Dominant NNLO corrections to four-fermion production near the W-pair production threshold

被引：27
|
作者：
Actis, S. [1 ]
Beneke, M. [1 ]
Falgari, P. [1 ]
Schwinn, C. [1 ]
机构：
[1] Rhein Westfal TH Aachen, Inst Theoret Phys E, D-52056 Aachen, Germany
来源：
NUCLEAR PHYSICS B | 2009年 / 807卷 / 1-2期
关键词：
ELECTROWEAK RADIATIVE-CORRECTIONS; QUARK-ANTIQUARK POTENTIALS; PRODUCTION NEAR-THRESHOLD; E(+)E(-) INTERACTIONS; O(ALPHA) CORRECTIONS; FERMION PROCESSES; CHARGED-CURRENT; CROSS-SECTION; MASS; COLLISIONS;
D O I：
10.1016/j.nuclphysb.2008.08.006
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 calculate the parametrically dominant next-to-next-to-leading order corrections to four-fermion production e(-)e(+) --> mu(-)(nu) over bar (mu)u (d) over bar + X at centre-of-mass energies near the W-pair production threshold employing the method of unstable-particle effective theory. In total the correction is small, leading to a shift of 3 MeV in the W-mass measurement. We also discuss the implementation of realistic cuts and provide a result for the interference of single-Coulomb and soft radiative corrections that can easily be extended to include an arbitrary number of Coulomb photons. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：1 / 32
页数：32
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