Unintegrated CCFM parton distributions and transverse momentum of gauge bosons

被引：17
|
作者：
Kwiecinski, J
Szczurek, A
机构：
[1] Inst Nucl Phys, PL-31342 Krakow, Poland
[2] Univ Rzeszow, PL-35959 Rzeszow, Poland
来源：
NUCLEAR PHYSICS B | 2004年 / 680卷 / 1-3期
关键词：
D O I：
10.1016/j.nuclphysb.2003.12.038
中图分类号：
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号：
摘要：
Transverse momentum distribution of gauge bosons W+/- and Z(0) is calculated using unintegrated parton distributions obtained by solving leading order CCFM equation(s) in the impact parameter space. For illustration we compare the results of the fixed-order collinear, soft-gluon resummation and CCFM approaches. A parameter of a nonperturbative form factor is adjusted to the D0 data. In contrast to the collinear approach, the leading order calculation based on the unintegrated CCFM parton distributions generates transverse momentum distributions of gauge bosons, which are almost consistent with experimental data provided the parameter of the nonperturbative form factor is appropriately adjusted. The W+-W- asymmetry is calculated as a function of the boson rapidity and transverse momentum. Predictions are given for RHIC and LHC. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：164 / 176
页数：13
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