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High-pT charged hadron suppression in Au+Au collisions at sNN=200GeV

Physical review C 2004年第3期69卷 034910-034910页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Manko Y. Ma Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) Boîte Postale 20722-44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo Instituto d

The PHENIX experiment at the relativistic Heavy Ion Collider has measured charged hadron yields at midrapidity over a wide range of transverse momenta (0.5<pT<10GeV∕c) in Au+Au collisions at sNN=200GeV. The dat...

The PHENIX experiment at the relativistic Heavy Ion Collider has measured charged hadron yields at midrapidity over a wide range of transverse momenta (0.5data are compared to π0 measurements from the same experiment. For both charged hadrons and neutral pions, the yields per nucleon-nucleon collision are significantly suppressed in central compared to peripheral and nucleon-nucleon collisions. The suppression sets in gradually and increases with increasing centrality of the collisions. Above 4–5GeV∕c in pT, a constant and almost identical suppression of charged hadrons and π0’s is observed. The pT spectra are compared to published spectra from Au+Au at sNN=130 in terms of xT scaling. Central and peripheral π0 as well as peripheral charged spectra exhibit the same xT scaling as observed in p+p data.

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J∕ψ production in Au-Au collisions at sNN=200GeV

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Physical review C 2004年第1期69卷 014901-014901页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J. -S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S. -Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai L. d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Manko Y Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) Boîte Postale 20722-44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay Bâtiment 703 F-91191 Gif-sur-Yvette France University of California-Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São

First results on charm quarkonia production in heavy ion collisions at the relativistic Heavy Ion Collider (rHIC) are presented. The yield of J∕ψ’s measured in the PHENIX experiment via electron-positron decay pairs at midrapidity for Au-Au reactions at sNN=200GeV is analyzed as a function of collision centrality. For this analysis we have studied 49.3×106 minimum bias Au-Au reactions. We present the J∕ψ invariant yield dN∕dy for peripheral and midcentral reactions. For the most central collisions where we observe no signal above background, we quote 90% confidence level upper limits. We compare these results with our J∕ψ measurement from proton-proton reactions at the same energy. We find that our measurements are not consistent with models that predict strong enhancement relative to binary collision scaling.

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Identified charged particle spectra and yields in Au+Au collisions at sNN=200GeV

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Physical review C 2004年第3期69卷 034909-034909页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En‘yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Manko Y. Ma Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722 44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California—Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo Instituto de Físi

The centrality dependence of transverse momentum distributions and yields for π±,K±,p, and p¯ in Au+Au collisions at sNN=200GeV at midrapidity are measured by the PHENIX experiment at the relativistic Heavy Ion Collider. We observe a clear particle mass dependence of the shapes of transverse momentum spectra in central collisions below ∼2GeV∕c in pT. Both mean transverse momenta and particle yields per participant pair increase from peripheral to midcentral and saturate at the most central collisions for all particle species. We also measure particle ratios of π−∕π+, K−∕K+, p¯∕p, K∕π, p∕π, and p¯∕π as a function of pT and collision centrality. The ratios of equal mass particle yields are independent of pT and centrality within the experimental uncertainties. In central collisions at intermediate transverse momenta ∼1.5–4.5GeV∕c, proton and antiproton yields constitute a significant fraction of the charged hadron production and show a scaling behavior different from that of pions.

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Improvement of NBTI and Electrical Characteristics by Ozone Pre-treatment and PBTI issues in HfAIO(N) High-k Gate dielectrics

Improvement of NBTI and Electrical Characteristics by Ozone ...

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IEEE International Electron devices Meeting

作者： doh, Seok Joo Jung, Hyung-Suk Kim, Yun-Seok Lim, Ha-Jin Kim, Jong Pyo Lee, Jung Hyoung Lee, Jong-Ho Lee, Nae-In Kang, Ho-Kyu Suh, Kwang-Pyuk Park, Seong Geon Kang, Sang Bom Choi, Gil Heyun Chung, Young-Su Baik, Hion-Suck Chang, Hyo-Sik Cho, Mann-Ho Moon, dae-Won Park, Hong Bae Cho, Moonju Hwang, Cheol Seong Advanced Process Development Project System LSI Business Samsung Electronics Co. Ltd. San #24 Nongseo-Ri Kiheung-Eup Yongin-City Kyunggi-Do 449-711 Korea Republic of Process Development Team 2 Semiconductor R and D Center Samsung Electronics Co. Ltd. AE Center Samsung Adv. Institute of Technology Nano Surface group Korea Res. Inst. of Std. and Science Sch. of Mat. Science and Engineering Seoul National University Seoul 151-742 Korea Republic of

For the first time, we have investigated the effect of ozone (O 3) pre-treatment on the Bias Temperature Instability (BTI) characteristics of high-k gate dielectrics. We found mat O3 pre-treatment improved NBTI and electrical characteristics of HfAlON gate dielectric. We suggest that O3 pre-treatment effectively suppress the incorporation of the impurities (such as nitrogen (N), hydrogen (H) and water related species), resulting in the improvement of NBTI characteristics (-2.32V operating voltage for 10 years lifetime). For the PBTI characteristics, the high-k gate dielectric with poly-Si gate electrode was severely degraded We suggest that dopants (such as arsenic (As) and phosphorus (P)) in the gate electrode of nMOSFETs diffuse into the gate dielectrics, causing the severe degradation of PBTI characteristics (∼1.1V operating voltage for 10 years lifetime). We believe that the optimization in the high-k gate stack can improve the PBTI characteristics by suppressing the dopants incorporation.

关键词： Hafnium compounds

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Improvement of NBTI and electrical characteristics by ozone pre-treatment and PBTI issues in HfAlO(N) high-k gate dielectrics

Improvement of NBTI and electrical characteristics by ozone ...

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International Electron devices Meeting (IEdM)

作者： Seok Joo doh Hyung-Suk Jung Yun-Seok Kim Ha-Jin Lim Jong Pyo Kim Jung Hyoung Lee Jong-Ho Lee Nae-In Lee Ho-Kyu Kan Kwang-Pyuk Suh Seong Geon Park Sang Bom Kang Gil Heyun Choi Young-Su Chung Hion-Suck Baikz Hdyo-Sik Chang Mann-Ho Cho dae-Won Moon Hong Bae Park Moonju Cho Cheol Seong Hwang Advanced Process Development Project System LSI Business Samsung Electronics Co. Ltd Yongin Kyunggi-Do Korea Process Development Team 2 Semiconductor R & D Center Samsung Electronics Co. Ltd South Korea AE Center Samsung Advanced Institute of Technology South Korea AE Center Samsung Advanced Institute of Technology Nano Surface group Korea Research Institute of Standard and Science South Korea Nano Surface group Korea Research Institute of Standard and Science School of Materials Science and Engineering Seoul National University Seoul Korea

ISBN: (纸本)0780378725

For the first time, we have investigated the effect of ozone (O/sub 3/) pre-treatment on the bias temperature instability (BTI) characteristics of high-k gate dielectrics. We found that O/sub 3/ pre-treatment improved NBTI and the electrical characteristics of HfAlON gate dielectric. We suggest that O/sub 3/ pre-treatment effectively suppresses the incorporation of the impurities (such as nitrogen (N), hydrogen (H) and water related species), resulting in the improvement of NBTI characteristics (-2.32 V operating voltage for 10 years lifetime). For the PBTI characteristics, the high-k gate dielectric with poly-Si gate electrode was severely degraded. We suggest that dopants (such as arsenic (As) and phosphorus (P)) in the gate electrode of nMOSFETs diffuse into the gate dielectrics, causing the severe degradation of PBTI characteristics (/spl sim/1.1 V operating voltage for 10 years lifetime). We believe that the optimization in the high-k gate stack can improve the PBTI characteristics by suppressing the dopants incorporation.

关键词： Niobium compounds Titanium compounds Electric variables dielectrics Voltage Electrodes degradation Temperature Impurities Nitrogen

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40th EASd Annual Meeting of the European Association for the Study of diabetes : Munich, Germany, 5-9 September 2004

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diabetologia 2004年第SUPPL 1期47卷 A1-A464页

作者： Veitenhansl, M. Stegner, K. Hierl, F.-X. dieterle, C. Feldmeier, H. Gutt, B. Landgraf, r. Garrow, A. P. Vileikyte, L. Findlow, A. Waterman, C. Boulton, A. J. M. Shankhdhar, K. Shankhdhar, L. Shankhdhar, U. Petrova, N. L. Foster, A. V. M. Edmonds, M. E. Ferraresi, r. Caravaggi, C. de Giglio, r. Cavaiani, P. Pogliaghi, I. Sommariva, E. Katz, I. A. Harlan, A. Miranda-Palma, B. Prieto-Sanchez, L. Armstrong, d. G. Bowker, J. H. Mizel, M. S. Cernea, S. Wohlgelernter, J. Kidron, M. Modi, P. raz, I. Arbit, E. Nosek, L. Kapitza, C. Beckett, P. Gelfand, r. Goldberg, M. Heise, T. Testa, M. A. Turner, r. r. Hayes, J. F. Scranton, r. E. Simonson, d. C. Yang, Y.-W. Hsu, Y.-J. Naujok, O. Francini, F. Jörns, A. Tiedge, M. Lenzen, S. Abdel-Wahab, Y. H. A. Marenah, L. Orr, d. F. Shaw, C. Flatt, P. r. Chokkalingam, K. Mansell, P. I. Clausen, P. Ekbom, P. damm, P. Feldt-rasmussen, U. Nielsen, B. Mathiesen, E. r. Feldt-rasmussen, B. dewan, S. da Silva, N. Ternan, P. Mc Leong, K. S. Wilding, J. P. H. Asatiani, N. Kurashvili, r. dundua, M. Shelestova, E. Pagava, K. ramazashvili, M. Hod, M. Smirnov, S. Petersen, J. L. A. Justesen, T. I. ringholm Nielsen, L. Müller, C. Højlund, K. Wensaas, A. Kase, E. T. Aas, V. rustan, A. C. Thoresen, G. H. Levin, K. Beck-Nielsen, H. Gaster, M. Im, S.-S. Kang, S.-Y. Kim, S.-Y. Ahn, Y.-H. Lihn, A. S. Schmoll, d. Werner, T. Kienitz, A. Meyer, M. Barthel, A. Ailett, F. Sutherland, C. Walther, r. Grempler, r. Sasson, S. reich, r. Tenenbaum, T. Alpert, E. Anfossi, G. russo, I. Traversa, M. Massucco, P. Mattiello, L. doronzo, G. Trovati, M. Lally, S. Tan, C. Y. Owens, d. Tomkin, G. H. Porchay, I. Péan, F. Bellili, N. Betoulle, d. Balkau, B. Tichet, J. Marre, M. Fumeron, F. Chatellier, G. Alhenc-Gelas, F. Nichols, G. A. Brown, J. B. Hayes, r. P. Bowman, L. drexel, H. Saely, C. H. Marte, T. Benzer, W. Langer, P. Hoefle, G. Moll, W. Aczel, S. Karagiannis, E. Lübben, G. Urquhart, r. Edwards, G. Bruce, S. Howlett, H. S. C. Cugnardey, N. Turner, K. C. Park, J.-S. Fiedorek, F. T. Avogaro, A. Gallo, A. Pinton, P. riz Innenstadt Klinikum der Universität München München Germany Diabetes Center Medizinische Klinik München Germany Medicine The University of Manchester Manchester UK Medicine University of Manchester Manchester UK Podiatry The University of Salford Manchester UK Department of Medicine/Division of Endocrinology Diabetes and Metabolism University of Miami Miami USA Department of Medicine Manchester Royal Infirmary Manchester UK Podiatry L.K.Diabetes Centre Lucknow India Diabetology L.K.Diabetes Centre Lucknow India Medical Nutrition L.K.Diabetes Centre Lucknow India Diabetic Foot Clinic King’s College Hospital London UK Haemodinamic Department - Cardiovascular Division Magenta Hospital Milan Italy Center for the Study and Treatment of Diabetic Foot Pathology Abbiategrasso Hospital Milan Italy Center for the Study and Treatment of Diabetic Foot Pathology Abbiategrasso Hospital Abbiategrasso Italy Department of Orthopedics University of Miami Miami USA Department of Surgery Southern Arizona Veterans Affairs Medical Center Tucson USA Surgery Southern Arizona VA Medical Center Tucson USA Podiatric Medicine and Surgery Rosalind Franklin University School of Medicine and Science North Chicago USA Diabetes Department Center of Diabetes Nutrition and Metabolic Disorders Clug-Napoca Romania Diabetes Unit Hadassah University Hospital Jerusalem Israel Diabetes Unit Hadassah Hebrew University Hospital Jerusalem Israel Research Department Generex Biotechnology Corporation Toronto Canada Hadassah Hebrew University Hospital Jerusalem Israel Medical Research Emisphere Technologies Inc. New York USA Profil Institut fuer Stoffwechselforschung GmbH Neuss Germany Profil Institute for Metabolic Research Neuss Germany Management Profil Inst. für Stoffwechselforschung Düsseldorf Germany Institute for Metabolic Research Profil Neuss Germany Biostatistics Harvard School of Public Health Boston USA Clinical Research Phase V Technologies Wellesley Hills US

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Elliptic Flow of Identified Hadrons in Au+Au Collisions at sNN=200 GeV

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Physical review Letters 2003年第18期91卷 182301-182301页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai L. d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Manko Y. Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722 - 44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay Bâtiment 703 F-91191 Gif-sur-Yvette France University of California–Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut für Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York NY 10027 and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo Instituto de

The anisotropy parameter (v2), the second harmonic of the azimuthal particle distribution, has been measured with the PHENIX detector in Au+Au collisions at sNN=200 GeV for identified and inclusive charged particle production at central rapidities (|η|<0.35) with respect to the reaction plane defined at high rapidities (|η|=3–4 ). We observe that the v2 of mesons falls below that of (anti)baryons for pT>2 GeV/c, in marked contrast to the predictions of a hydrodynamical model. A quark-coalescence model is also investigated.

关键词： High energy physics

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Midrapidity Neutral-Pion Production in Proton-Proton Collisions at s=200 GeV

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Physical review Letters 2003年第24期91卷 241803-241803页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees K. A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722 - 44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California–Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut für Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA China Institute of Atomic Energy (CIAE) Beijing Peopleś Republic of China RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo

The invariant differential cross section for inclusive neutral-pion production in p+p collisions at s=200 GeV has been measured at midrapidity (|η|<0.35) over the range 1<pT≲14 GeV/c by the PHENIX experiment... 详细信息

The invariant differential cross section for inclusive neutral-pion production in p+p collisions at s=200 GeV has been measured at midrapidity (|η|<0.35) over the range 1riment at the relativistic Heavy Ion Collider. Predictions of next-to-leading order perturbative QCd calculations are consistent with these measurements. The precision of our result is sufficient to differentiate between prevailing gluon-to-pion fragmentation functions.

关键词： Elementary particles

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Suppressed π0 Production at Large Transverse Momentum in Central Au+Au Collisions at sNN=200 GeV

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Physical review Letters 2003年第7期91卷 072301-072301页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees K. A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai L. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722-44307 Nantes France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California–Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo Instituto de Física

Transverse momentum spectra of neutral pions in the range 1<pT<10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL rHIC in Au+Au collisions at sNN=200 GeV. The π0 multiplicity in centra... 详细信息

Transverse momentum spectra of neutral pions in the range 1red at midrapidity by the PHENIX experiment at BNL rHIC in Au+Au collisions at sNN=200 GeV. The π0 multiplicity in central reactions is significantly below the yields measured at the same sNN in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is ∼2.5 at pT=2 GeV/c and increases to ∼4–5 at pT≈4 GeV/c. At larger pT, the suppression remains constant within errors. The deficit is already apparent in semiperipheral reactions and increases smoothly with centrality.

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Scaling Properties of Proton and Antiproton Production in sNN=200 GeV Au+Au Collisions

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Physical review Letters 2003年第17期91卷 172301-172301页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba J. Alexander r. Amirikas L. Aphecetche S. H. Aronson r. Averbeck T. C. Awes r. Azmoun V. Babintsev A. Baldisseri K. N. Barish P. d. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis A. Bazilevsky S. Belikov Y. Berdnikov S. Bhagavatula J. G. Boissevain H. Borel S. Borenstein M. L. Brooks d. S. Brown N. Bruner d. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard J.-S. Chai P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi J. Choi r. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole P. Constantin d. G. d’Enterria G. david H. delagrange A. denisov A. deshpande E. J. desmond O. dietzsch O. drapier A. drees r. du rietz A. durum d. dutta Y. V. Efremenko K. El Chenawi A. Enokizono H. En’yo S. Esumi L. Ewell d. E. Fields F. Fleuret S. L. Fokin B. d. Fox Z. Fraenkel J. E. Frantz A. Franz A. d. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn G. Gogiberidze M. Gonin J. Gosset Y. Goto r. Granier de Cassagnac N. Grau S. V. Greene G. Grosse Perdekamp W. Guryn H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey r. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill W. Holzmann K. Homma B. Hong A. Hoover T. Ichihara V. V. Ikonnikov K. Imai L. d. Isenhower M. Ishihara M. Issah A. Isupov B. V. Jacak W. Y. Jang Y. Jeong J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo d. Jouan S. Kametani N. Kamihara J. H. Kang S. S. Kapoor K. Katou S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi d. H. Kim d. J. Kim d. W. Kim E. Kim G.-B. Kim H. J. Kim E. Kistenev A. Kiyomichi K. Kiyoyama C. Klein-Boesing H. Kobayashi L. Kochenda V. Kochetkov d. Koehler T. Kohama M. Kopytine d. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg K. Kurita Y. Kuroki M. J. Kweon Y. Kwon G. S. Kyle r. Lacey V. Ladygin J. G. Lajoie A. Lebedev S. Leckey d. M. Lee S. Lee M. J. Leitch X. H. Li H. Lim A. Litvinenko M. X. Liu Y. Liu C. F. Maguire Y. I. Makdisi A. Malakhov V. I. Manko Y. Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Florida State University Tallahassee Florida 32306 USA SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722-44307 Nantes France Department of Physics and Autonomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA Institute for High Energy Physics (IHEP) Protvino Russia Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California–Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA PNPI Petersburg Nuclear Physics Institute Gatchina Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA Iowa State University Ames Iowa 50011 USA St. Petersburg State Technical University St. Petersburg Russia Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France New Mexico State University Las Cruces New Mexico 88003 USA Lawrence Livermore National Laboratory Livermore California 94550 USA KAERI Cyclotron Application Laboratory Seoul South Korea Bhabha Atomic Research Centre Bombay 40 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea Kangnung National University Kangnung 210-702 South Korea Universidade de São Paulo Instituto de Físic

We report on the yield of protons and antiprotons, as a function of centrality and transverse momentum, in Au+Au collisions at sNN=200 GeV measured at midrapidity by the PHENIX experiment at the BNL relativistic Heavy Ion Collider. In central collisions at intermediate transverse momenta (1.5raction of all produced particles are protons and antiprotons. They show a centrality-scaling behavior different from that of pions. The p¯/π and p/π ratios are enhanced compared to peripheral Au+Au, p+p, and e+e− collisions. This enhancement is limited to pT<5 GeV/c as deduced from the ratio of charged hadrons to π0 measured in the range 1.5

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