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J/ψ polarization in p+p collisions at s=200 GeV in STAR

  • Author(s): Adamczyk, L
  • Adkins, JK
  • Agakishiev, G
  • Aggarwal, MM
  • Ahammed, Z
  • Alekseev, I
  • Alford, J
  • Anson, CD
  • Aparin, A
  • Arkhipkin, D
  • Aschenauer, EC
  • Averichev, GS
  • Balewski, J
  • Banerjee, A
  • Barnovska, Z
  • Beavis, DR
  • Bellwied, R
  • Bhasin, A
  • Bhati, AK
  • Bhattarai, P
  • Bichsel, H
  • Bielcik, J
  • Bielcikova, J
  • Bland, LC
  • Bordyuzhin, IG
  • Borowski, W
  • Bouchet, J
  • Brandin, AV
  • Brovko, SG
  • Bültmann, S
  • Bunzarov, I
  • Burton, TP
  • Butterworth, J
  • Caines, H
  • Calderón de la Barca Sánchez, M
  • Cebra, D
  • Cendejas, R
  • Cervantes, MC
  • Chaloupka, P
  • Chang, Z
  • Chattopadhyay, S
  • Chen, HF
  • Chen, JH
  • Chen, L
  • Cheng, J
  • Cherney, M
  • Chikanian, A
  • Christie, W
  • Chwastowski, J
  • Codrington, MJM
  • Corliss, R
  • Cramer, JG
  • Crawford, HJ
  • Cui, X
  • Das, S
  • Davila Leyva, A
  • De Silva, LC
  • Debbe, RR
  • Dedovich, TG
  • Deng, J
  • Derevschikov, AA
  • Derradi de Souza, R
  • Dhamija, S
  • di Ruzza, B
  • Didenko, L
  • Dilks, C
  • Ding, F
  • Djawotho, P
  • Dong, X
  • Drachenberg, JL
  • Draper, JE
  • Du, CM
  • Dunkelberger, LE
  • Dunlop, JC
  • Efimov, LG
  • Engelage, J
  • Engle, KS
  • Eppley, G
  • Eun, L
  • Evdokimov, O
  • Fatemi, R
  • Fazio, S
  • Fedorisin, J
  • Filip, P
  • Finch, E
  • Fisyak, Y
  • Flores, CE
  • Gagliardi, CA
  • Gangadharan, DR
  • Garand, D
  • Geurts, F
  • Gibson, A
  • Girard, M
  • Gliske, S
  • Grosnick, D
  • Guo, Y
  • Gupta, A
  • Gupta, S
  • Guryn, W
  • Haag, B
  • Hajkova, O
  • Hamed, A
  • Han, L-X
  • Haque, R
  • Harris, JW
  • Hays-Wehle, JP
  • Heppelmann, S
  • Hirsch, A
  • Hoffmann, GW
  • Hofman, DJ
  • Horvat, S
  • Huang, B
  • Huang, HZ
  • Huang, X
  • Huck, P
  • Humanic, TJ
  • Igo, G
  • Jacobs, WW
  • Jang, H
  • Judd, EG
  • Kabana, S
  • Kalinkin, D
  • Kang, K
  • Kauder, K
  • Ke, HW
  • Keane, D
  • Kechechyan, A
  • Kesich, A
  • Khan, ZH
  • Kikola, DP
  • Kisel, I
  • Kisiel, A
  • Koetke, DD
  • Kollegger, T
  • Konzer, J
  • Koralt, I
  • Korsch, W
  • Kotchenda, L
  • Kravtsov, P
  • Krueger, K
  • Kulakov, I
  • Kumar, L
  • Kycia, RA
  • Lamont, MAC
  • Landgraf, JM
  • Landry, KD
  • Lauret, J
  • Lebedev, A
  • Lednicky, R
  • Lee, JH
  • Leight, W
  • LeVine, MJ
  • Li, C
  • Li, W
  • Li, X
  • Li, X
  • Li, Y
  • Li, ZM
  • Lima, LM
  • Lisa, MA
  • Liu, F
  • Ljubicic, T
  • Llope, WJ
  • Longacre, RS
  • Luo, X
  • Ma, GL
  • Ma, YG
  • Madagodagettige Don, DMMD
  • Mahapatra, DP
  • Majka, R
  • Margetis, S
  • Markert, C
  • Masui, H
  • Matis, HS
  • McDonald, D
  • McShane, TS
  • Minaev, NG
  • Mioduszewski, S
  • Mohanty, B
  • Mondal, MM
  • Morozov, DA
  • Munhoz, MG
  • Mustafa, MK
  • Nandi, BK
  • Nasim, Md
  • Nayak, TK
  • Nelson, JM
  • Nogach, LV
  • Noh, SY
  • Novak, J
  • Nurushev, SB
  • Odyniec, G
  • Ogawa, A
  • Oh, K
  • Ohlson, A
  • Okorokov, V
  • Oldag, EW
  • Oliveira, RAN
  • Pachr, M
  • Page, BS
  • Pal, SK
  • Pan, YX
  • Pandit, Y
  • Panebratsev, Y
  • Pawlak, T
  • Pawlik, B
  • Pei, H
  • Perkins, C
  • Peryt, W
  • Pile, P
  • Planinic, M
  • Pluta, J
  • Plyku, D
  • Poljak, N
  • Porter, J
  • Poskanzer, AM
  • Pruthi, NK
  • Przybycien, M
  • Pujahari, PR
  • Qiu, H
  • Quintero, A
  • Ramachandran, S
  • Raniwala, R
  • Raniwala, S
  • Ray, RL
  • Riley, CK
  • Ritter, HG
  • Roberts, JB
  • Rogachevskiy, OV
  • Romero, JL
  • Ross, JF
  • Roy, A
  • Ruan, L
  • Rusnak, J
  • Sahoo, NR
  • Sahu, PK
  • Sakrejda, I
  • Salur, S
  • Sandacz, A
  • Sandweiss, J
  • Sangaline, E
  • Sarkar, A
  • Schambach, J
  • Scharenberg, RP
  • Schmah, AM
  • Schmidke, WB
  • Schmitz, N
  • Seger, J
  • Seyboth, P
  • Shah, N
  • Shahaliev, E
  • Shanmuganathan, PV
  • Shao, M
  • Sharma, B
  • Shen, WQ
  • Shi, SS
  • Shou, QY
  • Sichtermann, EP
  • Singaraju, RN
  • Skoby, MJ
  • Smirnov, D
  • Smirnov, N
  • Solanki, D
  • Sorensen, P
  • deSouza, UG
  • Spinka, HM
  • Srivastava, B
  • Stanislaus, TDS
  • Stevens, JR
  • Stock, R
  • Strikhanov, M
  • Stringfellow, B
  • Suaide, AAP
  • Sumbera, M
  • Sun, X
  • Sun, XM
  • Sun, Y
  • Sun, Z
  • Surrow, B
  • Svirida, DN
  • Symons, TJM
  • Szanto de Toledo, A
  • Takahashi, J
  • Tang, AH
  • Tang, Z
  • Tarnowsky, T
  • Thomas, JH
  • Timmins, AR
  • Tlusty, D
  • Tokarev, M
  • Trentalange, S
  • Tribble, RE
  • Tribedy, P
  • Trzeciak, BA
  • Tsai, OD
  • Turnau, J
  • Ullrich, T
  • Underwood, DG
  • Van Buren, G
  • van Nieuwenhuizen, G
  • Vanfossen, JA
  • Varma, R
  • Vasconcelos, GMS
  • Vasiliev, AN
  • Vertesi, R
  • Videbæk, F
  • Viyogi, YP
  • Vokal, S
  • Vossen, A
  • Wada, M
  • Walker, M
  • Wang, F
  • Wang, G
  • Wang, H
  • Wang, JS
  • Wang, XL
  • Wang, Y
  • Wang, Y
  • Webb, G
  • Webb, JC
  • Westfall, GD
  • Wieman, H
  • Wissink, SW
  • Witt, R
  • Wu, YF
  • Xiao, Z
  • Xie, W
  • Xin, K
  • Xu, H
  • Xu, N
  • Xu, QH
  • Xu, Y
  • Xu, Z
  • Yan, W
  • Yang, C
  • Yang, Y
  • Yang, Y
  • Ye, Z
  • Yepes, P
  • Yi, L
  • Yip, K
  • Yoo, I-K
  • Zawisza, Y
  • Zbroszczyk, H
  • Zha, W
  • Zhang, JB
  • Zhang, JL
  • Zhang, S
  • Zhang, XP
  • Zhang, Y
  • Zhang, ZP
  • Zhao, F
  • Zhao, J
  • Zhong, C
  • Zhu, X
  • Zhu, YH
  • Zoulkarneeva, Y
  • Zyzak, M
  • et al.
Abstract

© 2014 The Authors. We report on a polarization measurement of inclusive J/ψ mesons in the di-electron decay channel at mid-rapidity at 2 < pT < 6 GeV/c in p + p collisions at √s = 200 GeV. Data were taken with the STAR detector at RHIC. The J/ψ polarization measurement should help to distinguish between the different models of the J/ψ production mechanism since they predict different pT dependences of the J/ψ polarization. In this analysis, J/ψ polarization is studied in the helicity frame. The polarization parameter λθ measured at RHIC becomes smaller towards high pT , indicating more longitudinal J/ψ polarization as pT increases. The result is compared with predictions of presently available models.

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