Parton distributions for LO generators

被引:245
作者
Sherstnev, A. [1 ]
Thorne, R. S. [2 ]
机构
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] UCL, Dept Phys & Astron, London WC1E 6BT, England
来源
EUROPEAN PHYSICAL JOURNAL C | 2008年 / 55卷 / 04期
基金
英国科学技术设施理事会;
关键词
D O I
10.1140/epjc/s10052-008-0610-x
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
We present a study of the results obtained by combining LO partonic matrix elements with either LO or NLO parton distributions. These are compared to the best prediction using NLO for both matrix elements and parton distributions. The aim is to determine which parton distributions are most appropriate to use in those cases where only LO matrix elements are available, e.g. as in many Monte Carlo generators. Both LO and NLO parton distributions have flaws, sometimes serious, for some processes, so a modified optimal LO set is suggested. We investigate a wide variety of processes, and the new modified LO* PDF works at least as well as, and often better than, both LO and NLO PDFs in nearly all cases.
引用
收藏
页码:553 / 575
页数:23
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