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High transverse momentum eta meson production in p+p, d+Au, and Au+Au collisions at root s(NN)=200 GeV

Adler, S. S.; Afanasiev, S.; Aidala, C.; Ajitanand, N. N.; Akiba, Y.; Alexander, J.; Al-Jamel, A.; Amirikas, R.; Aoki, K. and Aphecetche, L., et al. (2007) In Physical Review C (Nuclear Physics) 75(2).
Abstract
Inclusive transverse momentum spectra of eta mesons in the range p(T)approximate to 2-12 GeV/c have been measured at midrapidity (vertical bar eta vertical bar < 0.35) by the PHENIX experiment at RHIC in p+p,d+Au, and Au+Au collisions at root s(NN)=200 GeV. The eta mesons are reconstructed through their eta ->gamma gamma channel for the three colliding systems as well as through the eta ->pi(0)pi(+)pi(-) decay mode in p+p and d+Au collisions. The nuclear modification factor in d+Au collisions, R-dAu(p(T))approximate to 1.0-1.1, suggests at most only modest p(T) broadening ("Cronin enhancement"). In central Au+Au reactions, the eta yields are significantly suppressed, with R-AuAu(p(T))approximate to 0.2. The ratio of eta to pi(0)... (More)
Inclusive transverse momentum spectra of eta mesons in the range p(T)approximate to 2-12 GeV/c have been measured at midrapidity (vertical bar eta vertical bar < 0.35) by the PHENIX experiment at RHIC in p+p,d+Au, and Au+Au collisions at root s(NN)=200 GeV. The eta mesons are reconstructed through their eta ->gamma gamma channel for the three colliding systems as well as through the eta ->pi(0)pi(+)pi(-) decay mode in p+p and d+Au collisions. The nuclear modification factor in d+Au collisions, R-dAu(p(T))approximate to 1.0-1.1, suggests at most only modest p(T) broadening ("Cronin enhancement"). In central Au+Au reactions, the eta yields are significantly suppressed, with R-AuAu(p(T))approximate to 0.2. The ratio of eta to pi(0) yields is approximately constant as a function of p(T) for the three colliding systems in agreement with the high-p(T) world average of R-eta/pi(0)approximate to 0.5 in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions for a wide range of center-of-mass energies (root sNN approximate to 3-1800 GeV) as well as, for high scaled momentum x(p), in e(+)e(-) annihilations at root s=91.2 GeV. These results are consistent with a scenario where high-p(T) eta production in nuclear collisions at the Relativistic Heavy Ion Collider is largely unaffected by initial-state effects but where light-quark mesons (pi(0),eta) are equally suppressed due to final-state interactions of the parent partons in the dense medium produced in Au+Au reactions. (Less)
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Physical Review C (Nuclear Physics)
volume
75
issue
2
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American Physical Society
external identifiers
  • wos:000244534400045
  • scopus:33847405312
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0556-2813
DOI
10.1103/PhysRevC.75.024909
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English
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2007-12-11 10:56:36
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@article{7bee83f4-07cc-4ec2-b78b-0645dba81bb5,
  abstract     = {Inclusive transverse momentum spectra of eta mesons in the range p(T)approximate to 2-12 GeV/c have been measured at midrapidity (vertical bar eta vertical bar &lt; 0.35) by the PHENIX experiment at RHIC in p+p,d+Au, and Au+Au collisions at root s(NN)=200 GeV. The eta mesons are reconstructed through their eta -&gt;gamma gamma channel for the three colliding systems as well as through the eta -&gt;pi(0)pi(+)pi(-) decay mode in p+p and d+Au collisions. The nuclear modification factor in d+Au collisions, R-dAu(p(T))approximate to 1.0-1.1, suggests at most only modest p(T) broadening ("Cronin enhancement"). In central Au+Au reactions, the eta yields are significantly suppressed, with R-AuAu(p(T))approximate to 0.2. The ratio of eta to pi(0) yields is approximately constant as a function of p(T) for the three colliding systems in agreement with the high-p(T) world average of R-eta/pi(0)approximate to 0.5 in hadron-hadron, hadron-nucleus, and nucleus-nucleus collisions for a wide range of center-of-mass energies (root sNN approximate to 3-1800 GeV) as well as, for high scaled momentum x(p), in e(+)e(-) annihilations at root s=91.2 GeV. These results are consistent with a scenario where high-p(T) eta production in nuclear collisions at the Relativistic Heavy Ion Collider is largely unaffected by initial-state effects but where light-quark mesons (pi(0),eta) are equally suppressed due to final-state interactions of the parent partons in the dense medium produced in Au+Au reactions.},
  articleno    = {024909},
  author       = {Adler, S. S. and Afanasiev, S. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Alexander, J. and Al-Jamel, A. and Amirikas, R. and Aoki, K. and Aphecetche, L. and Armendariz, R. and Aronson, S. H. and Averbeck, R. and Awes, T. C. and Azmoun, R. and Babintsev, V. and Baldisseri, A. and Barish, K. N. and Barnes, P. D. and Bassalleck, B. and Bathe, S. and Batsouli, S. and Baublis, V. and Bauer, F. and Bazilevsky, A. and Belikov, S. and Berdnikov, Y. and Bhagavatula, S. and Bjorndal, M. T. and Boissevain, J. G. and Borel, H. and Borenstein, S. and Brooks, M. L. and Brown, D. S. and Bruner, N. and Bucher, D. and Buesching, H. and Bumazhnov, V. and Bunce, G. and Burward-Hoy, J. M. and Butsyk, S. and Camard, X. and Chai, J. -S. and Chand, P. and Chang, W. C. and Chernichenko, S. and Chiba, J. and Chi, C. Y. and Chiu, M. and Choi, I. J. and Choi, J. and Choudhury, R. K. and Chujo, T. and Cianciolo, V. and Cobigo, Y. and Cole, B. A. and Comets, M. P. and Constantin, P. and Csanad, M. and Csorgo, T. and Cussonneau, J. P. and Das, K. and David, G. and Deak, F. and Delagrange, H. and Denisov, A. and d'Enterria, D. and Deshpande, A. and Desmond, E. J. and Devismes, A. and Dietzsch, O. and Drachenberg, J. L. and Drapier, O. and Drees, A. and Drees, K. A. and du Rietz, Rickard and Durum, A. and Dutta, D. and Dzhordzhadze, V. and Efremenko, Y. V. and El Chenawi, K. and Enokizono, A. and En'yo, H. and Espagnon, B. and Esumi, S. and Ewell, L. and Fields, D. E. and Finck, C. and Fleuret, F. and Fokin, S. L. and Fox, B. D. and Fraenkel, Z. and Frantz, J. E. and Franz, A. and Frawley, A. D. and Fukao, Y. and Fung, S. -Y. and Gadrat, S. and Garpman, Sten and Germain, M. and Ghosh, T. K. and Glenn, A. and Gogiberidze, G. and Gonin, M. and Gosset, J. and Goto, Y. and Granier de Cassagnac, R. and Grau, N. and Greene, S. V. and Grosse Perdekamp, M. and Guryn, W. and Gustafsson, Hans-Åke and Hachiya, T. and Haggerty, J. S. and Hamagaki, H. and Hansen, A. G. and Hartouni, E. P. and Harvey, M. and Hasuko, K. and Hayano, R. and Hayashi, N. and Heffner, M. and Hemmick, T. K. and Heuser, J. M. and He, X. and Hibino, M. and Hidas, P. and Hiejima, H. and Hill, J. C. and Hobbs, R. and Holzmann, W. and Homma, K. and Hong, B. and Hoover, A. and Horaguchi, T. and Ichihara, T. and Ikonnikov, V. V. and Imai, K. and Inaba, M. and Inuzuka, M. and Isenhower, D. and Isenhower, L. and Ishihara, M. and Issah, M. and Isupov, A. and Jacak, B. V. and Jang, W. Y. and Jeong, Y. and Jia, J. and Jinnouchi, O. and Johnson, B. M. and Johnson, S. C. and Joo, K. S. and Jouan, D. and Kajihara, F. and Kametani, S. and Kamihara, N. and Kaneta, M. and Kang, J. H. and Kapoor, S. S. and Katou, K. and Kaufman, M. and Kawabata, T. and Kazantsev, A. V. and Kelly, S. and Khachaturov, B. and Khanzadeev, A. and Kikuchi, J. and Kim, D. H. and Kim, D. J. and Kim, D. W. and Kim, E. and Kim, G. -B. and Kim, H. J. and Kinney, E. and Kiss, A. and Kistenev, E. and Kiyomichi, A. and Kiyoyama, K. and Klein-Boesing, C. and Kobayashi, H. and Kochenda, L. and Kochetkov, V. and Koehler, D. and Kohama, T. and Kohara, R. and Komkov, B. and Konno, M. and Kopytine, M. and Kotchetkov, D. and Kozlov, A. and Kroon, P. J. and Kuberg, C. H. and Kunde, G. J. and Kurita, K. and Kuroki, Y. and Kweon, M. J. and Kwon, Y. and Kyle, G. S. and Lacey, R. and Ladygin, V. and Lajoie, J. G. and Lebedev, A. and Le Bornec, Y. and Leckey, S. and Lee, D. M. and Lee, S. and Leitch, M. J. and Leite, M. A. L. and Lim, H. and Litvinenko, A. and Liu, M. X. and Liu, Y. and Li, X. H. and Maguire, C. F. and Makdisi, Y. I. and Malakhov, A. and Manko, V. I. and Mao, Y. and Martinez, G. and Marx, M. D. and Masui, H. and Matathias, F. and Matsumoto, T. and McCain, M. C. and McGaughey, P. L. and Melnikov, E. and Messer, F. and Miake, Y. and Milan, J. and Miller, T. E. and Milov, A. and Mioduszewski, S. and Mischke, R. E. and Mishra, G. C. and Mitchell, J. T. and Mohanty, A. K. and Morrison, D. P. and Moss, J. M. and Muhlbacher, F. and Mukhopadhyay, D. and Muniruzzaman, M. and Murata, J. and Nagamiya, S. and Nagle, J. L. and Nakamura, T. and Nandi, B. K. and Nara, M. and Newby, J. and Nilsson, Pål and Nyanin, A. S. and Nystrand, Joakim and O'Brien, E. and Ogilvie, C. A. and Ohnishi, H. and Ojha, I. D. and Okada, H. and Okada, K. and Ono, M. and Onuchin, V. and Oskarsson, Anders and Otterlund, Ingvar and Oyama, K. and Ozawa, K. and Pal, D. and Palounek, A. P. T. and Pantuev, V. and Papavassiliou, V. and Park, J. and Park, W. J. and Parmar, A. and Pate, S. F. and Pei, H. and Peitzmann, T. and Penev, V. and Peng, J. -C. and Pereira, H. and Peresedov, V. and Pierson, A. and Pinkenburg, C. and Pisani, R. P. and Plasil, F. and Purschke, M. L. and Purwar, A. K. and Qualls, J. M. and Rak, J. and Ravinovich, I. and Read, K. F. and Reuter, M. and Reygers, K. and Riabov, V. and Riabov, Y. and Roche, G. and Romana, A. and Rosati, M. and Rosendahl, Sarah and Rosnet, P. and Rykov, V. L. and Ryu, S. S. and Sadler, M. E. and Sahlmueller, B. and Saito, N. and Sakaguchi, T. and Sakai, M. and Sakai, S. and Samsonov, V. and Sanfratello, L. and Santo, R. and Sato, H. D. and Sato, S. and Sawada, S. and Schutz, Y. and Semenov, V. and Seto, R. and Shaw, M. R. and Shea, T. K. and Shein, I. and Shibata, T. -A. and Shigaki, K. and Shiina, T. and Shimomura, M. and Sickles, A. and Silva, C. L. and Silvermyr, David and Sim, K. S. and Singh, C. P. and Singh, V. and Sivertz, M. and Soldatov, A. and Soltz, R. A. and Sondheim, W. E. and Sorensen, S. P. and Sourikova, I. V. and Staley, F. and Stankus, P. W. and Stenlund, Evert and Stepanov, M. and Ster, A. and Stoll, S. P. and Sugitate, T. and Sullivan, J. P. and Takagi, S. and Takagui, E. M. and Taketani, A. and Tamai, M. and Tanaka, K. H. and Tanaka, Y. and Tanida, K. and Tannenbaum, M. J. and Taranenko, A. and Tarjan, P. and Tepe, J. D. and Thomas, T. L. and Togawa, M. and Tojo, J. and Torii, H. and Towell, R. S. and Tram, V. -N. and Tserruya, I. and Tsuchimoto, Y. and Tsuruoka, H. and Tuli, S. K. and Tydesjö, Henrik and Tyurin, N. and Uam, T. J. and van Hecke, H. W. and Velkovska, J. and Velkovsky, M. and Veszpremi, V. and Villatte, L. and Vinogradov, A. A. and Volkov, M. A. and Vznuzdaev, E. and Wang, X. R. and Watanabe, Y. and White, S. N. and Willis, N. and Wohn, F. K. and Woody, C. L. and Xie, W. and Yang, Y. and Yanovich, A. and Yokkaichi, S. and Young, G. R. and Yushmanov, I. E. and Zajc, W. A. and Zhang, C. and Zhou, S. and Zhou, S. J. and Zimanyi, J. and Zolin, L. and Zong, X.},
  issn         = {0556-2813},
  language     = {eng},
  number       = {2},
  publisher    = {American Physical Society},
  series       = {Physical Review C (Nuclear Physics)},
  title        = {High transverse momentum eta meson production in p+p, d+Au, and Au+Au collisions at root s(NN)=200 GeV},
  url          = {http://dx.doi.org/10.1103/PhysRevC.75.024909},
  volume       = {75},
  year         = {2007},
}