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作者机构: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 Stony Brook SUNY New York 11794-3400 USA RIKEN Nishina Center for Accelerator-Based Science Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606-8502 Japan SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722 - 44307 Nantes France Brookhaven National Laboratory Upton New York 11973-5000 USA Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino 142281 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 PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad region 188300 Russia Iowa State University Ames Iowa 50011 USA Saint Petersburg State Polytechnic University St. Petersburg Russia Institut für Kernphysik University of Muenster D-48149 Muenster Germany KAERI Cyclotron Application Laboratory Seoul Korea KEK High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan Yonsei University IPAP Seoul 120-749 Korea Vanderbilt University Nashville Tennessee 37235 USA Georgia State University Atlanta Georgia 30303 USA 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 of the Hungarian Academy of Sciences (MTA KFKI RMKI) H-1525 Budapest 114 POBox 49 Budapest Hungary Florida State University Tallahassee Florida 32306 USA Universidade de São Paulo Instituto de Física Caixa Postal 66318 São Paulo CEP05315-970 Brazil Abilene Christian University Abilene Texas 79699 USA Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France Weizmann Institute Rehovot 76100 Israel University of Tennessee Knoxville Tennessee 37996 USA Hiroshima University Kagamiyama Higashi-Hiroshima 739-8526 Japan Institute of Physics University of Tsukuba Tsukuba Ibaraki 305 Japan Russian Research Center “Kurchatov Institute” Moscow Russia LPC Université Blaise Pascal CNRS-IN2P3 Clermont-Fd 63177 Aubiere Cedex France University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Center for Nuclear Study Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan Department of Physics Lund University Box 118 SE-221 00 Lund Sweden Lawrence Livermore National Laboratory Livermore California 94550 USA Korea University Seoul 136-701 Korea Department of Physics Tokyo Institute of Technology Oh-okayama Meguro Tokyo 152-8551 Japan Myongji University Yongin Kyonggido 449-728 Korea Waseda University Advanced Research Institute for Science and Engineering 17 Kikui-cho Shinjuku-ku Tokyo 162-0044 Japan University of Colorado Boulder Colorado 80309 USA System Electronics Laboratory Seoul National University Seoul Korea Physics Department Rikkyo University 3-34-1 Nishi-Ikebukuro Toshima Tokyo 171-8501 Japan Department of Physics Banaras Hindu University Varanasi 221005 India Nagasaki Institute of Applied Science Nagasaki-shi Nagasaki 851-0193 Japan Debrecen University H-4010 Debrecen Egyetem tér 1 Hungary
出 版 物:《Physical Review Letters》 (Phys Rev Lett)
年 卷 期:2009年第103卷第14期
页 面:142301-142301页
核心收录:
基 金:DOE NSF (USA) MEXT JSPS (Japan) CNPq FAPESP (Brazil) NSFC (China) IN2P3/CNRS CEA (France) BMBF DAAD AvH (Germany) OTKA (Hungary) DAE (India) ISF (Israel) KRF KOSEF (Korea) MES RAS FAAE (Russia) VR KAW (Sweden) U. S. CRDF for the FSU U. S.-Hungarian NSF-OTKA-MTA U. S.-Israel BSF
摘 要:Bose-Einstein correlations of charged kaons are used to probe Au+Au collisions at sNN=200 GeV and are compared to charged pion probes, which have a larger hadronic scattering cross section. Three-dimensional Gaussian source radii are extracted, along with a one-dimensional kaon emission source function. The centrality dependences of the three Gaussian radii are well described by a single linear function of Npart1/3 with a zero intercept. Imaging analysis shows a deviation from a Gaussian tail at r≳10 fm, although the bulk emission at lower radius is well described by a Gaussian. The presence of a non-Gaussian tail in the kaon source reaffirms that the particle emission region in a heavy-ion collision is extended, and that similar measurements with pions are not solely due to the decay of long-lived resonances.