, K, Krueger, N, Kulathunga Mudiyanselage, L, 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, C, Li, W, Li, X, Li, Y, Li, 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, N S, Lukow, S, Luo, X, Luo, G L, Ma, L, Ma, R, Ma, Y G, Ma, N, Magdy, R, Majka, D, Mallick, S, Margetis, C, Markert, H S, Matis, J A, Mazer, N G, Minaev, S, Mioduszewski, B, Mohanty, I, Mooney, Z, Moravcova, D A, Morozov, M, Nagy, J D, Nam, Md, Nasim, K, Nayak, D, Neff, J M, Nelson, D B, Nemes, M, Nie, G, Nigmatkulov, T, Niida, L V, Nogach, T, Nonaka, G, Odyniec, A, Ogawa, S, Oh, V A, Okorokov, B S, Page, R, Pak, A, Pandav, Y, Panebratsev, B, Pawlik, D, Pawlowska, H, Pei, C, Perkins, L, Pinsky, R L, Pintér, J, Pluta, J, Porter, M, Posik, N K, Pruthi, M, Przybycien, J, Putschke, H, Qiu, A, Quintero, S K, Radhakrishnan, S, Ramachandran, R L, Ray, R, Reed, H G, Ritter, J B, Roberts, O V, Rogachevskiy, J L, Romero, L, Ruan, J, Rusnak, 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, F, Shen, W Q, Shen, S S, Shi, Q Y, Shou, E P, Sichtermann, R, Sikora, M, Simko, J, Singh, S, Singha, N, Smirnov, 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, Y, Sun, B, Surrow, D N, Svirida, P, Szymanski, A H, Tang, Z, Tang, A, Taranenko, T, Tarnowsky, J H, Thomas, A R, Timmins, D, Tlusty, M, Tokarev, C A, Tomkiel, S, Trentalange, R E, Tribble, P, Tribedy, S K, Tripathy, O D, Tsai, Z, Tu, T, Ullrich, D G, Underwood, I, Upsal, G, Van Buren, J, Vanek, A N, Vasiliev, I, Vassiliev, F, Videbæk, S, Vokal, S A, Voloshin, F, Wang, G, Wang, J S, Wang, P, Wang, Y, Wang, Z, Wang, J C, Webb, P C, Weidenkaff, L, Wen, G D, Westfall, H, Wieman, S W, Wissink, R, Witt, Y, Wu, Z G, Xiao, G, Xie, W, Xie, H, Xu, N, Xu, Q H, Xu, Y F, Xu, Y, Xu, Z, Xu, C, Yang, Q, Yang, S, Yang, Y, Yang, Z, Yang, Z, Ye, L, Yi, K, Yip, H, Zbroszczyk, W, Zha, D, Zhang, S, Zhang, X P, Zhang, Y, Zhang, Z J, Zhang, Z, Zhang, J, Zhao, C, Zhong, C, Zhou, X, Zhu, Z, Zhu, M, Zurek, and M, Zyzak
Abstract: We report on the first measurement of the charmed baryon Λ_{c}^{±} production at midrapidity (|y|1) in Au+Au collisions at sqrt[s_{NN}]=200 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider. The Λ_{c}/D^{0} [denoting (Λ_{c}^{+}+Λ_{c}^{-})/(D^{0}+D[over ¯]^{0})] yield ratio is measured to be 1.08±0.16 (stat)±0.26 (sys) in the 0%-20% most central Au+Au collisions for the transverse momentum (p_{T}) range 3p_{T}6 GeV/c. This is significantly larger than the pythia model calculations for p+p collisions. The measured Λ_{c}/D^{0} ratio, as a function of p_{T} and collision centrality, is comparable to the baryon-to-meson ratios for light and strange hadrons in Au+Au collisions. Model calculations including coalescence hadronization for charmed baryon and meson formation reproduce the features of our measured Λ_{c}/D^{0} ratio.
Published: 2020

11. First Determination of the Level Structure of an sd-Shell Hypernucleus, _{Λ}^{19}F

Author: S B, Yang, J K, Ahn, Y, Akazawa, K, Aoki, N, Chiga, H, Ekawa, P, Evtoukhovitch, A, Feliciello, M, Fujita, S, Hasegawa, S, Hayakawa, T, Hayakawa, R, Honda, K, Hosomi, S H, Hwang, N, Ichige, Y, Ichikawa, M, Ikeda, K, Imai, S, Ishimoto, S, Kanatsuki, S H, Kim, S, Kinbara, K, Kobayashi, T, Koike, J Y, Lee, K, Miwa, T J, Moon, T, Nagae, Y, Nakada, M, Nakagawa, Y, Ogura, A, Sakaguchi, H, Sako, Y, Sasaki, S, Sato, K, Shirotori, H, Sugimura, S, Suto, S, Suzuki, T, Takahashi, H, Tamura, K, Tanida, Y, Togawa, Z, Tsamalaidze, M, Ukai, T F, Wang, and T O, Yamamoto
Abstract: We report on the first observation of γ rays emitted from an sd-shell hypernucleus, _{Λ}^{19}F. The energy spacing between the ground state doublet, 1/2^{+} and 3/2^{+} states, of _{Λ}^{19}F is determined to be 315.5±0.4(stat)_{-0.5}^{+0.6}(syst) keV by measuring the γ-ray energy of the M1(3/2^{+}→1/2^{+}) transition. In addition, three γ-ray peaks are observed and assigned as E2(5/2^{+}→1/2^{+}), E1(1/2^{-}→1/2^{+}), and E1(1/2^{-}→3/2^{+}) transitions. The excitation energies of the 5/2^{+} and 1/2^{-} states are determined to be 895.2±0.3(stat)±0.5(syst) and 1265.6±1.2(stat)_{-0.5}^{+0.7}(syst) keV, respectively. It is found that the ground state doublet spacing is well described by theoretical models based on existing s- and p-shell hypernuclear data.
Published: 2018

12. Measurements of Multiparticle Correlations in d+Au Collisions at 200, 62.4, 39, and 19.6 GeV and p+Au Collisions at 200 GeV and Implications for Collective Behavior

Author: C, Aidala, Y, Akiba, M, Alfred, V, Andrieux, K, Aoki, N, Apadula, H, Asano, C, Ayuso, B, Azmoun, V, Babintsev, A, Bagoly, N S, Bandara, K N, Barish, S, Bathe, A, Bazilevsky, M, Beaumier, R, Belmont, A, Berdnikov, Y, Berdnikov, D S, Blau, M, Boer, J S, Bok, M L, Brooks, J, Bryslawskyj, V, Bumazhnov, C, Butler, S, Campbell, V, Canoa Roman, R, Cervantes, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, Z, Citron, M, Connors, N, Cronin, M, Csanád, T, Csörgő, T W, Danley, M S, Daugherity, G, David, K, DeBlasio, K, Dehmelt, A, Denisov, A, Deshpande, E J, Desmond, A, Dion, D, Dixit, J H, Do, A, Drees, K A, Drees, M, Dumancic, J M, Durham, A, Durum, T, Elder, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, W, Fan, N, Feege, D E, Fields, M, Finger, S L, Fokin, J E, Frantz, A, Franz, A D, Frawley, Y, Fukuda, C, Gal, P, Gallus, P, Garg, H, Ge, F, Giordano, Y, Goto, N, Grau, S V, Greene, M, Grosse Perdekamp, T, Gunji, H, Guragain, T, Hachiya, J S, Haggerty, K I, Hahn, H, Hamagaki, H F, Hamilton, S Y, Han, J, Hanks, S, Hasegawa, T O S, Haseler, X, He, T K, Hemmick, J C, Hill, K, Hill, A, Hodges, R S, Hollis, K, Homma, B, Hong, T, Hoshino, N, Hotvedt, J, Huang, S, Huang, K, Imai, J, Imrek, M, Inaba, A, Iordanova, D, Isenhower, Y, Ito, D, Ivanishchev, B V, Jacak, M, Jezghani, Z, Ji, X, Jiang, B M, Johnson, V, Jorjadze, D, Jouan, D S, Jumper, J H, Kang, D, Kapukchyan, S, Karthas, D, Kawall, A V, Kazantsev, V, Khachatryan, A, Khanzadeev, C, Kim, D J, Kim, E-J, Kim, M, Kim, M H, Kim, D, Kincses, E, Kistenev, J, Klatsky, P, Kline, T, Koblesky, D, Kotov, S, Kudo, K, Kurita, Y, Kwon, J G, Lajoie, E O, Lallow, A, Lebedev, S, Lee, S H, Lee, M J, Leitch, Y H, Leung, N A, Lewis, X, Li, S H, Lim, L D, Liu, M X, Liu, V-R, Loggins, S, Lökös, K, Lovasz, D, Lynch, T, Majoros, Y I, Makdisi, M, Makek, M, Malaev, V I, Manko, E, Mannel, H, Masuda, M, McCumber, P L, McGaughey, D, McGlinchey, C, McKinney, M, Mendoza, W J, Metzger, A C, Mignerey, D E, Mihalik, A, Milov, D K, Mishra, J T, Mitchell, G, Mitsuka, S, Miyasaka, S, Mizuno, P, Montuenga, T, Moon, D P, Morrison, S I M, Morrow, T, Murakami, J, Murata, K, Nagai, K, Nagashima, T, Nagashima, J L, Nagle, M I, Nagy, I, Nakagawa, H, Nakagomi, K, Nakano, C, Nattrass, T, Niida, R, Nouicer, T, Novák, N, Novitzky, R, Novotny, A S, Nyanin, E, O'Brien, C A, Ogilvie, J D, Orjuela Koop, J D, Osborn, A, Oskarsson, G J, Ottino, K, Ozawa, V, Pantuev, V, Papavassiliou, J S, Park, S, Park, S F, Pate, M, Patel, W, Peng, D V, Perepelitsa, G D N, Perera, D Yu, Peressounko, C E, PerezLara, J, Perry, R, Petti, M, Phipps, C, Pinkenburg, R P, Pisani, A, Pun, M L, Purschke, P V, Radzevich, K F, Read, D, Reynolds, V, Riabov, Y, Riabov, D, Richford, T, Rinn, S D, Rolnick, M, Rosati, Z, Rowan, J, Runchey, A S, Safonov, T, Sakaguchi, H, Sako, V, Samsonov, M, Sarsour, K, Sato, S, Sato, B, Schaefer, B K, Schmoll, K, Sedgwick, R, Seidl, A, Sen, R, Seto, A, Sexton, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, T, Shioya, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, B K, Singh, C P, Singh, V, Singh, M J, Skoby, M, Slunečka, K L, Smith, M, Snowball, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, S P, Stoll, T, Sugitate, A, Sukhanov, T, Sumita, J, Sun, S, Syed, J, Sziklai, A, Takeda, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, G, Tarnai, R, Tieulent, A, Timilsina, T, Todoroki, M, Tomášek, C L, Towell, R S, Towell, I, Tserruya, Y, Ueda, B, Ujvari, H W, van Hecke, S, Vazquez-Carson, J, Velkovska, M, Virius, V, Vrba, N, Vukman, X R, Wang, Z, Wang, Y, Watanabe, Y S, Watanabe, C P, Wong, C L, Woody, C, Xu, Q, Xu, L, Xue, S, Yalcin, Y L, Yamaguchi, H, Yamamoto, A, Yanovich, P, Yin, J H, Yoo, I, Yoon, H, Yu, I E, Yushmanov, W A, Zajc, A, Zelenski, S, Zharko, and L, Zou
Abstract: Recently, multiparticle-correlation measurements of relativistic p/d/^{3}He+Au, p+Pb, and even p+p collisions show surprising collective signatures. Here, we present beam-energy-scan measurements of two-, four-, and six-particle angular correlations in d+Au collisions at sqrt[s_{NN}]=200, 62.4, 39, and 19.6 GeV. We also present measurements of two- and four-particle angular correlations in p+Au collisions at sqrt[s_{NN}]=200 GeV. We find the four-particle cumulant to be real valued for d+Au collisions at all four energies. We also find that the four-particle cumulant in p+Au has the opposite sign as that in d+Au. Further, we find that the six-particle cumulant agrees with the four-particle cumulant in d+Au collisions at 200 GeV, indicating that nonflow effects are subdominant. These observations provide strong evidence that the correlations originate from the initial geometric configuration, which is then translated into the momentum distribution for all particles, commonly referred to as collectivity.
Published: 2017

13. Centrality-Dependent Modification of Jet-Production Rates in Deuteron-Gold Collisions at √[s(NN)]=200 GeV

Author: A, Adare, C, Aidala, N N, Ajitanand, Y, Akiba, H, Al-Bataineh, J, Alexander, M, Alfred, A, Angerami, K, Aoki, N, Apadula, Y, Aramaki, H, Asano, E T, Atomssa, R, Averbeck, T C, Awes, B, Azmoun, V, Babintsev, M, Bai, G, Baksay, L, Baksay, N S, Bandara, B, Bannier, K N, Barish, B, Bassalleck, A T, Basye, S, Bathe, V, Baublis, C, Baumann, A, Bazilevsky, M, Beaumier, S, Beckman, S, Belikov, R, Belmont, R, Bennett, A, Berdnikov, Y, Berdnikov, J H, Bhom, D S, Blau, J S, Bok, K, Boyle, M L, Brooks, J, Bryslawskyj, H, Buesching, V, Bumazhnov, G, Bunce, S, Butsyk, S, Campbell, A, Caringi, C-H, Chen, C Y, Chi, M, Chiu, I J, Choi, J B, Choi, R K, Choudhury, P, Christiansen, T, Chujo, P, Chung, O, Chvala, V, Cianciolo, Z, Citron, B A, Cole, Z, Conesa Del Valle, M, Connors, M, Csanád, T, Csörgő, T, Dahms, S, Dairaku, I, Danchev, T W, Danley, K, Das, A, Datta, M S, Daugherity, G, David, M K, Dayananda, K, DeBlasio, K, Dehmelt, A, Denisov, A, Deshpande, E J, Desmond, K V, Dharmawardane, O, Dietzsch, A, Dion, P B, Diss, J H, Do, M, Donadelli, L, D'Orazio, O, Drapier, A, Drees, K A, Drees, J M, Durham, A, Durum, D, Dutta, S, Edwards, Y V, Efremenko, F, Ellinghaus, T, Engelmore, A, Enokizono, H, En'yo, S, Esumi, B, Fadem, N, Feege, D E, Fields, M, Finger, F, Fleuret, S L, Fokin, Z, Fraenkel, J E, Frantz, A, Franz, A D, Frawley, K, Fujiwara, Y, Fukao, T, Fusayasu, C, Gal, P, Gallus, P, Garg, I, Garishvili, H, Ge, F, Giordano, A, Glenn, H, Gong, M, Gonin, Y, Goto, R, Granier de Cassagnac, N, Grau, S V, Greene, G, Grim, M, Grosse Perdekamp, T, Gunji, H-Å, Gustafsson, T, Hachiya, J S, Haggerty, K I, Hahn, H, Hamagaki, J, Hamblen, H F, Hamilton, R, Han, S Y, Han, J, Hanks, S, Hasegawa, T O S, Haseler, K, Hashimoto, E, Haslum, R, Hayano, X, He, M, Heffner, T K, Hemmick, T, Hester, J C, Hill, M, Hohlmann, R S, Hollis, W, Holzmann, K, Homma, B, Hong, T, Horaguchi, D, Hornback, T, Hoshino, N, Hotvedt, J, Huang, S, Huang, T, Ichihara, R, Ichimiya, Y, Ikeda, K, Imai, M, Inaba, A, Iordanova, D, Isenhower, M, Ishihara, M, Issah, D, Ivanishchev, Y, Iwanaga, B V, Jacak, M, Jezghani, J, Jia, X, Jiang, J, Jin, B M, Johnson, T, Jones, K S, Joo, D, Jouan, D S, Jumper, F, Kajihara, J, Kamin, S, Kanda, J H, Kang, J, Kapustinsky, K, Karatsu, M, Kasai, D, Kawall, M, Kawashima, A V, Kazantsev, T, Kempel, J A, Key, V, Khachatryan, A, Khanzadeev, K M, Kijima, J, Kikuchi, A, Kim, B I, Kim, C, Kim, D J, Kim, E-J, Kim, G W, Kim, M, Kim, Y-J, Kim, B, Kimelman, E, Kinney, Á, Kiss, E, Kistenev, R, Kitamura, J, Klatsky, D, Kleinjan, P, Kline, T, Koblesky, L, Kochenda, B, Komkov, M, Konno, J, Koster, D, Kotov, A, Král, A, Kravitz, G J, Kunde, K, Kurita, M, Kurosawa, Y, Kwon, G S, Kyle, R, Lacey, Y S, Lai, J G, Lajoie, A, Lebedev, D M, Lee, J, Lee, K B, Lee, K S, Lee, S, Lee, S H, Lee, M J, Leitch, M A L, Leite, X, Li, P, Lichtenwalner, P, Liebing, S H, Lim, L A, Linden Levy, T, Liška, H, Liu, M X, Liu, B, Love, D, Lynch, C F, Maguire, Y I, Makdisi, M, Makek, M D, Malik, A, Manion, V I, Manko, E, Mannel, Y, Mao, H, Masui, F, Matathias, M, McCumber, P L, McGaughey, D, McGlinchey, C, McKinney, N, Means, A, Meles, M, Mendoza, B, Meredith, Y, Miake, T, Mibe, A C, Mignerey, K, Miki, A, Milov, D K, Mishra, J T, Mitchell, S, Miyasaka, S, Mizuno, A K, Mohanty, P, Montuenga, H J, Moon, T, Moon, Y, Morino, A, Morreale, D P, Morrison, T V, Moukhanova, T, Murakami, J, Murata, A, Mwai, S, Nagamiya, K, Nagashima, J L, Nagle, M, Naglis, M I, Nagy, I, Nakagawa, H, Nakagomi, Y, Nakamiya, K R, Nakamura, T, Nakamura, K, Nakano, S, Nam, C, Nattrass, P K, Netrakanti, J, Newby, M, Nguyen, M, Nihashi, T, Niida, S, Nishimura, R, Nouicer, T, Novák, N, Novitzky, A S, Nyanin, C, Oakley, E, O'Brien, S X, Oda, C A, Ogilvie, M, Oka, K, Okada, Y, Onuki, J D, Orjuela Koop, J D, Osborn, A, Oskarsson, M, Ouchida, K, Ozawa, R, Pak, V, Pantuev, V, Papavassiliou, I H, Park, J S, Park, S, Park, S K, Park, W J, Park, S F, Pate, M, Patel, H, Pei, J-C, Peng, H, Pereira, D V, Perepelitsa, G D N, Perera, D Yu, Peressounko, J, Perry, R, Petti, C, Pinkenburg, R, Pinson, R P, Pisani, M, Proissl, M L, Purschke, H, Qu, J, Rak, B J, Ramson, I, Ravinovich, K F, Read, S, Rembeczki, K, Reygers, D, Reynolds, V, Riabov, Y, Riabov, E, Richardson, T, Rinn, D, Roach, G, Roche, S D, Rolnick, M, Rosati, C A, Rosen, S S E, Rosendahl, Z, Rowan, J G, Rubin, P, Ružička, B, Sahlmueller, N, Saito, T, Sakaguchi, K, Sakashita, H, Sako, V, Samsonov, S, Sano, M, Sarsour, S, Sato, T, Sato, S, Sawada, B, Schaefer, B K, Schmoll, K, Sedgwick, J, Seele, R, Seidl, A, Sen, R, Seto, P, Sett, A, Sexton, D, Sharma, I, Shein, T-A, Shibata, K, Shigaki, M, Shimomura, K, Shoji, P, Shukla, A, Sickles, C L, Silva, D, Silvermyr, C, Silvestre, K S, Sim, B K, Singh, C P, Singh, V, Singh, M, Slunečka, M, Snowball, R A, Soltz, W E, Sondheim, S P, Sorensen, I V, Sourikova, P W, Stankus, E, Stenlund, M, Stepanov, S P, Stoll, T, Sugitate, A, Sukhanov, T, Sumita, J, Sun, J, Sziklai, E M, Takagui, A, Taketani, R, Tanabe, Y, Tanaka, S, Taneja, K, Tanida, M J, Tannenbaum, S, Tarafdar, A, Taranenko, H, Themann, D, Thomas, T L, Thomas, R, Tieulent, A, Timilsina, T, Todoroki, M, Togawa, A, Toia, L, Tomášek, M, Tomášek, H, Torii, C L, Towell, R, Towell, R S, Towell, I, Tserruya, Y, Tsuchimoto, C, Vale, H, Valle, H W, van Hecke, E, Vazquez-Zambrano, A, Veicht, J, Velkovska, R, Vértesi, M, Virius, V, Vrba, E, Vznuzdaev, X R, Wang, D, Watanabe, K, Watanabe, Y, Watanabe, Y S, Watanabe, F, Wei, R, Wei, J, Wessels, A S, White, S N, White, D, Winter, C L, Woody, R M, Wright, M, Wysocki, B, Xia, L, Xue, S, Yalcin, Y L, Yamaguchi, K, Yamaura, R, Yang, A, Yanovich, J, Ying, S, Yokkaichi, J H, Yoo, I, Yoon, Z, You, G R, Young, I, Younus, H, Yu, I E, Yushmanov, W A, Zajc, A, Zelenski, S, Zhou, and L, Zou
Abstract: Jet production rates are measured in p+p and d+Au collisions at sqrt[s_{NN}]=200 GeV recorded in 2008 with the PHENIX detector at the Relativistic Heavy Ion Collider. Jets are reconstructed using the R=0.3 anti-k_{t} algorithm from energy deposits in the electromagnetic calorimeter and charged tracks in multiwire proportional chambers, and the jet transverse momentum (p_{T}) spectra are corrected for the detector response. Spectra are reported for jets with 12p_{T}50 GeV/c, within a pseudorapidity acceptance of |η|0.3. The nuclear-modification factor (R_{dAu}) values for 0%-100% d+Au events are found to be consistent with unity, constraining the role of initial state effects on jet production. However, the centrality-selected R_{dAu} values and central-to-peripheral ratios (R_{CP}) show large, p_{T}-dependent deviations from unity, challenging the conventional models that relate hard-process rates and soft-particle production in collisions involving nuclei.
Published: 2015

14. Freeze-Out Parameters in Central158AGeVP208b+PbCollisions

Author: M. M. Aggarwal, A. Agnihotri, Z. Ahammed, A. L. S. Angelis, V. Antonenko, V. Arefiev, V. Astakhov, V. Avdeitchikov, T. C. Awes, P. V. K. S. Baba, S. K. Badyal, A. Baldine, L. Barabach, C. Barlag, S. Bathe, B. Batiounia, T. Bernier, K. B. Bhalla, V. S. Bhatia, C. Blume, R. Bock, E.-M. Bohne, Z. K. Böröcz, D. Bucher, A. Buijs, H. Büsching, L. Carlen, V. Chalyshev, S. Chattopadhyay, R. Cherbatchev, T. Chujo, A. Claussen, A. C. Das, M. P. Decowski, H. Delagrange, V. Djordjadze, P. Donni, I. Doubovik, S. Dutt, M. R. Dutta Majumdar, K. El Chenawi, S. Eliseev, K. Enosawa, P. Foka, S. Fokin, V. Frolov, M. S. Ganti, S. Garpman, O. Gavrishchuk, F. J. M. Geurts, T. K. Ghosh, R. Glasow, S. K. Gupta, B. Guskov, H. Å. Gustafsson, H. H. Gutbrod, R. Higuchi, I. Hrivnacova, M. Ippolitov, H. Kalechofsky, R. Kamermans, K.-H. Kampert, K. Karadjev, K. Karpio, S. Kato, S. Kees, H. Kim, B. W. Kolb, I. Kosarev, I. Koutcheryaev, T. Krümpel, A. Kugler, P. Kulinich, M. Kurata, K. Kurita, N. Kuzmin, I. Langbein, A. Lebedev, Y. Y. Lee, H. Löhner, L. Luquin, D. P. Mahapatra, V. Manko, M. Martin, G. Martínez, A. Maximov, R. Mehdiyev, G. Mgebrichvili, Y. Miake, D. Mikhalev, Md. F. Mir, G. C. Mishra, Y. Miyamoto, D. Morrison, D. S. Mukhopadhyay, V. Myalkovski, H. Naef, B. K. Nandi, S. K. Nayak, T. K. Nayak, S. Neumaier, A. Nianine, V. Nikitine, S. Nikolaev, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, F. E. Obenshain, A. Oskarsson, I. Otterlund, M. Pachr, A. Parfenov, S. Pavliouk, T. Peitzmann, V. Petracek, F. Plasil, W. Pinganaud, M. L. Purschke, B. Raeven, J. Rak, R. Raniwala, S. Raniwala, V. S. Ramamurthy, N. K. Rao, F. Retiere, K. Reygers, G. Roland, L. Rosselet, I. Roufanov, C. Roy, J. M. Rubio, H. Sako, S. S. Sambyal, R. Santo, S. Sato, H. Schlagheck, H.-R. Schmidt, Y. Schutz, G. Shabratova, T. H. Shah, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B. C. Sinha, N. Slavine, K. Söderström, N. Solomey, S. P. Sørensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, D. Stüken, M. Sumbera, T. Svensson, M. D. Trivedi, A. Tsvetkov, L. Tykarski, J. Urbahn, E. C. v. d. Pijll, N. v. Eijndhoven, G. J. v. Nieuwenhuizen, A. Vinogradov, Y. P. Viyogi, A. Vodopianov, S. Vörös, B. Wysłouch, K. Yagi, Y. Yokota, and G. R. Young
Subjects: Nuclear reaction, Physics, Meson, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Super Proton Synchrotron, Nuclear physics, Pion, Mass spectrum, Transverse mass, Atomic physics, Nuclear Experiment
Abstract: Neutral pion production in central 158A GeV [sup 208]Pb+ [sup 208] Pb collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron. The [pi][sup 0] transverse mass spectrum has been analyzed in terms of a thermal model with hydrodynamic expansion. The high accuracy and large kinematic coverage of the measurement allow one to limit previously noted ambiguities in the extracted freeze-out parameters. The results are shown to be sensitive to the shape of the velocity distribution at freeze-out. [copyright] [ital 1999] [ital The American Physical Society ]
Published: 1999

15. Centrality Dependence of Neutral Pion Production in158AGeVP208b+P208bCollisions

Author: M. M. Aggarwal, A. Agnihotri, Z. Ahammed, A. L. S. Angelis, V. Antonenko, V. Arefiev, V. Astakhov, V. Avdeitchikov, T. C. Awes, P. V. K. S. Baba, S. K. Badyal, A. Baldine, L. Barabach, C. Barlag, S. Bathe, B. Batiounia, T. Bernier, K. B. Bhalla, V. S. Bhatia, C. Blume, R. Bock, E.-M. Bohne, Z. K. Böröcz, D. Bucher, A. Buijs, H. Büsching, L. Carlen, V. Chalyshev, S. Chattopadhyay, R. Cherbatchev, T. Chujo, A. Claussen, A. C. Das, M. P. Decowski, V. Djordjadze, P. Donni, I. Doubovik, M. R. Dutta Majumdar, K. El Chenawi, S. Eliseev, K. Enosawa, P. Foka, S. Fokin, V. Frolov, M. S. Ganti, S. Garpman, O. Gavrishchuk, F. J. M. Geurts, T. K. Ghosh, R. Glasow, S. K. Gupta, B. Guskov, H. A. Gustafsson, H. H. Gutbrod, R. Higuchi, I. Hrivnacova, M. Ippolitov, H. Kalechofsky, R. Kamermans, K.-H. Kampert, K. Karadjev, K. Karpio, S. Kato, S. Kees, H. Kim, B. W. Kolb, I. Kosarev, I. Koutcheryaev, T. Krümpel, A. Kugler, P. Kulinich, M. Kurata, K. Kurita, N. Kuzmin, I. Langbein, A. Lebedev, Y. Y. Lee, H. Löhner, L. Luquin, D. P. Mahapatra, V. Manko, M. Martin, A. Maximov, R. Mehdiyev, G. Mgebrichvili, Y. Miake, D. Mikhalev, G. C. Mishra, Y. Miyamoto, D. Morrison, D. S. Mukhopadhyay, V. Myalkovski, H. Naef, B. K. Nandi, S. K. Nayak, T. K. Nayak, S. Neumaier, A. Nianine, V. Nikitine, S. Nikolaev, P. Nilsson, S. Nishimura, P. Nomokonov, J. Nystrand, F. E. Obenshain, A. Oskarsson, I. Otterlund, M. Pachr, A. Parfenov, S. Pavliouk, T. Pietzmann, V. Patracek, W. Pinanaud, F. Plasil, M. L. Purschke, B. Raeven, J. Rak, R. Raniwala, S. Raniwala, V. S. Ramamurthy, N. K. Rao, F. Retiere, K. Reygers, G. Roland, L. Rosselet, I. Roufanov, C. Roy, J. M. Rubio, H. Sako, S. S. Sambyal, R. Santo, S. Sato, H. Schlagheck, H.-R. Schmidt, G. Shabratova, I. Sibiriak, T. Siemiarczuk, D. Silvermyr, B. C. Sinha, N. Slavine, K. Söderström, N. Solomey, S. P. Sørensen, P. Stankus, G. Stefanek, P. Steinberg, E. Stenlund, D. Stüken, M. Sumbera, T. Svensson, M. D. Trivedi, A. Tsvetkov, C. Twenhöfel, L. Tykarski, J. Urbahn, N. v. Eijndhoven, G. J. v. Nieuwenhuizen, A. Vinogradov, Y. P. Viyogi, A. Vodopianov, S. Vörös, B. Wysłouch, K. Yagi, Y. Yokota, and G. R. Young
Subjects: Nuclear reaction, Physics, Particle physics, Meson, Nuclear Theory, Hadron, General Physics and Astronomy, Elementary particle, Super Proton Synchrotron, Nuclear physics, Pion, Production (computer science), Nuclear Experiment, Nucleon
Abstract: The production of neutral pions in 158A GeV {sup 208}Pb+ {sup 208}Pb collisions has been studied in the WA98 experiment at the CERN Super Proton Synchrotron (SPS). Transverse momentum spectra are studied for the range 0.3{le}m{sub T}{minus}m{sub 0}{le}4.0 GeV /c . The results for central collisions are compared to various models. The centrality dependence of the neutral pion spectral shape and yield is investigated. An invariance of the spectral shape and a simple scaling of the yield with the number of participating nucleons is observed for centralities with greater than about 30thinspthinspparticipating nucleons. This is most naturally explained by assuming an equilibrated system. {copyright} {ital 1998} {ital The American Physical Society }
Published: 1998

16. Antiproton Production inAu+AuCollisions at11.7AGeV/c

Author: Ryugo S. Hayano, J. Chang, Kenta Shigaki, F. Zhu, S. Y. Fung, J. C. Dunlop, H. Sako, J. B. Cumming, L. P. Remsberg, J. H. Kang, S. Nagamiya, Yang Wu, R. A. Soltz, Brian Cole, S. Gushue, K. Kurita, D. R. Beavis, J. Luke, H. Xiang, J.W. Olness, C. Chasman, K. Ashktorab, W. A. Zajc, L. Ahle, J. H. Thomas, Jongmin Lee, T. C. Sangster, E. Garcia, R. Seto, V. Cianciolo, M. D. Baker, S. Ueno-Hayashi, F. Videbæk, C. Muentz, R. R. Debbe, J. Engelage, Y. Y. Chu, J. Shea, S. G. Steadman, C. A. Ogilvie, C. Y. Chi, M. Moulson, G. H. Xu, George Stephans, Yasuo Miake, Fuqiang Wang, E. G. Judd, E. J. Kim, Hideki Hamagaki, Luisa F. Hansen, G. Heintzelman, Z. Chen, H. Yao, W. Eldredge, A. Kumagai, M. J. Tannenbaum, H. J. Crawford, Alice Mignerey, H. C. Britt, Y. Akiba, B. Moskowitz, K. Yagi, and M. N. Namboodiri
Subjects: Physics, Nuclear Theory, Nuclear structure, General Physics and Astronomy, Kinetic energy, Nuclear matter, Nuclear physics, Antiproton, Antimatter, High Energy Physics::Experiment, Atomic physics, Nuclear Experiment, Nucleon, Scaling
Abstract: Antiproton production in 11.7A GeV/c Au+Au collisions over a wide transverse-mass coverage was studied using the AGS-E866 experimental apparatus. The mean transverse kinetic energy increases as a function of centrality and is similar to that of protons. The antiproton yields in Si+Al , Si+Au , and Au+Au collisions are consistent with scaling with the 0.7 power of the number of participant nucleons. Copyright 1998, The American Physical Society
Published: 1998

17. Semihard Scattering Unraveled from Collective Dynamics by Two-Pion Azimuthal Correlations in158A GeV/cPb+AuCollisions

Author: C. Weber, P. Glässel, C. Fuchs, H. Tilsner, I. Ravinovich, C. Voigt, N. Saveljic, H. Appelshäuser, S. Razin, P. Braun-Munzinger, P. Rehak, J. Bielcikova, S. Shimansky, O. Nix, A. Drees, R. Baur, A. Marín, S. Voloshin, W. Schmitz, G. Hering, H. Sako, G. Agakichiev, S. Specht, B. Lenkeit, D. Mikowiec, F. Messer, A. Pfeiffer, J.P. Wessels, M. Messer, E. Socol, J.P. Wurm, S.I. Esumi, Z. Fraenkel, I. Tserruya, V. Petráek, V. Yurevich, A. Cherlin, J. Stachel, Y. Panebrattsev, P. Huovinen, Jovan Milosevic, K. Filimonov, and J. Rak
Subjects: Physics, Particle physics, Scattering, Elliptic flow, Hadron, General Physics and Astronomy, Computer Science::Computation and Language (Computational Linguistics and Natural Language and Speech Processing), Pion, Angular correlation, Saturation (graph theory), Collective dynamics, Atomic physics, Nuclear Experiment, Centrality
Abstract: Elliptic flow and two-particle azimuthal correlations of charged hadrons and high-${p}_{T}$ pions (${p}_{T}g1\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$) have been measured close to midrapidity in $158A\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$ $\mathrm{P}\mathrm{b}+\mathrm{A}\mathrm{u}$ collisions by the CERES experiment. Elliptic flow (${v}_{2}$) rises linearly with ${p}_{T}$ to a value of about $10%$ at $2\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$. Beyond ${p}_{T}\ensuremath{\approx}1.5\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$, the slope decreases considerably, possibly indicating a saturation of ${v}_{2}$ at high ${p}_{T}$. Two-pion azimuthal anisotropies for ${p}_{T}g1.2\text{ }\text{ }\mathrm{G}\mathrm{e}\mathrm{V}/c$ exceed the elliptic flow values by about $60%$ in midcentral collisions. These nonflow contributions are attributed to nearside and back-to-back jetlike correlations, the latter exhibiting centrality dependent broadening.
Published: 2004

18. Semihard scattering unraveled from collective dynamics by two-pion azimuthal correlations in 158A GeV/c Pb+Au collisions

Author: G, Agakichiev, H, Appelshäuser, R, Baur, J, Bielcikova, P, Braun-Munzinger, A, Cherlin, A, Drees, S I, Esumi, K, Filimonov, Z, Fraenkel, Ch, Fuchs, P, Glässel, G, Hering, P, Huovinen, B, Lenkeit, A, Marín, F, Messer, M, Messer, J, Milosevic, D, Miśkowiec, O, Nix, Yu, Panebrattsev, V, Petrácek, A, Pfeiffer, J, Rak, I, Ravinovich, S, Razin, P, Rehak, H, Sako, N, Saveljic, W, Schmitz, S, Shimansky, E, Socol, H J, Specht, J, Stachel, H, Tilsner, I, Tserruya, C, Voigt, S, Voloshin, C, Weber, J P, Wessels, J P, Wurm, and V, Yurevich
Abstract: Elliptic flow and two-particle azimuthal correlations of charged hadrons and high-p(T) pions (p(T)1 GeV/c) have been measured close to midrapidity in 158A GeV/c Pb+Au collisions by the CERES experiment. Elliptic flow (v(2)) rises linearly with p(T) to a value of about 10% at 2 GeV/c. Beyond p(T) approximately 1.5 GeV/c, the slope decreases considerably, possibly indicating a saturation of v(2) at high p(T). Two-pion azimuthal anisotropies for p(T)1.2 GeV/c exceed the elliptic flow values by about 60% in midcentral collisions. These nonflow contributions are attributed to nearside and back-to-back jetlike correlations, the latter exhibiting centrality dependent broadening.
Published: 2003

19. Universal Pion Freeze-Out in Heavy-Ion Collisions

Author: V. Yurevich, V. Petracek, L. Dietrich, S. Yurevich, J. Schukraft, H. J. Specht, S. I. Esumi, S. Damjanovic, H. Tilsner, J. Slivova, S. Sedykh, I. Ravinovich, A. Marin, P. Glässel, I. Tserruya, K. Fomenko, H. Appelshäuser, A. Castillo, H. Sako, K. Filimonov, Z. Fraenkel, W. Ludolphs, A. Cherlin, Jovan Milosevic, P. Braun-Munzinger, O. Petchenova, J. Stachel, T. Dietel, B. Lenkeit, A. Drees, A. Milov, T. Wienold, Wenhui Xie, Andreas Pfeiffer, G. Agakichiev, G. Hering, B. Windelband, D. Miskowiec, J. Holeczek, Y. Panebrattsev, V. Kushpil, J.P. Wurm, C. Garabatos, J. Rak, D. Adamova, V. Belaga, W. Schmitz, P. Rehak, A. Maas, J. P. Wessels, M. Sumbera, and S. Shimansky
Subjects: Physics, Particle physics, Meson, Mean free path, Nuclear Theory, Hadron, FOS: Physical sciences, General Physics and Astronomy, Elementary particle, Alternating Gradient Synchrotron, Nuclear physics, Pion, Path length, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Nuclear Experiment, Relativistic Heavy Ion Collider
Abstract: Based on an evaluation of data on pion interferometry and on particle yields at mid-rapidity, we propose a universal condition for thermal freeze-out of pions in heavy-ion collisions. We show that freeze-out occurs when the mean free path of pions lambda_f reaches a value of about 1 fm, which is much smaller than the spatial extent of the system at freeze-out. This critical mean free path is independent of the centrality of the collision and beam energy from AGS to RHIC., 5 pages, 3 figures, revised version resubmitted to PRL
Published: 2003

20. Measurement of Lambda and Lambda(macro) particles in Au+Au collisions at the square root of S(NN) = 130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, el-Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, D, Mukhopadhyay, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, D, Pal, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, Van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: We present results on the measurement of Lambda and Lambda(macro) production in Au+Au collisions at square root of (S (NN) = 130 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. The transverse momentum spectra were measured for minimum bias and for the 5% most central events. The Lambda;/Lambda ratios are constant as a function of p(T) and the number of participants. The measured net Lambda density is significantly larger than predicted by models based on hadronic strings (e.g., HIJING) but in approximate agreement with models which include the gluon-junction mechanism.
Published: 2002

21. Flow measurements via two-particle azimuthal correlations in Au + Au collisions at sqrt [s(NN)]=130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M Grosse, Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, Van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Two-particle azimuthal correlation functions are presented for charged hadrons produced in Au+Au collisions at the Relativistic Heavy Ion Collider (sqrt [s(NN)]=130 GeV). The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values (v2) show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone epsilon, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low p(T). A breakdown of this epsilon scaling is observed for charged hadrons with pT1.0 GeV/c.
Published: 2002

22. Net charge fluctuations in Au + Au interactions at sqrt[s(NN)]=130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Data from Au + Au interactions at sqrt[s(NN)]=130 GeV, obtained with the PHENIX detector at the Relativistic Heavy-Ion Collider, are used to investigate local net charge fluctuations among particles produced near midrapidity. According to recent suggestions, such fluctuations may carry information from the quark-gluon plasma. This analysis shows that the fluctuations are dominated by a stochastic distribution of particles, but are also sensitive to other effects, like global charge conservation and resonance decays.
Published: 2002

23. Measurement of single electrons and implications for charm production in Au+Au collisions at square root[s(NN)] = 130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, T, Hachiya, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, Van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Transverse momentum spectra of electrons from Au+Au collisions at square root[s(NN)] = 130 GeV have been measured at midrapidity by the PHENIX experiment at the Relativistic Heavy Ion Collider. The spectra show an excess above the background from photon conversions and light hadron decays. The electron signal is consistent with that expected from semileptonic decays of charm. The yield of the electron signal dN(e)/dy for p(T)0.8 GeV/c is 0.025+/-0.004(stat)+/-0.010(syst) in central collisions, and the corresponding charm cross section is 380+/-60(stat)+/-200(syst) microb per binary nucleon-nucleon collision.
Published: 2002

24. Transverse-mass dependence of two-pion correlations in Au+Au collisions at square root[s(NN)] = 130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, A, Enokizono, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, Van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Two-pion correlations in square root[s(NN)] = 130 GeV Au+Au collisions at RHIC have been measured over a broad range of pair transverse momentum k(T) by the PHENIX experiment at RHIC. The k(T) dependent transverse radii are similar to results from heavy-ion collisions at square root[s(NN)] = 4.1, 4.9, and 17.3 GeV, whereas the longitudinal radius increases monotonically with beam energy. The ratio of the outwards to sidewards transverse radii (R(out)/R(side)) is consistent with unity and independent of k(T).
Published: 2002

25. Centrality dependence of pi(+/-), K(+/-), p, and (-)p production from sqrt[s(NN)] = 130 GeV Au + Au collisions at RHIC

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Identified pi(+/-), K(+/-), p, and (-)p transverse momentum spectra at midrapidity in sqrt[s(NN)] = 130 GeV Au+Au collisions were measured by the PHENIX experiment at RHIC as a function of collision centrality. Average transverse momenta increase with the number of participating nucleons in a similar way for all particle species. Within errors, all midrapidity particle yields per participant are found to be increasing with the number of participating nucleons. There is an indication that K(+/-), p, and (-)p yields per participant increase faster than the pi(+/-) yields. In central collisions at high transverse momenta (p(T)or =2 GeV/c), (-)p and p yields are comparable to the pi(+/-) yields.
Published: 2001

26. Suppression of hadrons with large transverse momentum in central Au+Au collisions at root square[s(NN)] = 130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S-Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H-A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, V, Kochetkov, D, Koehler, T, Kohama, D, Kotchetkov, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P T, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T-A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: Transverse momentum spectra for charged hadrons and for neutral pions in the range 1 GeV/cp(T)5 GeV/c have been measured by the PHENIX experiment at RHIC in Au+Au collisions at root square[s(NN)] = 130 GeV. At high p(T) the spectra from peripheral nuclear collisions are consistent with scaling the spectra from p+p collisions by the average number of binary nucleon-nucleon collisions. The spectra from central collisions are significantly suppressed when compared to the binary-scaled p+p expectation, and also when compared to similarly binary-scaled peripheral collisions, indicating a novel nuclear-medium effect in central nuclear collisions at RHIC energies.
Published: 2001

27. Measurement of the midrapidity transverse energy distribution from square root of [(s)NN] = 130 GeV Au + Au collisions at RHIC

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J M, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, D, Kochetkov, V, Kochetkov, D, Koehler, T, Kohama, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: The first measurement of energy produced transverse to the beam direction at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory is presented. The midrapidity transverse energy density per participating nucleon rises steadily with the number of participants, closely paralleling the rise in charged-particle density, such thatE(T)/N(ch)remains relatively constant as a function of centrality. The energy density calculated via Bjorken's prescription for the 2% most central Au+Au collisions at square root[s(NN)] = 130 GeV is at least epsilon(Bj) = 4.6 GeV/fm(3), which is a factor of 1.6 larger than found at sqrt[s(NN)] = 17.2 GeV ( Pb+Pb at CERN).
Published: 2001

28. Centrality dependence of charged particle multiplicity in Au-Au collisions at square root of (s)NN = 130 GeV

Author: K, Adcox, S S, Adler, N N, Ajitanand, Y, Akiba, J, Alexander, L, Aphecetche, Y, Arai, S H, Aronson, R, Averbeck, T C, Awes, K N, Barish, P D, Barnes, J, Barrette, B, Bassalleck, S, Bathe, V, Baublis, A, Bazilevsky, S, Belikov, F G, Bellaiche, S T, Belyaev, M J, Bennett, Y, Berdnikov, S, Botelho, M L, Brooks, D S, Brown, N, Bruner, D, Bucher, H, Buesching, V, Bumazhnov, G, Bunce, J, Burward-Hoy, S, Butsyk, T A, Carey, P, Chand, J, Chang, W C, Chang, L L, Chavez, S, Chernichenko, C Y, Chi, J, Chiba, M, Chiu, R K, Choudhury, T, Christ, T, Chujo, M S, Chung, P, Chung, V, Cianciolo, B A, Cole, D G, D'Enterria, G, David, H, Delagrange, A, Denisov, A, Deshpande, E J, Desmond, O, Dietzsch, B V, Dinesh, A, Drees, A, Durum, D, Dutta, K, Ebisu, Y V, Efremenko, K, El Chenawi, H, En'yo, S, Esumi, L, Ewell, T, Ferdousi, D E, Fields, S L, Fokin, Z, Fraenkel, A, Franz, A D, Frawley, S Y, Fung, S, Garpman, T K, Ghosh, A, Glenn, A L, Godoi, Y, Goto, S V, Greene, M, Grosse Perdekamp, S K, Gupta, W, Guryn, H A, Gustafsson, J S, Haggerty, H, Hamagaki, A G, Hansen, H, Hara, E P, Hartouni, R, Hayano, N, Hayashi, X, He, T K, Hemmick, J, Heuser, M, Hibino, J C, Hill, D S, Ho, K, Homma, B, Hong, A, Hoover, T, Ichihara, K, Imai, M S, Ippolitov, M, Ishihara, B V, Jacak, W Y, Jang, J, Jia, B M, Johnson, S C, Johnson, K S, Joo, S, Kametani, J H, Kang, M, Kann, S S, Kapoor, S, Kelly, B, Khachaturov, A, Khanzadeev, J, Kikuchi, D J, Kim, H J, Kim, S Y, Kim, Y G, Kim, W W, Kinnison, E, Kistenev, A, Kiyomichi, C, Klein-Boesing, S, Klinksiek, L, Kochenda, D, Kochetkov, V, Kochetkov, D, Koehler, T, Kohama, A, Kozlov, P J, Kroon, K, Kurita, M J, Kweon, Y, Kwon, G S, Kyle, R, Lacey, J G, Lajoie, J, Lauret, A, Lebedev, D M, Lee, M J, Leitch, X H, Li, Z, Li, D J, Lim, M X, Liu, X, Liu, Z, Liu, C F, Maguire, J, Mahon, Y I, Makdisi, V I, Manko, Y, Mao, S K, Mark, S, Markacs, G, Martinez, M D, Marx, A, Masaike, F, Matathias, T, Matsumoto, P L, McGaughey, E, Melnikov, M, Merschmeyer, F, Messer, M, Messer, Y, Miake, T E, Miller, A, Milov, S, Mioduszewski, R E, Mischke, G C, Mishra, J T, Mitchell, A K, Mohanty, D P, Morrison, J M, Moss, F, Mühlbacher, M, Muniruzzaman, J, Murata, S, Nagamiya, Y, Nagasaka, J L, Nagle, Y, Nakada, B K, Nandi, J, Newby, L, Nikkinen, P, Nilsson, S, Nishimura, A S, Nyanin, J, Nystrand, E, O'Brien, C A, Ogilvie, H, Ohnishi, I D, Ojha, M, Ono, V, Onuchin, A, Oskarsson, L, Osterman, I, Otterlund, K, Oyama, L, Paffrath, A P, Palounek, V S, Pantuev, V, Papavassiliou, S F, Pate, T, Peitzmann, A N, Petridis, C, Pinkenburg, R P, Pisani, P, Pitukhin, F, Plasil, M, Pollack, K, Pope, M L, Purschke, I, Ravinovich, K F, Read, K, Reygers, V, Riabov, Y, Riabov, M, Rosati, A A, Rose, S S, Ryu, N, Saito, A, Sakaguchi, T, Sakaguchi, H, Sako, T, Sakuma, V, Samsonov, T C, Sangster, R, Santo, H D, Sato, S, Sato, S, Sawada, B R, Schlei, Y, Schutz, V, Semenov, R, Seto, T K, Shea, I, Shein, T A, Shibata, K, Shigaki, T, Shiina, Y H, Shin, I G, Sibiriak, D, Silvermyr, K S, Sim, J, Simon-Gillo, C P, Singh, V, Singh, M, Sivertz, A, Soldatov, R A, Soltz, S, Sorensen, P W, Stankus, N, Starinsky, P, Steinberg, E, Stenlund, A, Ster, S P, Stoll, M, Sugioka, T, Sugitate, J P, Sullivan, Y, Sumi, Z, Sun, M, Suzuki, E M, Takagui, A, Taketani, M, Tamai, K H, Tanaka, Y, Tanaka, E, Taniguchi, M J, Tannenbaum, J, Thomas, J H, Thomas, T L, Thomas, W, Tian, J, Tojo, H, Torii, R S, Towell, I, Tserruya, H, Tsuruoka, A A, Tsvetkov, S K, Tuli, H, Tydesjö, N, Tyurin, T, Ushiroda, H W, van Hecke, C, Velissaris, J, Velkovska, M, Velkovsky, A A, Vinogradov, M A, Volkov, A, Vorobyov, E, Vznuzdaev, H, Wang, Y, Watanabe, S N, White, C, Witzig, F K, Wohn, C L, Woody, W, Xie, K, Yagi, S, Yokkaichi, G R, Young, I E, Yushmanov, W A, Zajc, Z, Zhang, and S, Zhou
Abstract: We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at square root of [s(NN)] = 130 GeV measured with the PHENIX detector at RHIC. For the 5% most central collisions we find dN(ch)/d eta(vertical line eta = 0) = 622+/-1(stat)+/-41(syst). The results, analyzed as a function of centrality, show a steady rise of the particle density per participating nucleon with centrality.
Published: 2000

29. Three-pion interferometry results from central Pb+Pb collisions at 158A GeV/c

Author: M M, Aggarwal, A, Agnihotri, Z, Ahammed, A L, Angelis, V, Antonenko, V, Arefiev, V, Astakhov, V, Avdeitchikov, T C, Awes, P V, Baba, S K, Badyal, C, Barlag, S, Bathe, B, Batiounia, T, Bernier, K B, Bhalla, V S, Bhatia, C, Blume, R, Bock, E M, Bohne, Z, Böröcz, D, Bucher, A, Buijs, H, Büsching, L, Carlen, V, Chalyshev, S, Chattopadhyay, R, Cherbatchev, T, Chujo, A, Claussen, A C, Das, M P, Decowski, H, Delagrange, V, Djordjadze, P, Donni, I, Doubovik, S, Dutt, M R, Dutta Majumdar, K, El Chenawi, S, Eliseev, K, Enosawa, P, Foka, S, Fokin, M S, Ganti, S, Garpman, O, Gavrishchuk, F J, Geurts, T K, Ghosh, R, Glasow, S K, Gupta, B, Guskov, H A, Gustafsson, H H, Gutbrod, R, Higuchi, I, Hrivnacova, M, Ippolitov, H, Kalechofsky, R, Kamermans, K H, Kampert, K, Karadjev, K, Karpio, S, Kato, S, Kees, C, Klein-Bösing, S, Knoche, B W, Kolb, I, Kosarev, I, Koutcheryaev, T, Krümpel, A, Kugler, P, Kulinich, M, Kurata, K, Kurita, N, Kuzmin, I, Langbein, A, Lebedev, Y Y, Lee, H, Löhner, L, Luquin, D P, Mahapatra, V, Manko, M, Martin, G, Martínez, A, Maximov, G, Mgebrichvili, Y, Miake, M F, Mir, G C, Mishra, Y, Miyamoto, B, Mohanty, M J, Mora, D, Morrison, D S, Mukhopadhyay, H, Naef, B K, Nandi, S K, Nayak, T K, Nayak, S, Neumaier, A, Nianine, V, Nikitine, S, Nikolaev, P, Nilsson, S, Nishimura, P, Nomokonov, J, Nystrand, F E, Obenshain, A, Oskarsson, I, Otterlund, M, Pachr, S, Pavliouk, T, Peitzmann, V, Petracek, W, Pinganaud, F, Plasil, U, von Poblotzki, M L, Purschke, J, Rak, R, Raniwala, S, Raniwala, V S, Ramamurthy, N K, Rao, F, Retiere, K, Reygers, G, Roland, L, Rosselet, I, Roufanov, C, Roy, J M, Rubio, H, Sako, S S, Sambyal, R, Santo, S, Sato, H, Schlagheck, H R, Schmidt, Y, Schutz, G, Shabratova, T H, Shah, I, Sibiriak, T, Siemiarczuk, D, Silvermyr, B C, Sinha, N, Slavine, K, Söderström, N, Solomey, S P, Sørensen, P, Stankus, G, Stefanek, P, Steinberg, E, Stenlund, D, Stüken, M, Sumbera, T, Svensson, M D, Trivedi, A, Tsvetkov, L, Tykarski, J, Urbahn, E C, Pijll, N, Eijndhoven, G J, Nieuwenhuizen, A, Vinogradov, Y P, Viyogi, A, Vodopianov, S, Vörös, B, Wysłouch, K, Yagi, Y, Yokota, and G R, Young
Abstract: Three-particle correlations have been measured for identified pi(-) from central 158A GeV Pb+Pb collisions by the WA98 experiment at CERN. A substantial contribution of the genuine three-body correlation has been found as expected for a mainly chaotic and symmetric source.
Published: 2000

30. Observation of Strong Nuclear Suppression in Exclusive J/ψ Photoproduction in Au+Au Ultraperipheral Collisions at RHIC.

Author: Abdulhamid MI, Aboona BE, Adam J, Adamczyk L, Adams JR, Aggarwal I, Aggarwal MM, Ahammed Z, Aschenauer EC, Aslam S, Atchison J, Bairathi V, Cap JGB, Barish K, Bellwied R, Bhagat P, Bhasin A, Bhatta S, Bhosale SR, Bielcik J, Bielcikova J, Brandenburg JD, Broodo C, Cai XZ, Caines H, Sánchez MCB, Cebra D, Ceska J, Chakaberia I, Chaloupka P, Chan BK, Chang Z, Chatterjee A, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Dale-Gau G, Das A, Deppner IM, Dhamija A, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Gagliardi CA, Galatyuk T, Gao T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison-Smith H, He W, He XH, He Y, Herrmann N, Holub L, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isshiki M, Jacobs WW, Jalotra A, Jena C, Jentsch A, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Keane D, Khanal A, Khyzhniak YV, Kikoła DP, Kincses D, Kisel I, Kiselev A, Knospe AG, Ko HS, Kosarzewski LK, Kumar L, Labonte MC, Lacey R, Landgraf JM, Lauret J, Lebedev A, Lee JH, Leung YH, Lewis N, Li C, Li D, Li HS, Li H, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu C, Liu G, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Lomicky O, Longacre RS, Loyd EM, Lu T, Luo J, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Manikandhan R, Margetis S, Markert C, McNamara G, Mezhanska O, Mi K, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Mrazkova J, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nonaka T, Odyniec G, Ogawa A, Oh S, Okubo K, Page BS, Pak R, Pal S, Pandav A, Pandey AK, Pani T, Paul A, Pawlik B, Pawlowska D, Perkins C, Pluta J, Pokhrel BR, Posik M, Protzman T, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qin Z, Qiu H, Racz C, Radhakrishnan SK, Rana A, Ray RL, Reed R, Robertson CW, Robotkova M, Aguilar MAR, Roy D, Chowdhury PR, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Sato S, Schaefer BC, Schmidke WB, Schmitz N, Seck FJ, Seger J, Seto R, Seyboth P, Shah N, Shanmuganathan PV, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen D, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Smirnov N, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stefaniak M, Stewart DJ, Su Y, Sumbera M, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Svoboda M, Sweger ZW, Tamis AC, Tang AH, Tang Z, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Trentalange S, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tsang CY, Tu Z, Tyler J, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vassiliev I, Verkest V, Videbæk F, Voloshin SA, Wang F, Wang G, Wang JS, Wang J, Wang K, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wielanek D, Wieman H, Wilks G, Wissink SW, Witt R, Wu J, Wu J, Wu X, Wu X, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang W, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report a measurement of exclusive J/ψ and ψ(2s) photoproduction in Au+Au ultraperipheral collisions at sqrt[s_{NN}]=200 GeV using the STAR detector. For the first time, (i) the ψ(2s) photoproduction in midrapidity at the Relativistic Heavy-Ion Collider has been experimentally measured; (ii) nuclear suppression factors are measured for both the coherent and incoherent J/ψ production. At average photon-nucleon center-of-mass energy of 25.0 GeV, the coherent and incoherent J/ψ cross sections of Au nuclei are found to be 71±10% and 36±7%, respectively, of that of free protons. The stronger suppression observed in the incoherent production provides a new experimental handle to study the initial-state parton density in heavy nuclei. Data are compared with theoretical models quantitatively.
Published: 2024
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31. Hyperon Polarization along the Beam Direction Relative to the Second and Third Harmonic Event Planes in Isobar Collisions at sqrt[s_{NN}]=200 GeV.

Author: Abdulhamid MI, Aboona BE, Adam J, Adams JR, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Aitbaev A, Alekseev I, Anderson DM, Aparin A, Aslam S, Atchison J, Averichev GS, Bairathi V, Baker W, Cap JGB, Barish K, Bhagat P, Bhasin A, Bhatta S, Bordyuzhin IG, Brandenburg JD, Brandin AV, Cai XZ, Caines H, Sánchez MCB, Cebra D, Ceska J, Chakaberia I, Chan BK, Chang Z, Chatterjee A, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Dale-Gau G, Das A, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Gao T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Hamed A, Han Y, Harasty MD, Harris JW, Harrison-Smith H, He W, He XH, He Y, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Keane D, Kechechyan A, Kelsey M, Kimelman B, Kiselev A, Knospe AG, Ko HS, Kochenda L, Korobitsin AA, Kravtsov P, Kumar L, Kumar S, Elayavalli RK, Lacey R, Landgraf JM, Lebedev A, Lednicky R, Lee JH, Leung YH, Lewis N, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Lin T, Liu C, Liu F, Liu G, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd EM, Lu T, Lukow NS, Luo XF, Luong VB, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Matis HS, Mazer JA, McNamara G, Mi K, Minaev NG, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mudrokh A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Odyniec G, Ogawa A, Oh S, Okorokov VA, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Pani T, Parfenov P, Paul A, Perkins C, Pokhrel BR, Posik M, Protzman T, Pruthi NK, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Ritter HG, Robertson CW, Rogachevsky OV, Aguilar MAR, Roy D, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Samigullin E, Sato S, Schmidke WB, Schmitz N, Seger J, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen D, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stewart DJ, Strikhanov M, Stringfellow B, Su Y, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Svirida DN, Sweger ZW, Tamis A, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Tlusty D, Todoroki T, Tokarev MV, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tsai OD, Tsang CY, Tu Z, Tyler J, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vasiliev AN, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang J, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wieman H, Wilks G, Wissink SW, Wu J, Wu J, Wu X, Wu X, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang W, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: The polarization of Λ and Λ[over ¯] hyperons along the beam direction has been measured relative to the second and third harmonic event planes in isobar Ru+Ru and Zr+Zr collisions at sqrt[s_{NN}]=200 GeV. This is the first experimental evidence of the hyperon polarization by the triangular flow originating from the initial density fluctuations. The amplitudes of the sine modulation for the second and third harmonic results are comparable in magnitude, increase from central to peripheral collisions, and show a mild p_{T} dependence. The azimuthal angle dependence of the polarization follows the vorticity pattern expected due to elliptic and triangular anisotropic flow, and qualitatively disagrees with most hydrodynamic model calculations based on thermal vorticity and shear induced contributions. The model results based on one of existing implementations of the shear contribution lead to a correct azimuthal angle dependence, but predict centrality and p_{T} dependence that still disagree with experimental measurements. Thus, our results provide stringent constraints on the thermal vorticity and shear-induced contributions to hyperon polarization. Comparison to previous measurements at RHIC and the LHC for the second-order harmonic results shows little dependence on the collision system size and collision energy.
Published: 2023
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32. Erratum: Global Polarization of Ξ and Ω Hyperons in Au+Au Collisions at sqrt[s_{NN}]=200 GeV [Phys. Rev. Lett. 126, 162301 (2021)].

Author: 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 FH, 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, 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, Ghimire N, 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, 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, Mooney I, Moravcova Z, Morozov DA, Nagy M, Nam JD, Nasim M, 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, Pokhrel BR, 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, and Zyzak M
Abstract: This corrects the article DOI: 10.1103/PhysRevLett.126.162301.
Published: 2023
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33. Measurement of Direct-Photon Cross Section and Double-Helicity Asymmetry at sqrt[s]=510 GeV in p[over →]+p[over →] Collisions.

Author: Abdulameer NJ, Acharya U, Adare A, Aidala C, Ajitanand NN, Akiba Y, Akimoto R, Alfred M, Apadula N, Aramaki Y, Asano H, Atomssa ET, Awes TC, Azmoun B, Babintsev V, Bai M, Bandara NS, Bannier B, Barish KN, Bathe S, Bazilevsky A, Beaumier M, Beckman S, Belmont R, Berdnikov A, Berdnikov Y, Bichon L, Black D, Blankenship B, Bok JS, Borisov V, Boyle K, Brooks ML, Bryslawskyj J, Buesching H, Bumazhnov V, Campbell S, Canoa Roman V, Chen CH, Chiu M, Chi CY, Choi IJ, Choi JB, Chujo T, Citron Z, Connors M, Corliss R, Corrales Morales Y, Csanád M, Csörgő T, Datta A, Daugherity MS, David G, Dean CT, DeBlasio K, Dehmelt K, Denisov A, Deshpande A, Desmond EJ, Ding L, Dion A, Doomra V, Do JH, Drees A, Drees KA, Durham JM, Durum A, En'yo H, Enokizono A, Esha R, Fadem B, Fan W, Feege N, Fields DE, Finger M, Finger M, Firak D, Fitzgerald D, Fokin SL, Frantz JE, Franz A, Frawley AD, Gallus P, Gal C, Garg P, Ge H, Giles M, Giordano F, Glenn A, Goto Y, Grau N, Greene SV, Grosse Perdekamp M, Gunji T, Guragain H, Gu Y, Hachiya T, Haggerty JS, Hahn KI, Hamagaki H, Hanks J, Han SY, Harvey M, Hasegawa S, Hemmick TK, He X, Hill JC, Hodges A, Hollis RS, Homma K, Hong B, Hoshino T, Huang J, Ikeda Y, Imai K, Imazu Y, Inaba M, Iordanova A, Isenhower D, Ivanishchev D, Jacak BV, Jeon SJ, Jezghani M, Jiang X, Ji Z, Johnson BM, Joo E, Joo KS, Jouan D, Jumper DS, Kang JH, Kang JS, Kawall D, Kazantsev AV, Key JA, Khachatryan V, Khanzadeev A, Khatiwada A, Kihara K, Kim C, Kim DH, Kim DJ, Kim EJ, Kim HJ, Kim M, Kim T, Kim YK, Kincses D, Kingan A, Kistenev E, Klatsky J, Kleinjan D, Kline P, Koblesky T, Kofarago M, Koster J, Kotov D, Kovacs L, Kurgyis B, Kurita K, Kurosawa M, Kwon Y, Lajoie JG, Larionova D, Lebedev A, Lee KB, Lee SH, Leitch MJ, Leitgab M, Lewis NA, Lim SH, Liu MX, Li X, Loomis DA, Lynch D, Lökös S, Majoros T, Makdisi YI, Makek M, Manion A, Manko VI, Mannel E, McCumber M, McGaughey PL, McGlinchey D, McKinney C, Meles A, Mendoza M, Meredith B, Miake Y, Mignerey AC, Miller AJ, Milov A, Mishra DK, Mitchell JT, Mitrankova M, Mitrankov I, Miyasaka S, Mizuno S, Mondal MM, Montuenga P, Moon T, Morrison DP, Moukhanova TV, Muhammad A, Mulilo B, Murakami T, Murata J, Mwai A, Nagamiya S, Nagle JL, Nagy MI, Nakagawa I, Nakagomi H, Nakano K, Nattrass C, Nelson S, Netrakanti PK, Nihashi M, Niida T, Nouicer R, Novitzky N, Nukazuka G, Nyanin AS, O'Brien E, Ogilvie CA, Oh J, Orjuela Koop JD, Orosz M, Osborn JD, Oskarsson A, Ozawa K, Pak R, Pantuev V, Papavassiliou V, Park JS, Park S, Patel L, Patel M, Pate SF, Peng JC, Peng W, Perepelitsa DV, Perera GDN, Peressounko DY, PerezLara CE, Perry J, Petti R, Pinkenburg C, Pinson R, Pisani RP, Potekhin M, Pun A, Purschke ML, Radzevich PV, Rak J, Ramasubramanian N, Ravinovich I, Read KF, Reynolds D, Riabov V, Riabov Y, Richford D, Riveli N, Roach D, Rolnick SD, Rosati M, Rowan Z, Rubin JG, Runchey J, Saito N, Sakaguchi T, Sako H, Samsonov V, Sarsour M, Sato S, Sawada S, Schaefer B, Schmoll BK, Sedgwick K, Seele J, Seidl R, Sen A, Seto R, Sett P, Sexton A, Sharma D, Shein I, Shibata M, Shibata TA, Shigaki K, Shimomura M, Shi Z, Shukla P, Sickles A, Silva CL, Silvermyr D, Singh BK, Singh CP, Singh V, Slunečka M, Smith KL, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Stankus PW, Stepanov M, Stoll SP, Sugitate T, Sukhanov A, Sumita T, Sun J, Sun Z, Sziklai J, Takahama R, Takahara A, Taketani A, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Timilsina A, Todoroki T, Tomášek M, Torii H, Towell M, Towell R, Towell RS, Tserruya I, Ueda Y, Ujvari B, van Hecke HW, Vargyas M, Velkovska J, Virius M, Vrba V, Vznuzdaev E, Wang XR, Wang Z, Watanabe D, Watanabe Y, Watanabe YS, Wei F, Whitaker S, Wolin S, Wong CP, Woody CL, Wysocki M, Xia B, Xue L, Yalcin S, Yamaguchi YL, Yanovich A, Yoon I, Younus I, Yushmanov IE, Zajc WA, Zelenski A, and Zou L
Subjects: Motion, Photons, Food
Abstract: We present measurements of the cross section and double-helicity asymmetry A_{LL} of direct-photon production in p[over →]+p[over →] collisions at sqrt[s]=510 GeV. The measurements have been performed at midrapidity (|η|<0.25) with the PHENIX detector at the Relativistic Heavy Ion Collider. At relativistic energies, direct photons are dominantly produced from the initial quark-gluon hard scattering and do not interact via the strong force at leading order. Therefore, at sqrt[s]=510 GeV, where leading-order-effects dominate, these measurements provide clean and direct access to the gluon helicity in the polarized proton in the gluon-momentum-fraction range 0.02
Published: 2023
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34. Measurements of the Elliptic and Triangular Azimuthal Anisotropies in Central ^{3}He+Au, d+Au and p+Au Collisions at sqrt[s_{NN}]=200 GeV.

Author: Abdulhamid MI, Aboona BE, Adam J, Adams JR, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Aitbaev A, Alekseev I, Anderson DM, Aparin A, Aslam S, Atchison J, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Bhagat P, Bhasin A, Bhatta S, Bordyuzhin IG, Brandenburg JD, Brandin AV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Ceska J, Chakaberia I, Chan BK, Chang Z, Chatterjee A, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Dale-Gau G, Das A, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Hamed A, Han Y, Harasty MD, Harris JW, Harrison-Smith H, He W, He XH, He Y, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Kelsey M, Kimelman B, Kiselev A, Knospe AG, Ko HS, Kochenda L, Korobitsin AA, Kravtsov P, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Lacey R, Landgraf JM, Lebedev A, Lednicky R, Lee JH, Leung YH, Lewis N, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Lin T, Liu C, Liu F, Liu G, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd EM, Lu T, Lukow NS, Luo XF, Luong VB, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Matis HS, Mazer JA, McNamara G, Mi K, Minaev NG, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mudrokh A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Odyniec G, Ogawa A, Oh S, Okorokov VA, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Pani T, Parfenov P, Paul A, Perkins C, Pokhrel BR, Posik M, Protzman T, Pruthi NK, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Ritter HG, Robertson CW, Rogachevsky OV, Rosales Aguilar MA, Roy D, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Samigullin E, Sato S, Schmidke WB, Schmitz N, Seger J, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stewart DJ, Strikhanov M, Stringfellow B, Su Y, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Svirida DN, Sweger ZW, Tamis A, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Tlusty D, Todoroki T, Tokarev MV, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tsai OD, Tsang CY, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vasiliev AN, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wieman H, Wilks G, Wissink SW, Wu J, Wu J, Wu X, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang W, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: The elliptic (v_{2}) and triangular (v_{3}) azimuthal anisotropy coefficients in central ^{3}He+Au, d+Au, and p+Au collisions at sqrt[s_{NN}]=200 GeV are measured as a function of transverse momentum (p_{T}) at midrapidity (|η|<0.9), via the azimuthal angular correlation between two particles both at |η|<0.9. While the v_{2}(p_{T}) values depend on the colliding systems, the v_{3}(p_{T}) values are system independent within the uncertainties, suggesting an influence on eccentricity from subnucleonic fluctuations in these small-sized systems. These results also provide stringent constraints for the hydrodynamic modeling of these systems.
Published: 2023
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35. Observation of Directed Flow of Hypernuclei _{Λ}^{3}H and _{Λ}^{4}H in sqrt[s_{NN}]=3 GeV Au+Au Collisions at RHIC.

Author: Aboona BE, Adam J, Adams JR, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Aitbaev A, Alekseev I, Anderson DM, Aparin A, Atchison J, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Bhagat P, Bhasin A, Bhatta S, Bordyuzhin IG, Brandenburg JD, Brandin AV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Ceska J, Chakaberia I, Chan BK, Chang Z, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Dale-Gau G, Das A, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Hamed A, Han Y, Harasty MD, Harris JW, Harrison H, He W, He XH, He Y, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Kelsey M, Kimelman B, Kiselev A, Knospe AG, Ko HS, Kochenda L, Korobitsin AA, Kravtsov P, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Lacey R, Landgraf JM, Lebedev A, Lednicky R, Lee JH, Leung YH, Lewis N, Li C, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Lin T, Liu C, Liu F, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd E, Lu T, Lukow NS, Luo XF, Luong VB, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Matis HS, Mazer JA, McNamara G, Mi K, Minaev NG, Mohanty B, Mooney I, Morozov DA, Mudrokh A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Pani T, Parfenov P, Paul A, Perkins C, Pokhrel BR, Posik M, Protzman T, Pruthi NK, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Ritter HG, Robertson CW, Rogachevsky OV, Rosales Aguilar MA, Roy D, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Samigullin E, Sato S, Schmidke WB, Schmitz N, Seger J, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao M, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stewart DJ, Strikhanov M, Stringfellow B, Su Y, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Svirida DN, Sweger ZW, Tamis A, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Tlusty D, Todoroki T, Tokarev MV, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tsai OD, Tsang CY, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vasiliev AN, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wieman H, Wilks G, Wissink SW, Wu J, Wu J, Wu X, Wu Y, Xi B, Xiao ZG, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report here the first observation of directed flow (v_{1}) of the hypernuclei _{Λ}^{3}H and _{Λ}^{4}H in mid-central Au+Au collisions at sqrt[s_{NN}]=3 GeV at RHIC. These data are taken as part of the beam energy scan program carried out by the STAR experiment. From 165×10^{6} events in 5%-40% centrality, about 8400 _{Λ}^{3}H and 5200 _{Λ}^{4}H candidates are reconstructed through two- and three-body decay channels. We observe that these hypernuclei exhibit significant directed flow. Comparing to that of light nuclei, it is found that the midrapidity v_{1} slopes of _{Λ}^{3}H and _{Λ}^{4}H follow baryon number scaling, implying that the coalescence is the dominant mechanism for these hypernuclei production in the 3 GeV Au+Au collisions.
Published: 2023
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36. Beam Energy Dependence of Triton Production and Yield Ratio (N_{t}×N_{p}/N_{d}^{2}) in Au+Au Collisions at RHIC.

Author: Abdulhamid MI, Aboona BE, Adam J, Adams JR, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Aitbaev A, Alekseev I, Anderson DM, Aparin A, Aslam S, Atchison J, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Bhagat P, Bhasin A, Bhatta S, Bordyuzhin IG, Brandenburg JD, Brandin AV, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Ceska J, Chakaberia I, Chan BK, Chang Z, Chatterjee A, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Dale-Gau G, Das A, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Hamed A, Han Y, Harasty MD, Harris JW, Harrison-Smith H, He W, He XH, He Y, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Kelsey M, Kimelman B, Kiselev A, Knospe AG, Ko HS, Kochenda L, Korobitsin AA, Kravtsov P, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Lacey R, Landgraf JM, Lebedev A, Lednicky R, Lee JH, Leung YH, Lewis N, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Lin T, Liu C, Liu F, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd EM, Lu T, Lukow NS, Luo XF, Luong VB, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Matis HS, Mazer JA, McNamara G, Mi K, Minaev NG, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mudrokh A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Odyniec G, Ogawa A, Oh S, Okorokov VA, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Pani T, Parfenov P, Paul A, Perkins C, Pokhrel BR, Posik M, Protzman T, Pruthi NK, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Ritter HG, Robertson CW, Rogachevsky OV, Rosales Aguilar MA, Roy D, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Samigullin E, Sato S, Schmidke WB, Schmitz N, Seger J, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stewart DJ, Strikhanov M, Stringfellow B, Su Y, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Svirida DN, Sweger ZW, Tamis A, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Tlusty D, Todoroki T, Tokarev MV, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tsai OD, Tsang CY, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vasiliev AN, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wieman H, Wilks G, Wissink SW, Wu J, Wu J, Wu X, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu N, Yu Y, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report the triton (t) production in midrapidity (|y|<0.5) Au+Au collisions at sqrt[s_{NN}]=7.7-200 GeV measured by the STAR experiment from the first phase of the beam energy scan at the Relativistic Heavy Ion Collider. The nuclear compound yield ratio (N_{t}×N_{p}/N_{d}^{2}), which is predicted to be sensitive to the fluctuation of local neutron density, is observed to decrease monotonically with increasing charged-particle multiplicity (dN_{ch}/dη) and follows a scaling behavior. The dN_{ch}/dη dependence of the yield ratio is compared to calculations from coalescence and thermal models. Enhancements in the yield ratios relative to the coalescence baseline are observed in the 0%-10% most central collisions at 19.6 and 27 GeV, with a significance of 2.3σ and 3.4σ, respectively, giving a combined significance of 4.1σ. The enhancements are not observed in peripheral collisions or model calculations without critical fluctuation, and decreases with a smaller p_{T} acceptance. The physics implications of these results on the QCD phase structure and the production mechanism of light nuclei in heavy-ion collisions are discussed.
Published: 2023
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37. Measurement of Sequential ϒ Suppression in Au+Au Collisions at sqrt[s_{NN}]=200 GeV with the STAR Experiment.

Author: Aboona BE, Adam J, Adamczyk L, Adams JR, Aggarwal I, Aggarwal MM, Ahammed Z, Anderson DM, Aschenauer EC, Atchison J, Bairathi V, Baker W, Ball Cap JG, Barish K, Bellwied R, Bhagat P, Bhasin A, Bhatta S, Bielcik J, Bielcikova J, Brandenburg JD, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Ceska J, Chakaberia I, Chaloupka P, Chan BK, Chang Z, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Dale-Gau G, Das A, Daugherity M, Deppner IM, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He W, He XH, He Y, Heppelmann S, Herrmann N, Holub L, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Jentsch A, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kagamaster S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kelsey M, Khyzhniak YV, Kikoła DP, Kimelman B, Kincses D, Kisel I, Kiselev A, Knospe AG, Ko HS, Kosarzewski LK, Kramarik L, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Lacey R, Landgraf JM, Lauret J, Lebedev A, Lee JH, Leung YH, Lewis N, Li C, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Licenik R, Lin T, Lisa MA, Liu C, Liu F, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd E, Lu T, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, McNamara G, Mi K, Mioduszewski S, Mohanty B, Mooney I, Mukherjee A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Niida T, Nishitani R, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Pani T, Paul A, Pawlik B, Pawlowska D, Perkins C, Pluta J, Pokhrel BR, Posik M, Protzman T, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robertson CW, Robotkova M, Romero JL, Rosales Aguilar MA, Roy D, Roy Chowdhury P, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Sato S, Schmidke WB, Schmitz N, Seck FJ, Seger J, Seto R, Seyboth P, Shah N, Shanmuganathan PV, Shao M, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Smirnov N, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stefaniak M, Stewart DJ, Stringfellow B, Su Y, Suaide AAP, Sumbera M, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Sweger ZW, Szymanski P, Tamis A, Tang AH, Tang Z, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Truhlar T, Trzeciak BA, Tsai OD, Tsang CY, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vassiliev I, Verkest V, Videbæk F, Voloshin SA, Wang F, Wang G, Wang JS, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wielanek D, Wieman H, Wilks G, Wissink SW, Witt R, Wu J, Wu J, Wu X, Wu Y, Xi B, Xiao ZG, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report on measurements of sequential ϒ suppression in Au+Au collisions at sqrt[s_{NN}]=200 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC) through both the dielectron and dimuon decay channels. In the 0%-60% centrality class, the nuclear modification factors (R_{AA}), which quantify the level of yield suppression in heavy-ion collisions compared to p+p collisions, for ϒ(1S) and ϒ(2S) are 0.40±0.03(stat)±0.03(sys)±0.09(norm) and 0.26±0.08(stat)±0.02(sys)±0.06(norm), respectively, while the upper limit of the ϒ(3S) R_{AA} is 0.17 at a 95% confidence level. This provides experimental evidence that the ϒ(3S) is significantly more suppressed than the ϒ(1S) at RHIC. The level of suppression for ϒ(1S) is comparable to that observed at the much higher collision energy at the Large Hadron Collider. These results point to the creation of a medium at RHIC whose temperature is sufficiently high to strongly suppress excited ϒ states.
Published: 2023
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38. Beam Energy Dependence of Fifth- and Sixth-Order Net-Proton Number Fluctuations in Au+Au Collisions at RHIC.

Author: Aboona BE, Adam J, Adamczyk L, Adams JR, Aggarwal I, Aggarwal MM, Ahammed Z, Anderson DM, Aschenauer EC, Atchison J, Bairathi V, Baker W, Ball Cap JG, Barish K, Bellwied R, Bhagat P, Bhasin A, Bhatta S, Bielcik J, Bielcikova J, Brandenburg JD, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Ceska J, Chakaberia I, Chaloupka P, Chan BK, Chang Z, Chen D, Chen J, Chen JH, Chen Z, Cheng J, Cheng Y, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Dale-Gau G, Das A, Daugherity M, Deppner IM, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fazio S, Feng CJ, Feng Y, Finch E, Fisyak Y, Flor FA, Fu C, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He W, He XH, He Y, Heppelmann S, Herrmann N, Holub L, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jalotra A, Jena C, Jentsch A, Ji Y, Jia J, Jin C, Ju X, Judd EG, Kabana S, Kabir ML, Kagamaster S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kelsey M, Khyzhniak YV, Kikoła DP, Kimelman B, Kincses D, Kisel I, Kiselev A, Knospe AG, Ko HS, Kosarzewski LK, Kramarik L, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Lacey R, Landgraf JM, Lauret J, Lebedev A, Lee JH, Leung YH, Lewis N, Li C, Li C, Li W, Li X, Li Y, Li Y, Li Z, Liang X, Liang Y, Licenik R, Lin T, Lisa MA, Liu C, Liu F, Liu H, Liu H, Liu L, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Lomicky O, Longacre RS, Loyd E, Lu T, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, McNamara G, Mi K, Mioduszewski S, Mohanty B, Mooney I, Mukherjee A, Nagy MI, Nain AS, Nam JD, Nasim M, Neff D, Nelson JM, Nemes DB, Nie M, Niida T, Nishitani R, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Pani T, Paul A, Pawlik B, Pawlowska D, Perkins C, Pluta J, Pokhrel BR, Posik M, Protzman T, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qin Z, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robertson CW, Robotkova M, Romero JL, Rosales Aguilar MA, Roy D, Roy Chowdhury P, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Sato S, Schmidke WB, Schmitz N, Seck FJ, Seger J, Seto R, Seyboth P, Shah N, Shanmuganathan PV, Shao M, Shao T, Sharma M, Sharma N, Sharma R, Sharma SR, Sheikh AI, Shen DY, Shen K, Shi SS, Shi Y, Shou QY, Si F, Singh J, Singha S, Sinha P, Skoby MJ, Smirnov N, Söhngen Y, Song Y, Srivastava B, Stanislaus TDS, Stefaniak M, Stewart DJ, Stringfellow B, Su Y, Suaide AAP, Sumbera M, Sun C, Sun X, Sun Y, Sun Y, Surrow B, Sweger ZW, Szymanski P, Tamis A, Tang AH, Tang Z, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Truhlar T, Trzeciak BA, Tsai OD, Tsang CY, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vassiliev I, Verkest V, Videbæk F, Voloshin SA, Wang F, Wang G, Wang JS, Wang X, Wang Y, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wielanek D, Wieman H, Wilks G, Wissink SW, Witt R, Wu J, Wu J, Wu X, Wu Y, Xi B, Xiao ZG, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Y, Xu Z, Xu Z, Yan G, Yan Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang X, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou J, Zhou S, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report the beam energy and collision centrality dependence of fifth and sixth order cumulants (C_{5}, C_{6}) and factorial cumulants (κ_{5}, κ_{6}) of net-proton and proton number distributions, from center-of-mass energy (sqrt[s_{NN}]) 3 GeV to 200 GeV Au+Au collisions at RHIC. Cumulant ratios of net-proton (taken as proxy for net-baryon) distributions generally follow the hierarchy expected from QCD thermodynamics, except for the case of collisions at 3 GeV. The measured values of C_{6}/C_{2} for 0%-40% centrality collisions show progressively negative trend with decreasing energy, while it is positive for the lowest energy studied. These observed negative signs are consistent with QCD calculations (for baryon chemical potential, μ_{B}≤110 MeV) which contains the crossover transition range. In addition, for energies above 7.7 GeV, the measured proton κ_{n}, within uncertainties, does not support the two-component (Poisson+binomial) shape of proton number distributions that would be expected from a first-order phase transition. Taken in combination, the hyperorder proton number fluctuations suggest that the structure of QCD matter at high baryon density, μ_{B}∼750 MeV at sqrt[s_{NN}]=3 GeV is starkly different from those at vanishing μ_{B}∼24 MeV at sqrt[s_{NN}]=200 GeV and higher collision energies.
Published: 2023
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39. Collision-System and Beam-Energy Dependence of Anisotropic Flow Fluctuations.

Author: Abdallah MS, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Butterworth J, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, 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, Kisel I, Kiselev A, Knospe AG, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, 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 X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Pei H, Perkins C, Pinsky L, Pintér RL, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, Rogachevskiy OV, Romero JL, Roy D, 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, Shao T, Sheikh AI, Shen D, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang G, Wang JS, Wang P, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Wen L, Westfall GD, Wieman H, Wissink SW, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhu X, Zhu Z, Zurek M, and Zyzak M
Abstract: Elliptic flow measurements from two-, four-, and six-particle correlations are used to investigate flow fluctuations in collisions of U+U at sqrt[s_{NN}]=193 GeV, Cu+Au at sqrt[s_{NN}]=200 GeV and Au+Au spanning the range sqrt[s_{NN}]=11.5-200 GeV. The measurements show a strong dependence of the flow fluctuations on collision centrality, a modest dependence on system size, and very little if any, dependence on particle species and beam energy. The results, when compared to similar LHC measurements, viscous hydrodynamic calculations, and trento model eccentricities, indicate that initial-state-driven fluctuations predominate the flow fluctuations generated in the collisions studied.
Published: 2022
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40. Evidence for Nonlinear Gluon Effects in QCD and Their Mass Number Dependence at STAR.

Author: Abdallah MS, Aboona BE, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, 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, Kisel I, Kiselev A, Knospe AG, Ko HS, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, 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, Lewis N, Li C, Li C, Li W, Li X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy Abdelwahab Abdelrahman N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Perkins C, Pinsky L, Pintér RL, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, Rogachevskiy OV, Romero JL, Roy D, Ruan L, Rusnak J, Sahoo AK, 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, Shao T, Sheikh AI, Shen DY, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang P, Wang X, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Wen L, Westfall GD, Wieman H, Wissink SW, Wu J, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yan G, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: The STAR Collaboration reports measurements of back-to-back azimuthal correlations of di-π^{0}s produced at forward pseudorapidities (2.6<η<4.0) 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
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41. Measurements of Proton High-Order Cumulants in sqrt[s_{NN}]=3 GeV Au+Au Collisions and Implications for the QCD Critical Point.

Author: Abdallah MS, Aboona BE, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, 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, Kisel I, Kiselev A, Knospe AG, Ko HS, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, 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, Lewis N, Li C, Li C, Li W, Li X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Perkins C, Pinsky L, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, Rogachevskiy OV, Romero JL, Roy D, Ruan L, Rusnak J, Sahoo AK, 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, Shao T, Sheikh AI, Shen DY, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, Solyst W, Song Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang P, Wang X, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Wen L, Westfall GD, Wieman H, Wissink SW, Witt R, Wu J, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yan G, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report cumulants of the proton multiplicity distribution from dedicated fixed-target Au+Au collisions at sqrt[s_{NN}]=3.0 GeV, measured by the STAR experiment in the kinematic acceptance of rapidity (y) and transverse momentum (p_{T}) within -0.5
Published: 2022
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42. Measurements of _{Λ}^{3}H and _{Λ}^{4}H Lifetimes and Yields in Au+Au Collisions in the High Baryon Density Region.

Author: Abdallah MS, Aboona BE, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, 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, Kisel I, Kiselev A, Knospe AG, Ko HS, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, 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, Lewis N, Li C, Li C, Li W, Li X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy N, Mallick D, Margetis S, Markert C, Matis HS, Mazer JA, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Perkins C, Pinsky L, Pintér RL, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, Rogachevskiy OV, Romero JL, Roy D, Ruan L, Rusnak J, Sahoo AK, 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, Shao T, Sheikh AI, Shen DY, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, Videbaek F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang P, Wang X, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Wen L, Westfall GD, Wieman H, Wissink SW, Witt R, Wu J, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yan G, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: We report precision measurements of hypernuclei _{Λ}^{3}H and _{Λ}^{4}H lifetimes obtained from Au+Au collisions at sqrt[s_{NN}]=3.0 GeV and 7.2 GeV collected by the STAR experiment at the Relativistic Heavy Ion Collider, and the first measurement of _{Λ}^{3}H and _{Λ}^{4}H midrapidity yields in Au+Au collisions at sqrt[s_{NN}]=3.0 GeV. _{Λ}^{3}H and _{Λ}^{4}H, being the two simplest bound states composed of hyperons and nucleons, are cornerstones in the field of hypernuclear physics. Their lifetimes are measured to be 221±15(stat)±19(syst) ps for _{Λ}^{3}H and 218±6(stat)±13(syst) ps for _{Λ}^{4}H. The p_{T}-integrated yields of _{Λ}^{3}H and _{Λ}^{4}H are presented in different centrality and rapidity intervals. It is observed that the shape of the rapidity distribution of _{Λ}^{4}H is different for 0%-10% and 10%-50% centrality collisions. Thermal model calculations, using the canonical ensemble for strangeness, describes the _{Λ}^{3}H yield well, while underestimating the _{Λ}^{4}H yield. Transport models, combining baryonic mean-field and coalescence (jam) or utilizing dynamical cluster formation via baryonic interactions (phqmd) for light nuclei and hypernuclei production, approximately describe the measured _{Λ}^{3}H and _{Λ}^{4}H yields. Our measurements provide means to precisely assess our understanding of the fundamental baryonic interactions with strange quarks, which can impact our understanding of more complicated systems involving hyperons, such as the interior of neutron stars or exotic hypernuclei.
Published: 2022
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43. Probing the Gluonic Structure of the Deuteron with J/ψ Photoproduction in d+Au Ultraperipheral Collisions.

Author: Abdallah MS, Aboona BE, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Aitbaev A, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dixit P, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Finch E, Fisyak Y, Francisco A, Fu C, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu C, Hu Q, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Isenhower D, Isshiki M, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, 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, Kikoła DP, Kimelman B, Kincses D, Kisel I, Kiselev A, Knospe AG, Ko HS, Kochenda L, Korobitsin A, Kosarzewski LK, Kramarik L, Kravtsov P, 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, Lewis N, Li C, Li C, Li W, Li X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lu T, Lukow NS, Luo XF, Ma L, Ma R, Ma YG, Magdy Abdelwahab Abdelrahman N, Mallick D, Manukhov SL, Margetis S, Markert C, Matis HS, Mazer JA, Minaev NG, Mioduszewski S, Mohanty B, Mondal MM, Mooney I, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Okubo K, Page BS, Pak R, Pan J, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Paul A, Pawlik B, Pawlowska D, Perkins C, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, Romero JL, Roy D, Ruan L, Sahoo AK, Sahoo NR, Sako H, Salur S, Samigullin E, Sandweiss J, Sato S, Schmidke WB, Schmitz N, Schweid BR, Seck F, Seger J, Seto R, Seyboth P, Shah N, Shahaliev E, Shanmuganathan PV, Shao M, Shao T, Sharma R, Sheikh AI, Shen DY, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Sinha P, Skoby MJ, Smirnov N, Söhngen Y, Solyst W, Song Y, Spinka HM, Srivastava B, Stanislaus TDS, Stefaniak M, Stewart DJ, Strikhanov M, Stringfellow B, Suaide AAP, Sumbera M, Sun XM, Sun X, Sun Y, Sun Y, Surrow B, Svirida DN, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, Videbæk F, Vokal S, Voloshin SA, Wang F, Wang G, Wang JS, Wang P, Wang X, Wang Y, Wang Y, Wang Z, Webb JC, Weidenkaff PC, Westfall GD, Wieman H, Wissink SW, Witt R, Wu J, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yan G, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao F, Zhao J, Zhao M, Zhou C, Zhou Y, Zhu X, Zurek M, and Zyzak M
Abstract: Understanding gluon density distributions and how they are modified in nuclei are among the most important goals in nuclear physics. In recent years, diffractive vector meson production measured in ultraperipheral collisions (UPCs) at heavy-ion colliders has provided a new tool for probing the gluon density. In this Letter, we report the first measurement of J/ψ photoproduction off the deuteron in UPCs at the center-of-mass energy sqrt[s_{NN}]=200 GeV in d+Au collisions. The differential cross section as a function of momentum transfer -t is measured. In addition, data with a neutron tagged in the deuteron-going zero-degree calorimeter is investigated for the first time, which is found to be consistent with the expectation of incoherent diffractive scattering at low momentum transfer. Theoretical predictions based on the color glass condensate saturation model and the leading twist approximation nuclear shadowing model are compared with the data quantitatively. A better agreement with the saturation model has been observed. With the current measurement, the results are found to be directly sensitive to the gluon density distribution of the deuteron and the deuteron breakup process, which provides insights into the nuclear gluonic structure.
Published: 2022
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44. Search for the Chiral Magnetic Effect via Charge-Dependent Azimuthal Correlations Relative to Spectator and Participant Planes in Au+Au Collisions at sqrt[s_{NN}]=200 GeV.

Author: Abdallah MS, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Butterworth J, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dong X, Drachenberg JL, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, Ju X, Judd EG, Kabana S, Kabir ML, Kagamaster S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Khyzhniak YV, Kikoła DP, Kim C, Kimelman B, Kincses D, Kisel I, Kiselev A, Knospe AG, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, Kumar L, Kumar S, Kunnawalkam Elayavalli R, Kwasizur JH, Lan S, Landgraf JM, Lauret J, Lebedev A, Lednicky R, Lee JH, Leung YH, Li C, Li C, Li W, Li X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo X, 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, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Pei H, Perkins C, Pinsky L, Pintér RL, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, 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, Shao T, Sheikh AI, Shen D, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, 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, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yang C, Yang Q, Yang S, Yang Y, 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 Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhu X, Zhu Z, Zurek M, and Zyzak M
Abstract: The chiral magnetic effect (CME) refers to charge separation along a strong magnetic field due to imbalanced chirality of quarks in local parity and charge-parity violating domains in quantum chromodynamics. The experimental measurement of the charge separation is made difficult by the presence of a major background from elliptic azimuthal anisotropy. This background and the CME signal have different sensitivities to the spectator and participant planes, and could thus be determined by measurements with respect to these planes. We report such measurements in Au+Au collisions at a nucleon-nucleon center-of-mass energy of 200 GeV at the Relativistic Heavy-Ion Collider. It is found that the charge separation, with the flow background removed, is consistent with zero in peripheral (large impact parameter) collisions. Some indication of finite CME signals is seen in midcentral (intermediate impact parameter) collisions. Significant residual background effects may, however, still be present.
Published: 2022
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45. Precise Measurement of Differential Cross Sections of the Σ^{-}p→Λn Reaction in Momentum Range 470-650 MeV/c.

Author: Miwa K, Ahn JK, Akazawa Y, Aramaki T, Ashikaga S, Callier S, Chiga N, Choi SW, Ekawa H, Evtoukhovitch P, Fujioka N, Fujita M, Gogami T, Harada T, Hasegawa S, Hayakawa SH, Honda R, Hoshino S, Hosomi K, Ichikawa M, Ichikawa Y, Ieiri M, Ikeda M, Imai K, Ishikawa Y, Ishimoto S, Jung WS, Kajikawa S, Kanauchi H, Kanda H, Kitaoka T, Kang BM, Kawai H, Kim SH, Kobayashi K, Koike T, Matsuda K, Matsumoto Y, Nagao S, Nagatomi R, Nakada Y, Nakagawa M, Nakamura I, Nanamura T, Naruki M, Ozawa S, Raux L, Rogers TG, Sakaguchi A, Sakao T, Sako H, Sato S, Shiozaki T, Shirotori K, Suzuki KN, Suzuki S, Tabata M, Taille CDL, Takahashi H, Takahashi T, Takahashi TN, Tamura H, Tanaka M, Tanida K, Tsamalaidze Z, Ukai M, Umetsu H, Wada S, Yamamoto TO, Yoshida J, and Yoshimura K
Abstract: The differential cross sections of the Σ^{-}p→Λn reaction were measured accurately for the Σ^{-} momentum (p_{Σ}) ranging from 470 to 650 MeV/c at the J-PARC Hadron Experimental Facility. Precise angular information about the Σ^{-}p→Λn reaction was obtained for the first time by detecting approximately 100 reaction events at each angular step of Δcosθ=0.1. The obtained differential cross sections show a slightly forward-peaking structure in the measured momentum regions. The cross sections integrated for -0.7≤cosθ≤1.0 were obtained as 22.5±0.68 [statistical error(stat.)] ±0.65 [systematic error(syst.)] mb and 15.8±0.83(stat)±0.52(syst) mb for 470
Published: 2022
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46. Measurement of the Sixth-Order Cumulant of Net-Proton Multiplicity Distributions in Au+Au Collisions at sqrt[s_{NN}]=27, 54.4, and 200 GeV at RHIC.

Author: Abdallah MS, Adam J, Adamczyk L, Adams JR, Adkins JK, Agakishiev G, Aggarwal I, Aggarwal MM, Ahammed Z, Alekseev I, Anderson DM, Aparin A, Aschenauer EC, Ashraf MU, Atetalla FG, Attri A, Averichev GS, Bairathi V, Baker W, Ball Cap JG, Barish K, Behera A, Bellwied R, Bhagat P, Bhasin A, Bielcik J, Bielcikova J, Bordyuzhin IG, Brandenburg JD, Brandin AV, Bunzarov I, Butterworth J, Cai XZ, Caines H, Calderón de la Barca Sánchez M, Cebra D, Chakaberia I, Chaloupka P, Chan BK, Chang FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chattopadhyay S, Chen D, Chen J, Chen JH, Chen X, Chen Z, Cheng J, Chevalier M, Choudhury S, Christie W, Chu X, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Dhamija A, Di Carlo L, Didenko L, Dong X, Drachenberg JL, Duckworth E, Dunlop JC, Elsey N, Engelage J, Eppley G, Esumi S, Evdokimov O, Ewigleben A, Eyser O, Fatemi R, Fawzi FM, Fazio S, Federic P, Fedorisin J, Feng CJ, Feng Y, Filip P, Finch E, Fisyak Y, Francisco A, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Gupta A, Guryn W, Hamad AI, Hamed A, Han Y, Harabasz S, Harasty MD, Harris JW, Harrison H, He S, He W, He XH, He Y, Heppelmann S, Heppelmann S, Herrmann N, Hoffman E, Holub L, Hu Y, Huang H, Huang HZ, Huang SL, Huang T, Huang X, Huang Y, Humanic TJ, Igo G, Isenhower D, Jacobs WW, Jena C, Jentsch A, Ji Y, Jia J, Jiang K, Ju X, Judd EG, Kabana S, Kabir ML, Kagamaster S, Kalinkin D, Kang K, Kapukchyan D, Kauder K, Ke HW, Keane D, Kechechyan A, Khyzhniak YV, Kikoła DP, Kim C, Kimelman B, Kincses D, Kisel I, Kiselev A, Knospe AG, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, 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 X, Li Y, Liang X, Liang Y, Licenik R, Lin T, Lin Y, Lisa MA, Liu F, Liu H, Liu H, Liu P, Liu T, Liu X, Liu Y, Liu Z, Ljubicic T, Llope WJ, Longacre RS, Loyd E, Lukow NS, Luo X, 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, Morozov DA, Mukherjee A, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nishitani R, Nogach LV, Nonaka T, Nunes AS, Odyniec G, Ogawa A, Oh S, Okorokov VA, Page BS, Pak R, Pandav A, Pandey AK, Panebratsev Y, Parfenov P, Pawlik B, Pawlowska D, Pei H, Perkins C, Pinsky L, Pintér RL, Pluta J, Pokhrel BR, Ponimatkin G, Porter J, Posik M, Prozorova V, Pruthi NK, Przybycien M, Putschke J, Qiu H, Quintero A, Racz C, Radhakrishnan SK, Raha N, Ray RL, Reed R, Ritter HG, Robotkova M, 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, Shao T, Sheikh AI, Shen D, Shi SS, Shi Y, Shou QY, Sichtermann EP, Sikora R, Simko M, Singh J, Singha S, Skoby MJ, Smirnov N, Söhngen Y, 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, Sweger ZW, Szymanski P, Tang AH, Tang Z, Taranenko A, Tarnowsky T, Thomas JH, Timmins AR, Tlusty D, Todoroki T, Tokarev M, Tomkiel CA, Trentalange S, Tribble RE, Tribedy P, Tripathy SK, Truhlar T, Trzeciak BA, Tsai OD, Tu Z, Ullrich T, Underwood DG, Upsal I, Van Buren G, Vanek J, Vasiliev AN, Vassiliev I, Verkest V, 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, Wu J, Wu Y, Xi B, Xiao ZG, Xie G, Xie W, Xu H, Xu N, Xu QH, Xu Y, Xu Z, Xu Z, Yang C, Yang Q, Yang S, Yang Y, Ye Z, Ye Z, Yi L, Yip K, Yu Y, Zbroszczyk H, Zha W, Zhang C, Zhang D, Zhang J, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhang Z, Zhao J, Zhou C, Zhu X, Zhu Z, Zurek M, and Zyzak M
Abstract: According to first-principle lattice QCD calculations, the transition from quark-gluon plasma to hadronic matter is a smooth crossover in the region μ_{B}≤T_{c}. In this range the ratio, C_{6}/C_{2}, of net-baryon distributions are predicted to be negative. In this Letter, we report the first measurement of the midrapidity net-proton C_{6}/C_{2} from 27, 54.4, and 200 GeV Au+Au collisions at the Relativistic Heavy Ion Collider (RHIC). The dependence on collision centrality and kinematic acceptance in (p_{T}, y) are analyzed. While for 27 and 54.4 GeV collisions the C_{6}/C_{2} values are close to zero within uncertainties, it is observed that for 200 GeV collisions, the C_{6}/C_{2} ratio becomes progressively negative from peripheral to central collisions. Transport model calculations without critical dynamics predict mostly positive values except for the most central collisions within uncertainties. These observations seem to favor a smooth crossover in the high-energy nuclear collisions at top RHIC energy.
Published: 2021
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47. Probing Gluon Spin-Momentum Correlations in Transversely Polarized Protons through Midrapidity Isolated Direct Photons in p^{↑}+p Collisions at sqrt[s]=200 GeV.

Author: Acharya UA, Aidala C, Akiba Y, Alfred M, Andrieux V, Apadula N, Asano H, Azmoun B, Babintsev V, Bandara NS, Barish KN, Bathe S, Bazilevsky A, Beaumier M, Belmont R, Berdnikov A, Berdnikov Y, Bichon L, Blankenship B, Blau DS, Bok JS, Brooks ML, Bryslawskyj J, Bumazhnov V, Campbell S, Canoa Roman V, Cervantes R, Chi CY, Chiu M, Choi IJ, Choi JB, Citron Z, Connors M, Corliss R, Corrales Morales Y, Cronin N, Csanád M, Csörgő T, Danley TW, Daugherity MS, David G, DeBlasio K, Dehmelt K, Denisov A, Deshpande A, Desmond EJ, Dion A, Dixit D, Do JH, Drees A, Drees KA, Durham JM, Durum A, Enokizono A, En'yo H, Esha R, Esumi S, Fadem B, Fan W, Feege N, Fields DE, Finger M, Finger M, Fitzgerald D, Fokin SL, Frantz JE, Franz A, Frawley AD, Fukuda Y, Gal C, Gallus P, Garg P, Ge H, Giles M, Giordano F, Goto Y, Grau N, Greene SV, Grosse Perdekamp M, Gunji T, Guragain H, Hachiya T, Haggerty JS, Hahn KI, Hamagaki H, Hamilton HF, Han SY, Hanks J, Harvey M, Hasegawa S, Haseler TOS, He X, Hemmick TK, Hill JC, Hill K, Hodges A, Hollis RS, Homma K, Hong B, Hoshino T, Hotvedt N, Huang J, Huang S, Imai K, Inaba M, Iordanova A, Isenhower D, Ivanishchev D, Jacak BV, Jezghani M, Ji Z, Jiang X, Johnson BM, Jouan D, Jumper DS, Kang JH, Kapukchyan D, Karthas S, Kawall D, Kazantsev AV, Khachatryan V, Khanzadeev A, Khatiwada A, Kim C, Kim EJ, Kim M, Kincses D, Kingan A, Kistenev E, Klatsky J, Kline P, Koblesky T, Kotov D, Kudo S, Kurgyis B, Kurita K, Kwon Y, Lajoie JG, Larionova D, Lebedev A, Lee S, Lee SH, Leitch MJ, Leung YH, Lewis NA, Li X, Lim SH, Liu MX, Loggins VR, Lökös S, Loomis DA, Lovasz K, Lynch D, Majoros T, Makdisi YI, Makek M, Manko VI, Mannel E, McCumber M, McGaughey PL, McGlinchey D, McKinney C, Mendoza M, Mignerey AC, Milov A, Mishra DK, Mitchell JT, Mitrankov I, Mitrankova M, Mitsuka G, Miyasaka S, Mizuno S, Mondal MM, Montuenga P, Moon T, Morrison DP, Mulilo B, Murakami T, Murata J, Nagai K, Nagashima K, Nagashima T, Nagle JL, Nagy MI, Nakagawa I, Nakano K, Nattrass C, Nelson S, Niida T, Nouicer R, Novák T, Novitzky N, Nukazuka G, Nyanin AS, O'Brien E, Ogilvie CA, Orjuela Koop JD, Osborn JD, Oskarsson A, Ottino GJ, Ozawa K, Pantuev V, Papavassiliou V, Park JS, Park S, Pate SF, Patel M, Peng W, Perepelitsa DV, Perera GDN, Peressounko DY, PerezLara CE, Perry J, Petti R, Phipps M, Pinkenburg C, Pisani RP, Potekhin M, Pun A, Purschke ML, Radzevich PV, Ramasubramanian N, Read KF, Reynolds D, Riabov V, Riabov Y, Richford D, Rinn T, Rolnick SD, Rosati M, Rowan Z, Runchey J, Safonov AS, Sakaguchi T, Sako H, Samsonov V, Sarsour M, Sato S, Schaefer B, Schmoll BK, Sedgwick K, Seidl R, Sen A, Seto R, Sexton A, Sharma D, Sharma D, Shein I, Shibata TA, Shigaki K, Shimomura M, Shioya T, Shukla P, Sickles A, Silva CL, Silvermyr D, Singh BK, Singh CP, Singh V, Slunečka M, Smith KL, Snowball M, Soltz RA, Sondheim WE, Sorensen SP, Sourikova IV, Stankus PW, Stoll SP, Sugitate T, Sukhanov A, Sumita T, Sun J, Sun Z, Sziklai J, Tanida K, Tannenbaum MJ, Tarafdar S, Taranenko A, Tarnai G, Tieulent R, Timilsina A, Todoroki T, Tomášek M, Towell CL, Towell RS, Tserruya I, Ueda Y, Ujvari B, van Hecke HW, Velkovska J, Virius M, Vrba V, Vukman N, Wang XR, Watanabe YS, Wong CP, Woody CL, Xu C, Xu Q, Xue L, Yalcin S, Yamaguchi YL, Yamamoto H, Yanovich A, Yoo JH, Yoon I, Yu H, Yushmanov IE, Zajc WA, Zelenski A, Zharko S, and Zou L
Abstract: Studying spin-momentum correlations in hadronic collisions offers a glimpse into a three-dimensional picture of proton structure. The transverse single-spin asymmetry for midrapidity isolated direct photons in p^{↑}+p collisions at sqrt[s]=200 GeV is measured with the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). Because direct photons in particular are produced from the hard scattering and do not interact via the strong force, this measurement is a clean probe of initial-state spin-momentum correlations inside the proton and is in particular sensitive to gluon interference effects within the proton. This is the first time direct photons have been used as a probe of spin-momentum correlations at RHIC. The uncertainties on the results are a 50-fold improvement with respect to those of the one prior measurement for the same observable, from the Fermilab E704 experiment. These results constrain gluon spin-momentum correlations in transversely polarized protons.
Published: 2021
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48. Observation of D_{s}^{±}/D^{0} Enhancement in Au+Au Collisions at sqrt[s_{NN}]=200 GeV.

Author: 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 FH, 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, 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, Fu C, Fulek L, Gagliardi CA, Galatyuk T, Geurts F, Ghimire N, Gibson A, Gopal K, Gou X, Grosnick D, Guryn W, Hamad AI, Hamed A, Harabasz S, Harris JW, He S, He W, He X, 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, 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, Mooney I, Moravcova Z, Morozov DA, Nagy M, Nam JD, Nasim M, 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, Pokhrel BR, 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, and Zyzak M
Abstract: We report on the first measurement of charm-strange meson D_{s}^{±} production at midrapidity in Au+Au collisions at sqrt[s_{NN}]=200 GeV from the STAR experiment. The yield ratio between strange (D_{s}^{±}) and nonstrange (D^{0}) open-charm mesons is presented and compared to model calculations. A significant enhancement, relative to a pythia simulation of p+p collisions, is observed in the D_{s}^{±}/D^{0} yield ratio in Au+Au collisions over a large range of collision centralities. Model calculations incorporating abundant strange-quark production in the quark-gluon plasma and coalescence hadronization qualitatively reproduce the data. The transverse-momentum integrated yield ratio of D_{s}^{±}/D^{0} at midrapidity is consistent with a prediction from a statistical hadronization model with the parameters constrained by the yields of light and strange hadrons measured at the same collision energy. These results suggest that the coalescence of charm quarks with strange quarks in the quark-gluon plasma plays an important role in D_{s}^{±}-meson production in heavy-ion collisions.
Published: 2021
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49. Measurement of e^{+}e^{-} Momentum and Angular Distributions from Linearly Polarized Photon Collisions.

Author: 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 FH, Chang Z, Chankova-Bunzarova N, Chatterjee A, Chen D, Chen JH, Chen X, Chen Z, Cheng J, Cherney M, Chevalier M, Choudhury S, Christie W, Crawford HJ, Csanád M, Daugherity M, Dedovich TG, Deppner IM, Derevschikov AA, Didenko L, Dong X, Drachenberg JL, Dunlop JC, Edmonds T, Elsey N, Engelage J, Eppley G, Esha R, 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, Grosnick D, Hamad AI, Hamed A, Harris JW, He S, He W, He X, 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, Kisiel A, Klein SR, Kocan M, Kochenda L, Kosarzewski LK, Kramarik L, Kravtsov P, Krueger K, Kulathunga Mudiyanselage N, Kumar L, Kunnawalkam Elayavalli R, Kwasizur JH, Lacey R, Lan S, Landgraf JM, Lauret J, Lebedev A, Lednicky R, Lee JH, Leung YH, 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, Mooney I, Moravcova Z, Morozov DA, Nagy M, Nam JD, Nasim M, Nayak K, Neff D, Nelson JM, Nemes DB, Nie M, Nigmatkulov G, Niida T, Nogach LV, Nonaka T, 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, Roberts JB, 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, Shen F, Shen WQ, Shi SS, 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 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, Zbroszczyk H, Zha W, Zhang D, Zhang S, Zhang S, Zhang XP, Zhang Y, Zhang Y, Zhang ZJ, Zhang Z, Zhao J, Zhong C, Zhou C, Zhu X, Zhu Z, Zurek M, and Zyzak M
Abstract: The Breit-Wheeler process which produces matter and antimatter from photon collisions is experimentally investigated through the observation of 6085 exclusive electron-positron pairs in ultraperipheral Au+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements reveal a large fourth-order angular modulation of cos4Δϕ=(16.8±2.5)% and smooth invariant mass distribution absent of vector mesons (ϕ, ω, and ρ) at the experimental limit of ≤0.2% of the observed yields. The differential cross section as a function of e^{+}e^{-} pair transverse momentum P_{⊥} peaks at low value with sqrt[⟨P_{⊥}^{2}⟩]=38.1±0.9 MeV and displays a significant centrality dependence. These features are consistent with QED calculations for the collision of linearly polarized photons quantized from the extremely strong electromagnetic fields generated by the highly charged Au nuclei at ultrarelativistic speed. The experimental results have implications for vacuum birefringence and for mapping the magnetic field which is important for emergent QCD phenomena.
Published: 2021
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50. Global Polarization of Ξ and Ω Hyperons in Au+Au Collisions at sqrt[s_{NN}]=200 GeV.

Author: 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 FH, 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, 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, Ghimire N, 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, 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, Mooney I, Moravcova Z, Morozov DA, Nagy M, Nam JD, Nasim M, 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, Pokhrel BR, 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, and Zyzak M
Abstract: Global polarization of Ξ and Ω hyperons has been measured for the first time in Au+Au collisions at sqrt[s_{NN}]=200 GeV. The measurements of the Ξ^{-} and Ξ[over ¯]^{+} hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay Ξ→Λ+π, as well as by measuring the polarization of the daughter Λ hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over Ξ^{-} and Ξ[over ¯]^{+}, is measured to be ⟨P_{Ξ}⟩=0.47±0.10(stat)±0.23(syst)% for the collision centrality 20%-80%. The ⟨P_{Ξ}⟩ is found to be slightly larger than the inclusive Λ polarization and in reasonable agreement with a multiphase transport model. The ⟨P_{Ξ}⟩ is found to follow the centrality dependence of the vorticity predicted in the model, increasing toward more peripheral collisions. The global polarization of Ω, ⟨P_{Ω}⟩=1.11±0.87(stat)±1.97(syst)% was obtained by measuring the polarization of daughter Λ in the decay Ω→Λ+K, assuming the polarization transfer factor C_{ΩΛ}=1.
Published: 2021
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