APS » Phys. Rev. Lett. » Volume 101 » Issue 23

A. Adare,⁸ S. Afanasiev,²² C. Aidala,⁹ N. N. Ajitanand,⁴⁹ Y. Akiba,^43,44 H. Al-Bataineh,³⁸ J. Alexander,⁴⁹ A. Al-Jamel,³⁸ K. Aoki,^28,43 L. Aphecetche,⁵¹ R. Armendariz,³⁸ S. H. Aronson,³ J. Asai,⁴⁴ E. T. Atomssa,²⁹ R. Averbeck,⁵⁰ T. C. Awes,³⁹ B. Azmoun,³ V. Babintsev,¹⁸ G. Baksay,¹⁴ L. Baksay,¹⁴ A. Baldisseri,¹¹ K. N. Barish,⁴ P. D. Barnes,³¹ B. Bassalleck,³⁷ S. Bathe,⁴ S. Batsouli,^9,39 V. Baublis,⁴² F. Bauer,⁴ A. Bazilevsky,³ S. Belikov,^3,21 R. Bennett,⁵⁰ Y. Berdnikov,⁴⁶ A. A. Bickley,⁸ M. T. Bjorndal,⁹ J. G. Boissevain,³¹ H. Borel,¹¹ K. Boyle,⁵⁰ M. L. Brooks,³¹ D. S. Brown,³⁸ D. Bucher,³⁴ H. Buesching,³ V. Bumazhnov,¹⁸ G. Bunce,^3,44 J. M. Burward-Hoy,³¹ S. Butsyk,^31,50 S. Campbell,⁵⁰ J.-S. Chai,²³ B. S. Chang,⁵⁸ J.-L. Charvet,¹¹ S. Chernichenko,¹⁸ J. Chiba,²⁴ C. Y. Chi,⁹ M. Chiu,^9,19 I. J. Choi,⁵⁸ T. Chujo,⁵⁵ P. Chung,⁴⁹ A. Churyn,¹⁸ V. Cianciolo,³⁹ C. R. Cleven,¹⁶ Y. Cobigo,¹¹ B. A. Cole,⁹ M. P. Comets,⁴⁰ P. Constantin,^21,31 M. Csanád,¹³ T. Csörgő,²⁵ T. Dahms,⁵⁰ K. Das,¹⁵ G. David,³ M. B. Deaton,¹ K. Dehmelt,¹⁴ H. Delagrange,⁵¹ A. Denisov,¹⁸ D. d'Enterria,⁹ A. Deshpande,^44,50 E. J. Desmond,³ O. Dietzsch,⁴⁷ A. Dion,⁵⁰ M. Donadelli,⁴⁷ J. L. Drachenberg,¹ O. Drapier,²⁹ A. Drees,⁵⁰ A. K. Dubey,⁵⁷ A. Durum,¹⁸ V. Dzhordzhadze,^4,52 Y. V. Efremenko,³⁹ J. Egdemir,⁵⁰ F. Ellinghaus,⁸ W. S. Emam,⁴ A. Enokizono,^17,30 H. En'yo,^43,44 B. Espagnon,⁴⁰ S. Esumi,⁵⁴ K. O. Eyser,⁴ D. E. Fields,^37,44 M. Finger,^5,22 M. Finger, Jr.,^5,22 F. Fleuret,²⁹ S. L. Fokin,²⁷ B. Forestier,³² Z. Fraenkel,⁵⁷ J. E. Frantz,^9,50 A. Franz,³ A. D. Frawley,¹⁵ K. Fujiwara,⁴³ Y. Fukao,^28,43 S.-Y. Fung,⁴ T. Fusayasu,³⁶ S. Gadrat,³² I. Garishvili,⁵² F. Gastineau,⁵¹ M. Germain,⁵¹ A. Glenn,^8,52 H. Gong,⁵⁰ M. Gonin,²⁹ J. Gosset,¹¹ Y. Goto,^43,44 R. Granier de Cassagnac,²⁹ N. Grau,²¹ S. V. Greene,⁵⁵ M. Grosse Perdekamp,^19,44 T. Gunji,⁷ H.-Å. Gustafsson,³³ T. Hachiya,^17,43 A. Hadj Henni,⁵¹ C. Haegemann,³⁷ J. S. Haggerty,³ M. N. Hagiwara,¹ H. Hamagaki,⁷ R. Han,⁴¹ H. Harada,¹⁷ E. P. Hartouni,³⁰ K. Haruna,¹⁷ M. Harvey,³ E. Haslum,³³ K. Hasuko,⁴³ R. Hayano,⁷ M. Heffner,³⁰ T. K. Hemmick,⁵⁰ T. Hester,⁴ J. M. Heuser,⁴³ X. He,¹⁶ H. Hiejima,¹⁹ J. C. Hill,²¹ R. Hobbs,³⁷ M. Hohlmann,¹⁴ M. Holmes,⁵⁵ W. Holzmann,⁴⁹ K. Homma,¹⁷ B. Hong,²⁶ T. Horaguchi,^43,53 D. Hornback,⁵² M. G. Hur,²³ T. Ichihara,^43,44 K. Imai,^28,43 J. Imrek,¹² M. Inaba,⁵⁴ Y. Inoue,^45,43 D. Isenhower,¹ L. Isenhower,¹ M. Ishihara,⁴³ T. Isobe,⁷ M. Issah,⁴⁹ A. Isupov,²² B. V. Jacak,⁵⁰ J. Jia,⁹ J. Jin,⁹ O. Jinnouchi,⁴⁴ B. M. Johnson,³ K. S. Joo,³⁵ D. Jouan,⁴⁰ F. Kajihara,^7,43 S. Kametani,^7,56 N. Kamihara,^43,53 J. Kamin,⁵⁰ M. Kaneta,⁴⁴ J. H. Kang,⁵⁸ H. Kanou,^43,53 T. Kawagishi,⁵⁴ D. Kawall,⁴⁴ A. V. Kazantsev,²⁷ S. Kelly,⁸ A. Khanzadeev,⁴² J. Kikuchi,⁵⁶ D. H. Kim,³⁵ D. J. Kim,⁵⁸ E. Kim,⁴⁸ Y.-S. Kim,²³ E. Kinney,⁸ A. Kiss,¹³ E. Kistenev,³ A. Kiyomichi,⁴³ J. Klay,³⁰ C. Klein-Boesing,³⁴ L. Kochenda,⁴² V. Kochetkov,¹⁸ B. Komkov,⁴² M. Konno,⁵⁴ D. Kotchetkov,⁴ A. Kozlov,⁵⁷ A. Král,¹⁰ A. Kravitz,⁹ P. J. Kroon,³ J. Kubart,^5,20 G. J. Kunde,³¹ N. Kurihara,⁷ K. Kurita,^45,43 M. J. Kweon,²⁶ Y. Kwon,^52,58 G. S. Kyle,³⁸ R. Lacey,⁴⁹ Y.-S. Lai,⁹ J. G. Lajoie,²¹ A. Lebedev,²¹ Y. Le Bornec,⁴⁰ S. Leckey,⁵⁰ D. M. Lee,³¹ M. K. Lee,⁵⁸ T. Lee,⁴⁸ M. J. Leitch,³¹ M. A. L. Leite,⁴⁷ B. Lenzi,⁴⁷ H. Lim,⁴⁸ T. Liška,¹⁰ A. Litvinenko,²² M. X. Liu,³¹ X. Li,⁶ X. H. Li,⁴ B. Love,⁵⁵ D. Lynch,³ C. F. Maguire,⁵⁵ Y. I. Makdisi,³ A. Malakhov,²² M. D. Malik,³⁷ V. I. Manko,²⁷ Y. Mao,^41,43 L. Mašek,^5,20 H. Masui,⁵⁴ F. Matathias,^9,50 M. C. McCain,¹⁹ M. McCumber,⁵⁰ P. L. McGaughey,³¹ Y. Miake,⁵⁴ P. Mikeš,^5,20 K. Miki,⁵⁴ T. E. Miller,⁵⁵ A. Milov,⁵⁰ S. Mioduszewski,³ G. C. Mishra,¹⁶ M. Mishra,² J. T. Mitchell,³ M. Mitrovski,⁴⁹ A. Morreale,⁴ D. P. Morrison,³ J. M. Moss,³¹ T. V. Moukhanova,²⁷ D. Mukhopadhyay,⁵⁵ J. Murata,^45,43 S. Nagamiya,²⁴ Y. Nagata,⁵⁴ J. L. Nagle,⁸ M. Naglis,⁵⁷ I. Nakagawa,^43,44 Y. Nakamiya,¹⁷ T. Nakamura,¹⁷ K. Nakano,^43,53 J. Newby,³⁰ M. Nguyen,⁵⁰ B. E. Norman,³¹ A. S. Nyanin,²⁷ J. Nystrand,³³ E. O'Brien,³ S. X. Oda,⁷ C. A. Ogilvie,²¹ H. Ohnishi,⁴³ I. D. Ojha,⁵⁵ H. Okada,^28,43 K. Okada,⁴⁴ M. Oka,⁵⁴ O. O. Omiwade,¹ A. Oskarsson,³³ I. Otterlund,³³ M. Ouchida,¹⁷ K. Ozawa,⁷ R. Pak,³ D. Pal,⁵⁵ A. P. T. Palounek,³¹ V. Pantuev,⁵⁰ V. Papavassiliou,³⁸ J. Park,⁴⁸ W. J. Park,²⁶ S. F. Pate,³⁸ H. Pei,²¹ J.-C. Peng,¹⁹ H. Pereira,¹¹ V. Peresedov,²² D. Yu. Peressounko,²⁷ C. Pinkenburg,³ R. P. Pisani,³ M. L. Purschke,³ A. K. Purwar,^31,50 H. Qu,¹⁶ J. Rak,^21,37 A. Rakotozafindrabe,²⁹ I. Ravinovich,⁵⁷ K. F. Read,^39,52 S. Rembeczki,¹⁴ M. Reuter,⁵⁰ K. Reygers,³⁴ V. Riabov,⁴² Y. Riabov,⁴² G. Roche,³² A. Romana,²⁹ M. Rosati,²¹ S. S. E. Rosendahl,³³ P. Rosnet,³² P. Rukoyatkin,²² V. L. Rykov,⁴³ S. S. Ryu,⁵⁸ B. Sahlmueller,³⁴ N. Saito,^28,43,44 T. Sakaguchi,^3,7,56 S. Sakai,⁵⁴ H. Sakata,¹⁷ V. Samsonov,⁴² H. D. Sato,^28,43 S. Sato,^3,24,54 S. Sawada,²⁴ J. Seele,⁸ R. Seidl,¹⁹ V. Semenov,¹⁸ R. Seto,⁴ D. Sharma,⁵⁷ T. K. Shea,³ I. Shein,¹⁸ A. Shevel,^42,49 T.-A. Shibata,^43,53 K. Shigaki,¹⁷ M. Shimomura,⁵⁴ T. Shohjoh,⁵⁴ K. Shoji,^28,43 A. Sickles,⁵⁰ C. L. Silva,⁴⁷ D. Silvermyr,³⁹ C. Silvestre,¹¹ K. S. Sim,²⁶ C. P. Singh,² V. Singh,² S. Skutnik,²¹ M. Slunečka,^5,22 W. C. Smith,¹ A. Soldatov,¹⁸ R. A. Soltz,³⁰ W. E. Sondheim,³¹ S. P. Sorensen,⁵² I. V. Sourikova,³ F. Staley,¹¹ P. W. Stankus,³⁹ E. Stenlund,³³ M. Stepanov,³⁸ A. Ster,²⁵ S. P. Stoll,³ T. Sugitate,¹⁷ C. Suire,⁴⁰ J. P. Sullivan,³¹ J. Sziklai,²⁵ T. Tabaru,⁴⁴ S. Takagi,⁵⁴ E. M. Takagui,⁴⁷ A. Taketani,^43,44 K. H. Tanaka,²⁴ Y. Tanaka,³⁶ K. Tanida,^43,44 M. J. Tannenbaum,³ A. Taranenko,⁴⁹ P. Tarján,¹² T. L. Thomas,³⁷ M. Togawa,^28,43 A. Toia,⁵⁰ J. Tojo,⁴³ L. Tomášek,²⁰ H. Torii,⁴³ R. S. Towell,¹ V-N. Tram,²⁹ I. Tserruya,⁵⁷ Y. Tsuchimoto,^17,43 S. K. Tuli,² H. Tydesjö,³³ N. Tyurin,¹⁸ C. Vale,²¹ H. Valle,⁵⁵ H. W. van Hecke,³¹ J. Velkovska,⁵⁵ R. Vertesi,¹² A. A. Vinogradov,²⁷ M. Virius,¹⁰ V. Vrba,²⁰ E. Vznuzdaev,⁴² M. Wagner,^28,43 D. Walker,⁵⁰ X. R. Wang,³⁸ Y. Watanabe,^43,44 J. Wessels,³⁴ S. N. White,³ N. Willis,⁴⁰ D. Winter,⁹ C. L. Woody,³ M. Wysocki,⁸ W. Xie,^4,44 Y. L. Yamaguchi,⁵⁶ A. Yanovich,¹⁸ Z. Yasin,⁴ J. Ying,¹⁶ S. Yokkaichi,^43,44 G. R. Young,³⁹ I. Younus,³⁷ I. E. Yushmanov,²⁷ W. A. Zajc,⁹ O. Zaudtke,³⁴ C. Zhang,^9,39 S. Zhou,⁶ J. Zimányi,²⁵ and L. Zolin²²

(PHENIX Collaboration)

¹Abilene Christian University, Abilene, Texas 79699, USA
²Department of Physics, Banaras Hindu University, Varanasi 221005, India
³Brookhaven National Laboratory, Upton, New York 11973-5000, USA
⁴University of California-Riverside, Riverside, California 92521, USA
⁵Charles University, Ovocný trh 5, Praha 1, 116 36, Prague, Czech Republic
⁶China Institute of Atomic Energy (CIAE), Beijing, People's Republic of China
⁷Center for Nuclear Study, Graduate School of Science, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
⁸University of Colorado, Boulder, Colorado 80309, USA
⁹Columbia University, New York, New York 10027 and Nevis Laboratories, Irvington, New York 10533, USA
¹⁰Czech Technical University, Zikova 4, 166 36 Prague 6, Czech Republic
¹¹Dapnia, CEA Saclay, F-91191, Gif-sur-Yvette, France
¹²Debrecen University, H-4010 Debrecen, Egyetem tér 1, Hungary
¹³ELTE, Eötvös Loránd University, H-1117 Budapest, Pázmány P. s. 1/A, Hungary
¹⁴Florida Institute of Technology, Melbourne, Florida 32901, USA
¹⁵Florida State University, Tallahassee, Florida 32306, USA
¹⁶Georgia State University, Atlanta, Georgia 30303, USA
¹⁷Hiroshima University, Kagamiyama, Higashi-Hiroshima 739-8526, Japan
¹⁸IHEP Protvino, State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, 142281, Russia
¹⁹University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA
²⁰Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, 182 21 Prague 8, Czech Republic
²¹Iowa State University, Ames, Iowa 50011, USA
²²Joint Institute for Nuclear Research, 141980 Dubna, Moscow Region, Russia
²³KAERI, Cyclotron Application Laboratory, Seoul, Korea
²⁴KEK, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, Japan
²⁵KFKI Research Institute for Particle and Nuclear Physics of the Hungarian Academy of Sciences (MTA KFKI RMKI), H-1525 Budapest 114, POBox 49, Budapest, Hungary
²⁶Korea University, Seoul, 136-701, Korea
²⁷Russian Research Center “Kurchatov Institute”, Moscow, Russia
²⁸Kyoto University, Kyoto 606-8502, Japan
²⁹Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS-IN2P3, Route de Saclay, F-91128, Palaiseau, France
³⁰Lawrence Livermore National Laboratory, Livermore, California 94550, USA
³¹Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
³²LPC, Université Blaise Pascal, CNRS-IN2P3, Clermont-Fd, 63177 Aubiere Cedex, France
³³Department of Physics, Lund University, Box 118, SE-221 00 Lund, Sweden
³⁴Institut für Kernphysik, University of Muenster, D-48149 Muenster, Germany
³⁵Myongji University, Yongin, Kyonggido 449-728, Korea
³⁶Nagasaki Institute of Applied Science, Nagasaki-shi, Nagasaki 851-0193, Japan
³⁷University of New Mexico, Albuquerque, New Mexico 87131, USA
³⁸New Mexico State University, Las Cruces, New Mexico 88003, USA
³⁹Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
⁴⁰IPN-Orsay, Universite Paris Sud, CNRS-IN2P3, BP1, F-91406, Orsay, France
⁴¹Peking University, Beijing, People's Republic of China
⁴²PNPI, Petersburg Nuclear Physics Institute, Gatchina, Leningrad region, 188300, Russia
⁴³RIKEN, The Institute of Physical and Chemical Research, Wako, Saitama 351-0198, Japan
⁴⁴RIKEN BNL Research Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
⁴⁵Physics Department, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 171-8501, Japan
⁴⁶Saint Petersburg State Polytechnic University, St. Petersburg, Russia
⁴⁷Universidade de São Paulo, Instituto de Física, Caixa Postal 66318, São Paulo CEP05315-970, Brazil
⁴⁸System Electronics Laboratory, Seoul National University, Seoul, Korea
⁴⁹Chemistry Department, Stony Brook University, SUNY, Stony Brook, New York 11794-3400, USA
⁵⁰Department of Physics and Astronomy, Stony Brook University, SUNY, Stony Brook, New York 11794, USA
⁵¹SUBATECH (Ecole des Mines de Nantes, CNRS-IN2P3, Université de Nantes) BP 20722-44307, Nantes, France
⁵²University of Tennessee, Knoxville, Tennessee 37996, USA
⁵³Department of Physics, Tokyo Institute of Technology, Oh-okayama, Meguro, Tokyo 152-8551, Japan
⁵⁴Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305, Japan
⁵⁵Vanderbilt University, Nashville, Tennessee 37235, USA
⁵⁶Waseda University, Advanced Research Institute for Science and Engineering, 17 Kikui-cho, Shinjuku-ku, Tokyo 162-0044, Japan
⁵⁷Weizmann Institute, Rehovot 76100, Israel
⁵⁸Yonsei University, IPAP, Seoul 120-749, Korea

For Au+Au collisions at 200 GeV, we measure neutral pion production with good statistics for transverse momentum, p_T, up to 20 GeV/c. A fivefold suppression is found, which is essentially constant for 5<p_T<20 GeV/c. Experimental uncertainties are small enough to constrain any model-dependent parametrization for the transport coefficient of the medium, e.g., q^ in the parton quenching model. The spectral shape is similar for all collision classes, and the suppression does not saturate in Au+Au collisions.

©2008 The American Physical Society

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