Limits on the production of direct protons in 200A GeV 32S+Au collisions.

Limits on the production of direct protons in 200A GeV 32S+Au collisions.
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DOI：
10.1103/physrevlett.76.3506
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发表时间：
1996-05
期刊：
Physical review letters
影响因子：
8.6
通讯作者：
R. Albrecht;V. Antonenko;T. Awes;C. Barlag;F. Berger;M. Bloomer;C. Blume;D. Bock;R. Bock;E. Bohne;D. Bucher;G. Claesson;A. Claussen;G. Clewing;R. Debbe;L. Dragon;Yu. G. Dubovik;A. Eklund;S. Fokin;A. Franz;S. Garpman;R. Glasow;H. Gustafsson;H. Gutbrod;O. Hansen;G. Holker;J. Idh;M. Ippolitov;P. Jacobs;K. Kampert;K. Karadjev;B. Kolb;A. Lebedev;H. Löhner;I. Lund;V. Manko;B. Moskowitz;S. Nikolaev;J. Nystrand;F. Obenshain;A. Oskarsson;I. Otterlund;T. Peitzmann;F. Plasil;A. Poskanzer;M. Purschke;H. Ritter;B. Roters;S. Saini;R. Santo;H. Schlagheck;H. Schmidt;K. Söderström;S. Sorensen;P. Stankus;K. Steffens;P. Steinhaeuser;E. Stenlund;D. Stüken;A. Vinogradov;H. Wegner;G. Young
R. Albrecht;V. Antonenko;T. Awes;C. Barlag;F. Berger;M. Bloomer;C. Blume;D. Bock;R. Bock;E. Bohne;D. Bucher;G. Claesson;A. Claussen;G. Clewing;R. Debbe;L. Dragon;Yu. G. Dubovik;A. Eklund;S. Fokin;A. Franz;S. Garpman;R. Glasow;H. Gustafsson;H. Gutbrod;O. Hansen;G. Holker;J. Idh;M. Ippolitov;P. Jacobs;K. Kampert;K. Karadjev;B. Kolb;A. Lebedev;H. Löhner;I. Lund;V. Manko;B. Moskowitz;S. Nikolaev;J. Nystrand;F. Obenshain;A. Oskarsson;I. Otterlund;T. Peitzmann;F. Plasil;A. Poskanzer;M. Purschke;H. Ritter;B. Roters;S. Saini;R. Santo;H. Schlagheck;H. Schmidt;K. Söderström;S. Sorensen;P. Stankus;K. Steffens;P. Steinhaeuser;E. Stenlund;D. Stüken;A. Vinogradov;H. Wegner;G. Young
中科院分区：
物理与天体物理1区
文献类型：
--
作者：
R. Albrecht;V. Antonenko;T. Awes;C. Barlag;F. Berger;M. Bloomer;C. Blume;D. Bock;R. Bock;E. Bohne;D. Bucher;G. Claesson;A. Claussen;G. Clewing;R. Debbe;L. Dragon;Yu. G. Dubovik;A. Eklund;S. Fokin;A. Franz;S. Garpman;R. Glasow;H. Gustafsson;H. Gutbrod;O. Hansen;G. Holker;J. Idh;M. Ippolitov;P. Jacobs;K. Kampert;K. Karadjev;B. Kolb;A. Lebedev;H. Löhner;I. Lund;V. Manko;B. Moskowitz;S. Nikolaev;J. Nystrand;F. Obenshain;A. Oskarsson;I. Otterlund;T. Peitzmann;F. Plasil;A. Poskanzer;M. Purschke;H. Ritter;B. Roters;S. Saini;R. Santo;H. Schlagheck;H. Schmidt;K. Söderström;S. Sorensen;P. Stankus;K. Steffens;P. Steinhaeuser;E. Stenlund;D. Stüken;A. Vinogradov;H. Wegner;G. Young

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CERN-WA80 实验已经对 200A GeV 的 S+An 碰撞中直接光子的产生进行了研究。对于中心碰撞，在每个 pr 测量的光子过剩，在 0.5 小于或等于 p(T) 小于或等于小于或等于 2.5 GeV/c 的范围内平均，对应于总包容性光子产量的 5.0%，统计误差为 sigma(stat) = 0.8%，系统误差为 sigma(syst) = 5.8%。 90% C.L. 下直接光子产生的不变产率上限被提出。讨论了高能重离子碰撞动力学的可能影响。
A search for the production of direct photons in S + An collisions at 200A GeV has been carried out in the CERN-WA80 experiment. For central collisions the measured photon excess at each pr, averaged over the range 0.5 less than or equal to p(T) less than or equal to less than or equal to 2.5 GeV/c, corresponded to 5.0% of the total inclusive photon yield with a statistical error of sigma(stat) = 0.8% and a systematic error of sigma(syst) = 5.8%. Upper limits on the invariant yield for direct photon production at the 90% C.L. are presented. Possible implications for the dynamics of high-energy heavy-ion collisions are discussed.