Onset of pi(0) suppression studied in Cu+Cu collisions at sqrt S NN=22.4, 62.4, and 200 GeV.
Journal: Physical Review Letters
Published:
Abstract
Neutral pion transverse momentum (p(T)) spectra at midrapidity (|y| less than or approximately 0.35) were measured in Cu+Cu collisions at sqrt[s(NN)]=22.4, 62.4, and 200 GeV. Relative to pi_(0) yields in p+p collisions scaled by the number of inelastic nucleon-nucleon collisions (N(coll) the pi_(0) yields for p(T) more than or approximately 2 GeV/c in central Cu+Cu collisions are suppressed at 62.4 and 200 GeV whereas an enhancement is observed at 22.4 GeV. A comparison with a jet-quenching model suggests that final state parton energy loss dominates in central Cu+Cu collisions at 62.4 and 200 GeV, while the enhancement at 22.4 GeV is consistent with nuclear modifications in the initial state alone.
Authors
A Adare, S Afanasiev, C Aidala, N Ajitanand, Y Akiba, H Al Bataineh, J Alexander, K Aoki, L Aphecetche, R Armendariz, S Aronson, J Asai, E Atomssa, R Averbeck, T Awes, B Azmoun, V Babintsev, M Bai, G Baksay, L Baksay, A Baldisseri, K Barish, P Barnes, B Bassalleck, A Basye, S Bathe, S Batsouli, V Baublis, C Baumann, A Bazilevsky, S Belikov, R Bennett, A Berdnikov, Y Berdnikov, A Bickley, J Boissevain, H Borel, K Boyle, M Brooks, H Buesching, V Bumazhnov, G Bunce, S Butsyk, C Camacho, S Campbell, B Chang, W Chang, J-l Charvet, S Chernichenko, J Chiba, C Chi, M Chiu, I Choi, R Choudhury, T Chujo, P Chung, A Churyn, V Cianciolo, Z Citron, C Cleven, B Cole, M Comets, P Constantin, M Csanád, T Csörgo, T Dahms, S Dairaku, K Das, G David, M Deaton, K Dehmelt, H Delagrange, A Denisov, D D'enterria, A Deshpande, E Desmond, O Dietzsch, A Dion, M Donadelli, O Drapier, A Drees, K Drees, A Dubey, A Durum, D Dutta, V Dzhordzhadze, Y Efremenko, J Egdemir, F Ellinghaus, W Emam, T Engelmore, A Enokizono, H En'yo, S Esumi, K Eyser, B Fadem, D Fields, M Finger, M Finger, F Fleuret, S Fokin, Z Fraenkel, J Frantz, A Franz, A Frawley, K Fujiwara, Y Fukao, T Fusayasu, S Gadrat, I Garishvili, A Glenn, H Gong, M Gonin, J Gosset, Y Goto, R Granier De Cassagnac, N Grau, S Greene, M Grosse Perdekamp, T Gunji, H-a Gustafsson, T Hachiya, A Hadj Henni, C Haegemann, J Haggerty, H Hamagaki, R Han, H Harada, E Hartouni, K Haruna, E Haslum, R Hayano, M Heffner, T Hemmick, T Hester, X He, H Hiejima, J Hill, R Hobbs, M Hohlmann, W Holzmann, K Homma, B Hong, T Horaguchi, D Hornback, S Huang, T Ichihara, R Ichimiya, Y Ikeda, K Imai, J Imrek, M Inaba, Y Inoue, D Isenhower, L Isenhower, M Ishihara, T Isobe, M Issah, A Isupov, D Ivanischev, B Jacak, J Jia, J Jin, O Jinnouchi, B Johnson, K Joo, D Jouan, F Kajihara, S Kametani, N Kamihara, J Kamin, M Kaneta, J Kang, H Kanou, J Kapustinsky, D Kawall, A Kazantsev, T Kempel, A Khanzadeev, K Kijima, J Kikuchi, B Kim, D Kim, D Kim, E Kim, S Kim, E Kinney, K Kiriluk, A Kiss, E Kistenev, A Kiyomichi, J Klay, C Klein Boesing, L Kochenda, V Kochetkov, B Komkov, M Konno, J Koster, D Kotchetkov, A Kozlov, A Král, A Kravitz, J Kubart, G Kunde, N Kurihara, K Kurita, M Kurosawa, M Kweon, Y Kwon, G Kyle, R Lacey, Y-s Lai, Y Lai, J Lajoie, D Layton, A Lebedev, D Lee, K Lee, M Lee, T Lee, M Leitch, M A Leite, B Lenzi, P Liebing, T Liska, A Litvinenko, H Liu, M Liu, X Li, B Love, D Lynch, C Maguire, Y Makdisi, A Malakhov, M Malik, V Manko, E Mannel, Y Mao, L Masek, H Masui, F Matathias, M Mccumber, P Mcgaughey, N Means, B Meredith, Y Miake, P Mikes, K Miki, T Miller, A Milov, S Mioduszewski, M Mishra, J Mitchell, M Mitrovski, A Mohanty, Y Morino, A Morreale, D Morrison, T Moukhanova, D Mukhopadhyay, J Murata, S Nagamiya, Y Nagata, J Nagle, M Naglis, M Nagy, I Nakagawa, Y Nakamiya, T Nakamura, K Nakano, J Newby, M Nguyen, T Niita, B Norman, R Nouicer, A Nyanin, E O'brien, S Oda, C Ogilvie, H Ohnishi, H Okada, K Okada, M Oka, O Omiwade, Y Onuki, A Oskarsson, M Ouchida, K Ozawa, R Pak, D Pal, A P Palounek, V Pantuev, V Papavassiliou, J Park, W Park, S Pate, H Pei, J-c Peng, H Pereira, V Peresedov, D Peressounko, C Pinkenburg, M Purschke, A Purwar, H Qu, J Rak, A Rakotozafindrabe, I Ravinovich, K Read, S Rembeczki, M Reuter, K Reygers, V Riabov, Y Riabov, D Roach, G Roche, S Rolnick, A Romana, M Rosati, S Rosendahl, P Rosnet, P Rukoyatkin, P Ruzicka, V Rykov, B Sahlmueller, N Saito, T Sakaguchi, S Sakai, K Sakashita, H Sakata, V Samsonov, S Sato, T Sato, S Sawada, K Sedgwick, J Seele, R Seidl, A Semenov, V Semenov, R Seto, D Sharma, I Shein, A Shevel, T-a Shibata, K Shigaki, M Shimomura, K Shoji, P Shukla, A Sickles, C Silva, D Silvermyr, C Silvestre, K Sim, B Singh, C Singh, V Singh, S Skutnik, M Slunecka, A Soldatov, R Soltz, W Sondheim, S Sorensen, I Sourikova, F Staley, P Stankus, E Stenlund, M Stepanov, A Ster, S Stoll, T Sugitate, C Suire, A Sukhanov, J Sziklai, T Tabaru, S Takagi, E Takagui, A Taketani, R Tanabe, Y Tanaka, K Tanida, M Tannenbaum, A Taranenko, P Tarján, H Themann, T Thomas, M Togawa, A Toia, J Tojo, L Tomásek, Y Tomita, H Torii, R Towell, V-n Tram, I Tserruya, Y Tsuchimoto, C Vale, H Valle, H Vanhecke, A Veicht, J Velkovska, R Vertesi, A Vinogradov, M Virius, V Vrba, E Vznuzdaev, M Wagner, D Walker, X Wang, Y Watanabe, F Wei, J Wessels, S White, D Winter, C Woody, M Wysocki, W Xie, Y Yamaguchi, K Yamaura, R Yang, A Yanovich, Z Yasin, J Ying, S Yokkaichi, G Young, I Younus, I Yushmanov, W Zajc, O Zaudtke, C Zhang, S Zhou, J Zimányi, L Zolin