학술논문
Improved measurement of double helicity asymmetry in inclulsive midrapidity pi(0) production for polarized p+p collisions at root s=200 GeV
Document Type
Author
Adler, SS; Afanasiev, S; Aidala, C; Ajitanand, NN; Akiba, Y; Al-Jamel, A; Alexander, J; Aoki, K; Aphecetche, L; Armendariz, R; Aronson, SH; Averbeck, R; Awes, TC; Azmoun, B; Babintsev, V; Baldisseri, A; Barish, KN; Barnes, PD; Bassalleck, B; Bathe, S; Batsouli, S; Baublis, V; Bauer, F; Bazilevsky, A; Belikov, S; Bennett, R; Berdnikov, Y; Bjorndal, MT; Boissevain, JG; Borel, H; Boyle, K; Brooks, ML; Brown, DS; Bruner, N; Bucher, D; Buesching, H; Bumazhnov, V; Bunce, G; Burward-Hoy, JM; Butsyk, S; Camard, X; Campbell, S; Chai, JS; Chand, P; Chang, WC; Chernichenko, S; Chi, CY; Chiba, J; Chiu, M; Choi, IJ; Choudhury, RK; Chujo, T; Cianciolo, V; Cleven, CR; Cobigo, Y; Cole, BA; Comets, MP; Constantin, P; Csanad, M; Csorgo, T; Cussonneau, JP; d'Enterria, D; Dahms, T; Das, K; David, G; Deak, F; Delagrange, H; Denisov, A; Deshpande, A; Desmond, EJ; Devismes, A; Dietzsch, O; Dion, A; Drachenberg, JL; Drapier, O; Drees, A; Dubey, AK; Durum, A; Dutta, D; Dzhordzhadze, V; Efremenko, YV; Egdemir, J; Enokizono, A; En'yo, H; Espagnon, B; Esumi, S; Fields, DE; Finck, C; Fleuret, F; Fokin, SL; Forestier, B; Fox, BD; Fraenkel, Z; Frantz, JE; Franz, A; Frawley, AD; Fukao, Y; Fung, SY; Gadrat, S; Gastineau, F; Germain, M; Glenn, A; Gonin, M; Gosset, J; Goto, Y; de Cassagnac, RG; Grau, N; Greene, SV; Perdekamp, MG; Gunji, T; Gustafsson, Hans-Åke; Hachiya, T; Henni, AH; Haggerty, JS; Hagiwara, MN; Hamagaki, H; Hansen, AG; Harada, H; Hartouni, EP; Haruna, K; Harvey, M; Haslum, Eva; Hasuko, K; Hayano, R; He, X; Heffner, M; Hemmick, TK; Heuser, JM; Hidas, P; Hiejima, H; Hill, JC; Hobbs, R; Holmes, M; Holzmann, W; Homma, K; Hong, B; Hoover, A; Horaguchi, T; Hur, MG; Ichihara, T; Ikonnikov, VV; Imai, K; Inaba, M; Inuzuka, M; Isenhower, D; Isenhower, L; Ishihara, M; Isobe, T; Issah, M; Isupov, A; Jacak, BV; Jia, J; Jin, J; Jinnouchi, O; Johnson, BM; Johnson, SC; Joo, KS; Jouan, D; Kajihara, F; Kametani, S; Kamihara, N; Kaneta, M; Kang, JH; Katou, K; Kawabata, T; Kawagishi, T; Kazantsev, AV; Kelly, S; Khachaturov, B; Khanzadeev, A; Kikuchi, J; Kim, DJ; Kim, E; Kim, GB; Kim, HJ; Kim, YS; Kinney, E; Kiss, A; Kistenev, E; Kiyomichi, A; Klein-Boesing, C; Kobayashi, H; Kochenda, L; Kochetkov, V; Kohara, R; Komkov, B; Konno, M; Kotchetkov, D; Kozlov, A; Kroon, PJ; Kuberg, CH; Kunde, GJ; Kurihara, N; Kurita, K; Kweon, MJ; Kwon, Y; Kyle, GS; Lacey, R; Lajoie, JG; Le Bornec, Y; Lebedev, A; Leckey, S; Lee, DM; Lee, MK; Leitch, MJ; Leite, MAL; Li, XH; Lim, H; Litvinenko, A; Liu, MX; Maguire, CF; Makdisi, YI; Malakhov, A; Malik, MD; Manko, VI; Mao, Y; Martinez, G; Masui, H; Matathias, F; Matsumoto, T; McCain, MC; McGaughey, PL; Miake, Y; Miller, TE; Milov, A; Mioduszewski, S; Mishra, GC; Mitchell, JT; Mohanty, AK; Morrison, DP; Moss, JM; Moukhanova, TV; Mukhopadhyay, D; Muniruzzaman, M; Murata, J; Nagamiya, S; Nagata, Y; Nagle, JL; Naglis, M; Nakamura, T; Newby, J; Nguyen, M; Norman, BE; Nyanin, AS; Nystrand, Joakim; O'Brien, E; Ogilvie, CA; Ohnishi, H; Ojha, ID; Okada, H; Okada, K; Omiwade, OO; Oskarsson, Anders; Otterlund, Ingvar; Oyama, K; Ozawa, K; Pal, D; Palounek, APT; Pantuev, V; Papavassiliou, V; Park, J; Park, WJ; Pate, SF; Pei, H; Penev, V; Peng, JC; Pereira, H; Peresedov, V; Peressounko, DY; Pierson, A; Pinkenburg, C; Pisani, RP; Purschke, ML; Purwar, AK; Qu, H; Qualls, JM; Rak, J; Ravinovich, I; Read, KF; Reuter, M; Reygers, K; Riabov, V; Riabov, Y; Roche, G; Romana, A; Rosati, M; Rosendahl, Sarah; Rosnet, P; Rukoyatkin, P; Rykov, VL; Ryu, SS; Sahlmueller, B; Saito, N; Sakaguchi, T; Sakai, S; Samsonov, V; Sanfratello, L; Santo, R; Sato, HD; Sato, S; Sawada, S; Schutz, Y; Semenov, V; Seto, R; Sharma, D; Shea, TK; Shein, I; Shibata, TA; Shigaki, K; Shimomura, M; Shohjoh, T; Shoji, K; Sickles, A; Silva, CL; Silvermyr, D; Sim, KS; Singh, CP; Singh, V; Skutnik, S; Smith, WC; Soldatov, A; Soltz, RA; Sondheim, WE; Sourikova, IV; Staley, F; Stankus, PW; Stenlund, Evert; Stepanov, M; Ster, A; Stoll, SP; Sugitate, T; Suire, C; Sullivan, JP; Sziklai, J; Tabaru, T; Takagi, S; Takagui, EM; Taketani, A; Tanaka, KH; Tanaka, Y; Tanida, K; Tannenbaum, MJ; Taranenko, A; Tarjan, P; Thomas, TL; Togawa, M; Tojo, J; Torii, H; Towell, RS; Tram, VN; Tserruya, I; Tsuchimoto, Y; Tuli, SK; Tydesjö, Henrik; Tyurin, N; Uam, TJ; Valle, H; van Hecke, HW; Velkovska, J; Velkovsky, M; Vertesi, R; Veszpremi, V; Vinogradov, AA; Volkov, MA; Vznuzdaev, E; Wagner, M; Wang, XR; Watanabe, Y; Wessels, J; White, SN; Willis, N; Winter, D; Wohn, FK; Woody, CL; Wysocki, M; Xie, W; Yanovich, A; Yokkaichi, S; Young, GR; Younus, I; Yushmanov, IE; Zajc, WA; Zaudtke, O; Zhang, C; Zhou, S; Zimanyi, J; Zolin, L; Zong, X
Source
Physical Review D (Particles, Fields, Gravitation and Cosmology). 73(9)
Subject
Language
English
ISSN
1550-2368
Abstract
We present an improved measurement of the double helicity asymmetry for pi(0) production in polarized proton-proton scattering at root s=200 GeV employing the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The improvements to our previous measurement come from two main factors: Inclusion of a new data set from the 2004 RHIC run with higher beam polarizations than the earlier run and a recalibration of the beam polarization measurements for the earlier run, which resulted in reduced uncertainties and increased beam polarizations. The results are compared to a Next to Leading Order (NLO) perturbative Quantum Chromodynamics (pQCD) calculation with a range of polarized gluon distributions.