A QCD description of the ATLAS jet veto measurement

作者：Hatta Y^*; Marquet C; Royon C; Soyez G; Ueda T; Werder D

来源：Physical Review D - Particles, Fields, Gravitation and Cosmology, 2013, 87(5): 054016.

DOI：10.1103/PhysRevD.87.054016

We present a new QCD description of the ATLAS jet veto measurement, using the Banfi-Marchesini-Smye equation to constrain the interjet QCD radiation. This equation resums emissions of soft gluons at large angles, at leading-logarithmic accuracy, and accounts for both the so-called Sudakov and nonglobal logarithms. We show that this approach is able to reproduce, with no fitting parameters, the fraction of high-p(T) forward-backward dijet events which do not contain additional hard emissions in the interjet rapidity range. We also compute the gap fraction in fixed-order perturbation theory to O(alpha(2)(s)) and show that the perturbative series is unstable at large rapidity intervals. DOI: 10.1103/PhysRevD.87.054016

• 出版日期2013-3-12
• 单位中国地震局