Energy loss of fast quarks in nuclei.
Energy loss of fast quarks in nuclei.
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DOI：
10.1103/physrevlett.86.4483
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发表时间：
2000-10
影响因子：
8.6
通讯作者：
Mikkel B. Johnson;B. Kopeliovich;I. Potashnikova;P. McGaughey;J. Moss;J. Peng;G. Garvey;M. Leitch;M. Adams;D. Alde;H. Baer;M. Barlett;C. Brown;W. Cooper;T. Carey;G. Danner;G. Hoffmann;Y. Hsiung;D. Kaplan;A. Klein;C. Lee;J. Lillberg;R. Mccarthy;C. Mishra;M. Wang
中科院分区：
文献类型：
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作者：
Mikkel B. Johnson;B. Kopeliovich;I. Potashnikova;P. McGaughey;J. Moss;J. Peng;G. Garvey;M. Leitch;M. Adams;D. Alde;H. Baer;M. Barlett;C. Brown;W. Cooper;T. Carey;G. Danner;G. Hoffmann;Y. Hsiung;D. Kaplan;A. Klein;C. Lee;J. Lillberg;R. Mccarthy;C. Mishra;M. Wang
我们报告的核依赖性的Drell-Yan双μ子从800 GeV/c质子轰击2 H，C，Ca，Fe和W目标的产量的分析。采用一种新的制定的Drell-Yan过程中的休息帧的核，这种分析研究的效果，初始状态的能量损失和阴影的核依赖比与入射质子的动量分数和双μ子有效质量。所得到的每单位路径长度的能量损失为-dE/dz = 2.32+/-0.52+/-0.5GeV/fm。这是第一次观察到在核环境中运动的部分子的非零能量损失。
We report an analysis of the nuclear dependence of the yield of Drell-Yan dimuons from the 800 GeV/c proton bombardment of 2H, C, Ca, Fe, and W targets. Employing a new formulation of the Drell-Yan process in the rest frame of the nucleus, this analysis examines the effect of initial-state energy loss and shadowing on the nuclear-dependence ratios versus the incident proton's momentum fraction and dimuon effective mass. The resulting energy loss per unit path length is -dE/dz = 2.32+/-0.52+/-0.5 GeV/fm. This is the first observation of a nonzero energy loss of partons traveling in a nuclear environment.