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arXiv 0907.1105hep-ph
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强子对撞机上Gaugino对产生的横动量重算

Transverse-momentum resummation for gaugino-pair production at hadron colliders

Jonathan Debove, Benjamin Fuks, Michael Klasen

摘要:

我们提出了第一个精确分析的横向动量谱的高吉诺对产生的Tevatron和大型强子对撞机的质心能量为1.96和10或14 TeV,分别。我们的计算是基于一个通用的再确认形式主义在下一个领先的对数精度,这是一贯匹配的微扰预测在${\cal O}(α_s)$。本文给出了在约束最小超对称标准模型中两个典型基准点上中性伴子和电荷伴子的“镀金”关联产生以及中性伴子和电荷伴子的成对产生的数值结果。我们发现,匹配的remation结果有很大的不同,从传统的实验分析中采用的Monte Carlo预测,并讨论了超对称质量参数的确定从派生的横向质谱的影响。我们还详细研究了来自尺度和部分子密度函数变化和非微扰效应的理论不确定性。

英文摘要:

We present a first precision analysis of the transverse-momentum spectrum of gaugino pairs produced at the Tevatron and the LHC with center-of-mass energies of 1.96 and 10 or 14 TeV, respectively. Our calculation is based on a universal resummation formalism at next-to-leading logarithmic accuracy, which is consistently matched to the perturbative prediction at ${\cal O}(α_s)$. Numerical results are given for the "gold-plated" associated production of neutralinos and charginos decaying into three charged leptons with missing transverse energy as well as for the pair production of neutralinos and charginos at two typical benchmark points in the constrained Minimal Supersymmetric Standard Model. We show that the matched resummation results differ considerably from the Monte Carlo predictions employed traditionally in experimental analyses and discuss the impact on the determination of supersymmetric mass parameters from derived transverse-mass spectra. We also investigate in detail the theoretical uncertainties coming from scale and parton-density function variations and non-perturbative effects.

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。

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