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

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.

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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 Hea... 详细信息

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Absence of Suppression in Particle Production at Large Transverse Momentum in sNN=200 GeV d+Au Collisions

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Physical Review Letters 2003年第7期91卷 072303-072303页

作者： S. S. Adler S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba A. Al-Jamel J. Alexander K. Aoki L. Aphecetche R. Armendariz S. H. Aronson R. Averbeck T. C. Awes V. Babintsev A. Baldisseri K. N. Barish P. D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis F. Bauer A. Bazilevsky S. Belikov M. T. Bjorndal J. G. Boissevain H. Borel M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk X. Camard P. Chand W. C. Chang S. Chernichenko C. Y. Chi J. Chiba M. Chiu I. J. Choi R. K. Choudhury T. Chujo V. Cianciolo Y. Cobigo B. A. Cole M. P. Comets P. Constantin M. Csanád T. Csörgő J. P. Cussonneau D. d’Enterria K. Das G. David F. Deák H. Delagrange A. Denisov A. Deshpande E. J. Desmond A. Devismes O. Dietzsch J. L. Drachenberg O. Drapier A. Drees A. Durum D. Dutta V. Dzhordzhadze Y. V. Efremenko H. En’yo B. Espagnon S. Esumi D. E. Fields C. Finck F. Fleuret S. L. Fokin B. D. Fox Z. Fraenkel J. E. Frantz A. Franz A. D. Frawley Y. Fukao S.-Y. Fung S. Gadrat M. Germain A. Glenn M. Gonin J. Gosset Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp H.-Å. Gustafsson T. Hachiya J. S. Haggerty H. Hamagaki A. G. Hansen E. P. Hartouni M. Harvey K. Hasuko R. Hayano X. He M. Heffner T. K. Hemmick J. M. Heuser P. Hidas H. Hiejima J. C. Hill R. Hobbs W. Holzmann K. Homma B. Hong A. Hoover T. Horaguchi T. Ichihara V. V. Ikonnikov K. Imai M. Inuzuka D. Isenhower L. Isenhower M. Issah A. Isupov B. V. Jacak J. Jia O. Jinnouchi B. M. Johnson S. C. Johnson K. S. Joo D. Jouan F. Kajihara S. Kametani N. Kamihara M. Kaneta J. H. Kang K. Katou T. Kawabata A. Kazantsev S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim E. Kim G.-B. Kim H. J. Kim E. Kinney A. Kiss E. Kistenev A. Kiyomichi C. Klein-Boesing H. Kobayashi V. Kochetkov R. Kohara B. Komkov M. Konno D. Kotchetkov A. Kozlov P. J. Kroon C. H. Kuberg G. J. Kunde K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie Y. Le Bornec A. Lebedev S. Leckey D. M. Lee M. J. Leitch M. A. L. Leite X. Li X. H. Li Brookhaven National Laboratory Upton New York 11973-5000 USA Joint Institute for Nuclear Research 141980 Dubna Moscow Region Russia Columbia University New York New York 10027 USA and Nevis Laboratories Irvington New York 10533 USA 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 New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606 Japan 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 USA Institut fuer Kernphysik University of Muenster D-48149 Muenster Germany 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 Lawrence Livermore National Laboratory Livermore California 94550 USA Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Yonsei University IPAP Seoul 120-749 Korea IPN-Orsay Universite Paris Sud CNRS-IN2P3 BP1 F-91406 Orsay France ELTE Eötvös Loránd University H-1117 Budapest Pázmány P. s. 1/A Hungary KFKI Research Institute for Particle and Nuclear Physics (RMKI) H-1525 Budapest 114 P.O. Box 49 Hungary Florida State University Tallahassee Florida 32306 USA Universidade de São Paulo Instituto de Física Ca

Transverse momentum spectra of charged hadrons with pT<8 GeV/c and neutral pions with pT<10 GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in d+Au collisions at sNN=200 GeV. The measured yields are compared to those in p+p collisions at the same sNN scaled up by the number of underlying nucleon-nucleon collisions in d+Au. The yield ratio does not show the suppression observed in central Au+Au collisions at RHIC. Instead, there is a small enhancement in the yield of high momentum particles.

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Measurement of Λ and Λ¯ Particles in Au+Au Collisions at sNN=130 GeV

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Physical Review Letters 2002年第9期89卷 092302-092302页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D’Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En’yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S. -Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H. -Å. Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda V. Kochetkov D. Koehler T. Kohama D. Kotchetkov A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher D. Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes Cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec H3A 2T8 Canada University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physics L

We present results on the measurement of Λ and Λ¯ production in Au+Au collisions at sNN=130 GeV with the PHENIX detector at the Relativistic Heavy Ion Collider. The transverse momentum spectra were measured for minimum bias and for the 5% most central events. The Λ¯/Λ ratios are constant as a function of pT and the number of participants. The measured net Λ density is significantly larger than predicted by models based on hadronic strings (e.g., HIJING) but in approximate agreement with models which include the gluon-junction mechanism.

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Net Charge Fluctuations in Au+Au Interactions at sNN=130 GeV

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Physical Review Letters 2002年第8期89卷 082301-082301页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D’Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En’yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda V. Kochetkov D. Koehler T. Kohama D. Kotchetkov A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher M. Mun Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes-cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec H3A 2T8 Canada University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physics Lund

Data from Au+ Au interactions at sNN=130 GeV, obtained with the PHENIX detector at the Relativistic Heavy-Ion Collider, are used to investigate local net charge fluctuations among particles produced near midrapidity. According to recent suggestions, such fluctuations may carry information from the quark-gluon plasma. This analysis shows that the fluctuations are dominated by a stochastic distribution of particles, but are also sensitive to other effects, like global charge conservation and resonance decays.

关键词： nuclear physics

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Transverse-Mass Dependence of Two-Pion Correlations in Au+Au Collisions at sNN=130GeV

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Physical Review Letters 2002年第19期88卷 192302-192302页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D'Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi A. Enokizono H. En'yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda V. Kochetkov D. Koehler T. Kohama D. Kotchetkov A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühl Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes-Cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec Canada H3A 2T8 University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Hiroshima University Kagamiyama Higashi-Hiroshima 739-8526 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida

Two-pion correlations in sNN=130GeV Au+Au collisions at RHIC have been measured over a broad range of pair transverse momentum kT by the PHENIX experiment at RHIC. The kT dependent transverse radii are similar to results from heavy-ion collisions at sNN=4.1, 4.9, and 17.3 GeV, whereas the longitudinal radius increases monotonically with beam energy. The ratio of the outwards to sidewards transverse radii (Rout/Rside) is consistent with unity and independent of kT.

关键词： Elementary particles

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Flow Measurements via Two-Particle Azimuthal Correlations in Au+Au Collisions at sNN=130 GeV

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Physical Review Letters 2002年第21期89卷 212301-212301页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D’Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En’yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å. Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda V. Kochetkov D. Koehler T. Kohama D. Kotchetkov A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher M. Mu Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes-Cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec Canada H3A 2T8 University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Instituto de Física Universidade de São Paulo Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physics L

Two-particle azimuthal correlation functions are presented for charged hadrons produced in Au+Au collisions at the Relativistic Heavy Ion Collider (sNN=130 GeV). The measurements permit determination of elliptic flow without event-by-event estimation of the reaction plane. The extracted elliptic flow values (v2) show significant sensitivity to both the collision centrality and the transverse momenta of emitted hadrons, suggesting rapid thermalization and relatively strong velocity fields. When scaled by the eccentricity of the collision zone ε, the scaled elliptic flow shows little or no dependence on centrality for charged hadrons with relatively low pT. A breakdown of this ε scaling is observed for charged hadrons with pT >1.0 GeV/c.

关键词： High energy physics

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Event-by-event fluctuations in mean pT and mean eT in sNN=130 GeV Au+Au collisions

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Physical Review C 2002年第2期66卷 024901-024901页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D’Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En’yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å. Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda V. Kochetkov D. Koehler T. Kohama D. Kotchetkov A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher M. Mu Vanderbilt University Nashville Tennesse 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) Boîte Postale 20722-44307 Nantes-cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec Canada H3A 2T8 University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physi

Distributions of event-by-event fluctuations of the mean transverse momentum and mean transverse energy near mid-rapidity have been measured in Au+Au collisions at sNN=130 GeV at the Relativistic Heavy-Ion Collider. By comparing the distributions to what is expected for statistically independent particle emission, the magnitude of nonstatistical fluctuations in mean transverse momentum is determined to be consistent with zero. Also, no significant nonrandom fluctuations in mean transverse energy are observed. By constructing a fluctuation model with two event classes that preserve the mean and variance of the semi-inclusive pT or eT spectra, we exclude a region of fluctuations in sNN=130 GeV Au+Au collisions.

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Centrality Dependence of Charged Particle Multiplicity in Au-Au Collisions at sNN=130GeV

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Physical Review Letters 2001年第16期86卷 3500-3500页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D'Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En'yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å. Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda D. Kochetkov V. Kochetkov D. Koehler T. Kohama A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher M. Muniru Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes-cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec H3A 2T8 Canada University of New Mexico Albuquerque New Mexico Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute ” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 Sào Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physics Lund Uni

We present results for the charged-particle multiplicity distribution at midrapidity in Au-Au collisions at sNN=130GeV measured with the PHENIX detector at RHIC. For the 5% most central collisions we find dNch/dη|η=0=622±1(stat)±41(syst). The results, analyzed as a function of centrality, show a steady rise of the particle density per participating nucleon with centrality.

关键词： High energy physics

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Measurement of the Midrapidity Transverse Energy Distribution from sNN=130GeV Au+Au Collisions at RHIC

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Physical Review Letters 2001年第5期87卷 052301-052301页

作者： K. Adcox S. S. Adler N. N. Ajitanand Y. Akiba J. Alexander L. Aphecetche Y. Arai S. H. Aronson R. Averbeck T. C. Awes K. N. Barish P. D. Barnes J. Barrette B. Bassalleck S. Bathe V. Baublis A. Bazilevsky S. Belikov F. G. Bellaiche S. T. Belyaev M. J. Bennett Y. Berdnikov S. Botelho M. L. Brooks D. S. Brown N. Bruner D. Bucher H. Buesching V. Bumazhnov G. Bunce J. Burward-Hoy S. Butsyk T. A. Carey P. Chand J. Chang W. C. Chang L. L. Chavez S. Chernichenko C. Y. Chi J. Chiba M. Chiu R. K. Choudhury T. Christ T. Chujo M. S. Chung P. Chung V. Cianciolo B. A. Cole D. G. D'Enterria G. David H. Delagrange A. Denisov A. Deshpande E. J. Desmond O. Dietzsch B. V. Dinesh A. Drees A. Durum D. Dutta K. Ebisu Y. V. Efremenko K. El Chenawi H. En'yo S. Esumi L. Ewell T. Ferdousi D. E. Fields S. L. Fokin Z. Fraenkel A. Franz A. D. Frawley S.-Y. Fung S. Garpman T. K. Ghosh A. Glenn A. L. Godoi Y. Goto S. V. Greene M. Grosse Perdekamp S. K. Gupta W. Guryn H.-Å. Gustafsson J. S. Haggerty H. Hamagaki A. G. Hansen H. Hara E. P. Hartouni R. Hayano N. Hayashi X. He T. K. Hemmick J. M. Heuser M. Hibino J. C. Hill D. S. Ho K. Homma B. Hong A. Hoover T. Ichihara K. Imai M. S. Ippolitov M. Ishihara B. V. Jacak W. Y. Jang J. Jia B. M. Johnson S. C. Johnson K. S. Joo S. Kametani J. H. Kang M. Kann S. S. Kapoor S. Kelly B. Khachaturov A. Khanzadeev J. Kikuchi D. J. Kim H. J. Kim S. Y. Kim Y. G. Kim W. W. Kinnison E. Kistenev A. Kiyomichi C. Klein-Boesing S. Klinksiek L. Kochenda D. Kochetkov V. Kochetkov D. Koehler T. Kohama A. Kozlov P. J. Kroon K. Kurita M. J. Kweon Y. Kwon G. S. Kyle R. Lacey J. G. Lajoie J. Lauret A. Lebedev D. M. Lee M. J. Leitch X. H. Li Z. Li D. J. Lim M. X. Liu X. Liu Z. Liu C. F. Maguire J. Mahon Y. I. Makdisi V. I. Manko Y. Mao S. K. Mark S. Markacs G. Martinez M. D. Marx A. Masaike F. Matathias T. Matsumoto P. L. McGaughey E. Melnikov M. Merschmeyer F. Messer M. Messer Y. Miake T. E. Miller A. Milov S. Mioduszewski R. E. Mischke G. C. Mishra J. T. Mitchell A. K. Mohanty D. P. Morrison J. M. Moss F. Mühlbacher M. Mun Vanderbilt University Nashville Tennessee 37235 Brookhaven National Laboratory Upton New York 11973-5000 Chemistry Department State University of New York–Stony Brook Stony Brook New York 11794 KEK High Energy Accelerator Research Organization Tsukuba-shi Ibaraki-ken 305-0801 Japan SUBATECH (Ecole des Mines de Nantes IN2P3/CNRS Universite de Nantes) BP 20722-44307 Nantes-Cedex 3 France Department of Physics and Astronomy State University of New York–Stony Brook Stony Brook New York 11794 Oak Ridge National Laboratory Oak Ridge Tennessee 37831 University of California–Riverside Riverside California 92521 Los Alamos National Laboratory Los Alamos New Mexico 87545 McGill University Montreal Quebec Canada H3A 2T8 University of New Mexico Albuquerque New Mexico 87131 Institut für Kernphysik University of Münster D-48149 Münster Germany PNPI Petersburg Nuclear Physics Institute Gatchina Russia Institute for High Energy Physics (IHEP) Protvino Russia RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 Iowa State University Ames Iowa 50011 Russian Research Center “Kurchatov Institute” Moscow Russia St. Petersburg State Technical University St. Petersburg Russia Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil New Mexico State University Las Cruces New Mexico 88003 Bhabha Atomic Research Centre Bombay 400 085 India Institute of Physics Academia Sinica Taipei 11529 Taiwan Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Korea University Seoul 136-701 Korea Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Kyoto University Kyoto 606 Japan RIKEN (The Institute of Physical and Chemical Research) Wako Saitama 351-0198 Japan Weizmann Institute Rehovot 76100 Israel Florida State University Tallahassee Florida 32306 Department of Physics L

The first measurement of energy produced transverse to the beam direction at the Relativistic Heavy-Ion Collider at Brookhaven National Laboratory is presented. The midrapidity transverse energy density per participating nucleon rises steadily with the number of participants, closely paralleling the rise in charged-particle density, such that 〈ET〉/〈Nch〉 remains relatively constant as a function of centrality. The energy density calculated via Bjorken’s prescription for the 2% most central Au+Au collisions at sNN=130GeV is at least εBj=4.6GeV/fm3, which is a factor of 1.6 larger than found at sNN=17.2GeV ( Pb+Pb at CERN).

关键词： Particle beam extraction

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