arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0709.3057hep-phhep-ex
收藏

强子对撞机上slepton对产生的联合再确认

Joint resummation for slepton pair production at hadron colliders

G. Bozzi, B. Fuks, M. Klasen

摘要:

本文给出了强子对撞机上超对称粒子对产生的横动量分布和不变质量分布的精确计算,重点研究了CERN大型强子对撞机上类Drell-Yan slepton对和slepton-sneutrino的相关产生.我们实现的联合重申形式主义在下一个领先的对数精度与过程无关的Sudakov形状因子,从而确保软胶子发射的通用描述,并始终匹配所获得的结果与纯微扰结果在一阶强耦合常数,即在O(alpha_s)。我们还实现了三个不同的最近的非微扰效应的参数化。在数值上,我们给出了~e_R ~e_R^* 产生的预言,并将计算的截面与微扰结果进行了比较.对非物理尺度的依赖被发现减少,非微扰的贡献仍然很小。

英文摘要:

We present a precision calculation of the transverse-momentum and invariant-mass distributions for supersymmetric particle pair production at hadron colliders, focusing on Drell-Yan like slepton pair and slepton-sneutrino associated production at the CERN Large Hadron Collider. We implement the joint resummation formalism at the next-to-leading logarithmic accuracy with a process-independent Sudakov form factor, thus ensuring a universal description of soft-gluon emission, and consistently match the obtained result with the pure perturbative result at the first order in the strong coupling constant, i.e. at O(alpha_s). We also implement three different recent parameterizations of non-perturbative effects. Numerically, we give predictions for ~e_R ~e_R^* production and compare the resummed cross section with the perturbative result. The dependence on unphysical scales is found to be reduced, and non-perturbative contributions remain small.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑