Angular distribution of leptons from the decay of massive vector bosons
Angular distribution of leptons from the decay of massive vector bosons
复制标题
DOI：
10.1016/j.physletb.2007.09.008
复制
发表时间：
2007-07
影响因子：
4.4
通讯作者：
E. Berger;J. Qiu;Ricardo A. Rodriguez-Pedraza
中科院分区：
文献类型：
--
作者：
E. Berger;J. Qiu;Ricardo A. Rodriguez-Pedraza
我们研究了强子反应中质量为 Q 的大质量矢量玻色子的螺旋结构函数的横向动量 Q⊥ 依赖性。我们证明，螺旋度结构函数中 ln(Q/Q⊥) 形式的大对数项与角积分截面中的对数项具有相同的起源，并且它们可以以与角积分截面相同的方式恢复为强耦合 αs 中的所有阶。作为电流守恒的结果，螺旋结构函数的恢复部分保留了作为 Q⊥ 到 αs 中所有阶的函数的 Lam-Tung 关系。
We examine the transverse momentum Q⊥dependence of the helicity structure functions for massive vector bosons of mass Q in hadron reactions. We demonstrate that large logarithmic terms of the form ln(Q/Q⊥) in the helicity structure functions have the same origin as the logarithmic terms in the angular-integrated cross section and that they can be resummed to all orders in the strong coupling αs, in the same way as the angular-integrated cross section. As a consequence of current conservation, the resummed part of the helicity structure functions preserves the Lam–Tung relation as a function of Q⊥to all orders in αs.