Two-loop soft corrections and resummation of the thrust distribution in the dijet region

被引：113

作者：

Monni, Pier Francesco ^{[1
]}

Gehrmann, Thomas ^{[1
]}

Luisoni, Gionata ^{[2
]}

机构：

[1] Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland

[2] Univ Durham, Inst Particle Phys Phenomenol, Sci Labs, Durham DH1 3LE, England

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2011年 / 08期

基金：

美国国家科学基金会; 瑞士国家科学基金会;

关键词：

QCD Phenomenology; JET CROSS-SECTIONS; E(+)E(-) ANNIHILATION DATA; EXPANDING HYPERGEOMETRIC-FUNCTIONS; 3-LOOP SPLITTING FUNCTIONS; EVENT SHAPE DISTRIBUTIONS; ELECTROWEAK CORRECTIONS; INFRARED FACTORIZATION; DELPHI DETECTOR; HADRONIC EVENTS; QCD;

D O I：

10.1007/JHEP08(2011)010

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：

The thrust distribution in electron-positron annihilation is a classical precision QCD observable. Using renormalization group (RG) evolution in Laplace space, we perform the resummation of logarithmically enhanced corrections in the dijet limit, T -> 1 to next-to-next-to-leading logarithmic (NNLL) accuracy. We independently derive the two-loop soft function for the thrust distribution and extract an analytical expression for the NNLL resummation coefficient g(3). Our findings confirm earlier NNLL resummation results for the thrust distribution in soft-collinear effective theory. To combine the resummed expressions with the fixed-order results, we derive the log(R)-matching and R-matching of the NNLL approximation to the fixed-order NNLO distribution.

引用

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