Bernreuther W, Bonciani R, Gehrmann T, Heinesch R, Leineweber T, Mastrolia P, Remiddi E
Institut für Theoretische Physik, RWTH Aachen, Germany.
Phys Rev Lett. 2005 Dec 31;95(26):261802. doi: 10.1103/PhysRevLett.95.261802. Epub 2005 Dec 19.
Interactions of heavy quarks, in particular, of top quarks, with electroweak gauge bosons are expected to be very sensitive to new physics effects related to electroweak symmetry breaking. These interactions are described by the so-called static form factors, which include anomalous magnetic moments and the effective weak charges. We compute the second-order QCD corrections to these static form factors, which turn out to be sizable and need to be taken into account in searches for new anomalous coupling effects.
重夸克，特别是顶夸克，与弱电规范玻色子的相互作用预计对与弱电对称性破缺相关的新物理效应非常敏感。这些相互作用由所谓的静态形状因子描述，其中包括反常磁矩和有效弱电荷。我们计算了这些静态形状因子的二阶量子色动力学修正，结果表明该修正是相当可观的，在寻找新的反常耦合效应时需要考虑进去。
