在大型强子对撞机的非交换标准模型中对顶夸克和单顶夸克产生的顶夸克横动量和快速分布

Mohamed El Arebi Gadja, Yazid Delenda, Lamine Khodja
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引用次数: 0

摘要

本文全面研究了非交换标准模型中的顶夸克现象学。我们计算了顶夸克对产生的非交换修正平方振幅,以及通过 $t$-channel 和 $tW$-channel 产生单顶夸克的非交换修正平方振幅,同时注意到 $s$-channel 不受非交换几何的影响。利用MadGraph5_aMC@NLO,我们确定了不同质心能量下的总截面,并考察了强耦合$\alpha_S$和非交换参数$\Theta$在先导阶的横动量和速率的差异分布。对于在$t$沟道中的单顶产生,我们采用了一种匹配技术,通过求和将分布的有效性扩展到低$p_t^{top}$值。我们还比较了当时的非交换修正与利用 MCFM 在 NLO 得到的高阶 QCD 修正,以及现有文献在 NNLO 得到的高阶 QCD 修正。我们的发现揭示了非交换几何在高能量下产生的显著偏差,为当前和未来对撞机所能达到的能量尺度上的潜在新物理提供了洞察力。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Transverse momentum and rapidity distributions of top quarks in pair and single top quark production within the non-commutative standard model at the LHC
This paper presents a comprehensive study of top quark phenomenology within the Non-Commutative Standard Model. We calculate non-commutative corrections to the squared amplitudes for top quark pair production, as well as for single top quark production via the $t$-channel and $tW$-channel, while noting that the $s$-channel remains unaffected by non-commutative geometry. Utilizing MadGraph5_aMC@NLO, we determine total cross-sections at various center-of-mass energies and examine differential distributions in transverse momentum and rapidity at leading order in both the strong coupling $\alpha_S$ and the non-commutative parameter $\Theta$. For single top production in the $t$-channel, a matching technique is employed to extend the validity of the distribution to low $p_t^{top}$ values through resummation. We also compare the non-commutative corrections with higher-order QCD corrections obtained at NLO using MCFM and at NNLO from existing literature. Our findings reveal significant deviations arising from non-commutative geometry at high energies, providing insights into potential new physics at energy scales accessible by current and future colliders.
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