Constraints on quark energy loss from Drell-Yan data

被引：41
作者：
Arleo, F
机构：
[1] ECT, I-38050 Trent, Italy
[2] Ist Nazl Fis Nucl, GC Trento, I-38050 Trent, Italy
来源：
PHYSICS LETTERS B | 2002年 / 532卷 / 3-4期
关键词：
Drell-Yan process; energy loss; shadowing;
D O I：
10.1016/S0370-2693(02)01539-3
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
A leading-order analysis of E866/NuSea and NA3 Drell-Yan data in nuclei is carried out. At Fermilab energy, the large uncertainties in the amount of sea quark shadowing prohibit clarifying the origin of the nuclear dependence observed experimentally. On the other hand, the small shadowing contribution to the Drell-Yan process in pi(-)-A collisions at SPS allows one to set tight constraints on the energy loss of fast quarks in nuclear matter. We find the transport coefficient to be (q) over bar= 0.24 +/- 0.18 GeV/fm(2) that corresponds to a mean energy loss per unit length -dE/dz = 0.20 +/- 0.15 GeV/fm for E-q > 50 GeV quarks in a large (A approximate to 200) nucleus. (C) 2002 Published by Elsevier Science B.V.
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页码：231 / 239
页数：9
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