Suppression of Back-to-Back Hadron Pairs at Forward Rapidity in d+Au Collisions at √sNN=200  GeV

Adare, A.; Afanasiev, S.; Aidala, C.; Ajitanand, N.; Akiba, Y.; Al-Bataineh, H.; Alexander, J.; Angerami, A.; Aoki, K.; Apadula, N.; Aramaki, Y.; Atomssa, E.; Averbeck, R.; Awes, T.; Azmoun, B.; Babintsev, V.; Bai, M.; Baksay, G.; Baksay, L.; Barish, K.; Bassalleck, B.; Basye, A.; Bathe, S.; Baublis, V.; Baumann, C.; Bazilevsky, A.; Belikov, S.; Belmont, R.; Bennett, R.; Berdnikov, A.; Berdnikov, Y.; Bhom, J.; Blau, D.; Bok, J.; Boyle, K.; Brooks, M.; Buesching, H.; Bumazhnov, V.; Bunce, G.; Butsyk, S.; Campbell, S.; Caringi, A.; Chen, C.-H.; Chi, C.; Chiu, M.; Choi, I.; Choi, J.; Choudhury, R.; Christiansen, P.; Chujo, T.; Chung, P.; Chvala, O.; Cianciolo, V.; Citron, Z.; Cole, B.; Conesa del Valle, Z.; Connors, M.; Csanád, M.; Csörgő, T.; Dahms, T.; Dairaku, S.; Danchev, I.; Das, K.; Datta, A.; David, G.; Dayananda, M.; Denisov, A.; Deshpande, A.; Desmond, E.; Dharmawardane, K.; Dietzsch, O.; Dion, A.; Donadelli, M.; Drapier, O.; Drees, A.; Drees, K.; Durham, J.; Durum, A.; Dutta, D.; D’Orazio, L.; Edwards, S.; Efremenko, Y.; Ellinghaus, F.; Engelmore, T.; Enokizono, A.; En’yo, H.; Esumi, S.; Fadem, B.; Fields, D.; Finger, M.; Finger, M.; Fleuret, F.; Fokin, S.; Fraenkel, Z.; Frantz, J.; Franz, A.; Frawley, A.; Fujiwara, K.; Fukao, Y.; Fusayasu, T.; Garishvili, I.; Glenn, A.; Gong, H.; Gonin, M.; Goto, Y.; Granier de Cassagnac, R.; Grau, N.; Greene, S.; Grim, G.; Grosse Perdekamp, M.; Gunji, T.; Gustafsson, H.-Å.; Haggerty, J.; Hahn, K.; Hamagaki, H.; Hamblen, J.; Han, R.; Hanks, J.; Haslum, E.; Hayano, R.; He, X.; Heffner, M.; Hemmick, T.; Hester, T.; Hill, J.; Hohlmann, M.; Holzmann, W.; Homma, K.; Hong, B.; Horaguchi, T.; Hornback, D.; Huang, S.; Ichihara, T.; Ichimiya, R.; Ikeda, Y.; Imai, K.; Inaba, M.; Isenhower, D.; Ishihara, M.; Issah, M.; Isupov, A.; Ivanischev, D.; Iwanaga, Y.; Jacak, B.; Jia, J.; Jiang, X.; Jin, J.; Johnson, B.; Jones, T.; Joo, K.; Jouan, D.; Jumper, D.; Kajihara, F.; Kamin, J.; Kang, J.; Kapustinsky, J.; Karatsu, K.; Kasai, M.; Kawall, D.; Kawashima, M.; Kazantsev, A.; Kempel, T.; Khanzadeev, A.; Kijima, K.; Kikuchi, J.; Kim, A.; Kim, B.; Kim, D.; Kim, E.; Kim, Y.-J.; Kinney, E.; Kiss, Á.; Kistenev, E.; Kochenda, L.; Komkov, B.; Konno, M.; Koster, J.; Král, A.; Kravitz, A.; Kunde, G.; Kurita, K.; Kurosawa, M.; Kwon, Y.; Kyle, G.; Lacey, R.; Lai, Y.; Lajoie, J.; Lebedev, A.; Lee, D.; Lee, J.; Lee, K.; Lee, K.; Leitch, M.; Leite, M.; Li, X.; Lichtenwalner, P.; Liebing, P.; Linden Levy, L.; Liška, T.; Litvinenko, A.; Liu, H.; Liu, M.; Love, B.; Lynch, D.; Maguire, C.; Makdisi, Y.; Malakhov, A.; Malik, M.; Manko, V.; Mannel, E.; Mao, Y.; Masui, H.; Matathias, F.; McCumber, M.; McGaughey, P.; Means, N.; Meredith, B.; Miake, Y.; Mibe, T.; Mignerey, A.; Miki, K.; Milov, A.; Mitchell, J.; Mohanty, A.; Moon, H.; Morino, Y.; Morreale, A.; Morrison, D.; Moukhanova, T.; Murakami, T.; Murata, J.; Nagamiya, S.; Nagle, J.; Naglis, M.; Nagy, M.; Nakagawa, I.; Nakamiya, Y.; Nakamura, K.; Nakamura, T.; Nakano, K.; Nam, S.; Newby, J.; Nguyen, M.; Nihashi, M.; Nouicer, R.; Nyanin, A.; Oakley, C.; O’Brien, E.; Oda, S.; Ogilvie, C.; Oka, M.; Okada, K.; Onuki, Y.; Oskarsson, A.; Ouchida, M.; Ozawa, K.; Pak, R.; Pantuev, V.; Papavassiliou, V.; Park, I.; Park, S.; Park, W.; Pate, S.; Pei, H.; Peng, J.-C.; Pereira, H.; Peresedov, V.; Peressounko, D.; Petti, R.; Pinkenburg, C.; Pisani, R.; Proissl, M.; Purschke, M.; Qu, H.; Rak, J.; Ravinovich, I.; Read, K.; Reygers, K.; Riabov, V.; Riabov, Y.; Richardson, E.; Roach, D.; Roche, G.; Rolnick, S.; Rosati, M.; Rosen, C.; Rosendahl, S.; Rukoyatkin, P.; Ružička, P.; Sahlmueller, B.; Saito, N.; Sakaguchi, T.; Sakashita, K.; Samsonov, V.; Sano, S.; Sato, T.; Sawada, S.; Sedgwick, K.; Seele, J.; Seidl, R.; Seto, R.; Sharma, D.; Shein, I.; Shibata, T.-A.; Shigaki, K.; Shimomura, M.; Shoji, K.; Shukla, P.; Sickles, A.; Silva, C.; Silvermyr, D.; Silvestre, C.; Sim, K.; Singh, B.; Singh, C.; Singh, V.; Slunečka, M.; Soltz, R.; Sondheim, W.; Sorensen, S.; Sourikova, I.; Stankus, P.; Stenlund, E.; Stoll, S.; Sugitate, T.; Sukhanov, A.; Sziklai, J.; Takagui, E.; Taketani, A.; Tanabe, R.; Tanaka, Y.; Taneja, S.; Tanida, K.; Tannenbaum, M.; Tarafdar, S.; Taranenko, A.; Themann, H.; Thomas, D.; Thomas, T.; Togawa, M.; Toia, A.; Tomášek, L.; Torii, H.; Towell, R.; Tserruya, I.; Tsuchimoto, Y.; Vale, C.; Valle, H.; van Hecke, H.; Vazquez-Zambrano, E.; Veicht, A.; Velkovska, J.; Vértesi, R.; Virius, M.; Vrba, V.; Vznuzdaev, E.; Wang, X.; Watanabe, D.; Watanabe, K.; Watanabe, Y.; Wei, F.; Wei, R.; Wessels, J.; White, S.; Winter, D.; Woody, C.; Wright, R.; Wysocki, M.; Yamaguchi, Y.; Yamaura, K.; Yang, R.; Yanovich, A.; Ying, J.; Yokkaichi, S.; You, Z.; Young, G.; Younus, I.; Yushmanov, I.; Zajc, W.; Zhou, S.; Zolin, L.

Author(s)

Aidala, Christine A.

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Abstract

Back-to-back hadron pair yields in d+Au and p+p collisions at √sNN=200 GeV were measured with the PHENIX detector at the Relativistic Heavy Ion Collider. Rapidity separated hadron pairs were detected with the trigger hadron at pseudorapidity |η|<0.35 and the associated hadron at forward rapidity (deuteron direction, 3.0<η<3.8). Pairs were also detected with both hadrons measured at forward rapidity; in this case, the yield of back-to-back hadron pairs in d+Au collisions with small impact parameters is observed to be suppressed by a factor of 10 relative to p+p collisions. The kinematics of these pairs is expected to probe partons in the Au nucleus with a low fraction x of the nucleon momenta, where the gluon densities rise sharply. The observed suppression as a function of nuclear thickness, pT, and η points to cold nuclear matter effects arising at high parton densities.

Date issued

2011-10

URI

http://hdl.handle.net/1721.1/72110

Department

Massachusetts Institute of Technology. Laboratory for Nuclear Science

Journal

Physical Review Letters

Publisher

American Physical Society

Citation

Adare, A. et al. “Suppression of Back-to-Back Hadron Pairs at Forward Rapidity in d+Au Collisions at sqrt[s_{NN}]=200 GeV.” Physical Review Letters 107.17 (2011): 172301. © 2011 American Physical Society.

Version: Final published version

ISSN

0031-9007

1079-7114

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