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arXiv 2209.02599hep-ph
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NLO与POWHEG的共振轻夸克

Resonant leptoquark at NLO with POWHEG

Luca Buonocore, Admir Greljo, Peter Krack, Paolo Nason, Nudzeim Selimovic, Francesco Tramontano, Giulia Zanderighi

摘要:

最近在计算质子内部轻子密度函数和模拟轻子簇射方面取得的进展为在强子对撞机上精确研究共振轻夸克的产生奠定了基础。夸克-轻子直接融合成轻夸克是LHC的一个新的产生通道,它有可能探测到大质量和耦合的唯一参数空间。在这项工作中,我们建立了第一个Monte Carlo事件发生器,用于在NLO生产过程中对该过程进行全面模拟,然后使用POWHEG方法进行随后的衰变,并利用HERWIG匹配部分子簇射。该代码可以处理所有具有可重整化夸克-轻子相互作用的标量轻子模型。然后,我们全面研究了微分分布,包括高阶效应,并评估了相应的理论不确定性。我们还量化了改进后的预测对预计(HL-)LHC灵敏度的影响,并在FCC-hh开始了对潜力的首次探索。我们的工作为使用该通道进行LHC搜索铺平了道路。

英文摘要:

Recent progress in calculating lepton density functions inside the proton and simulating lepton showers laid the foundations for precision studies of resonant leptoquark production at hadron colliders. Direct quark-lepton fusion into a leptoquark is a novel production channel at the LHC that has the potential to probe a unique parameter space for large masses and couplings. In this work, we build the first Monte Carlo event generator for a full-fledged simulation of this process at NLO for production, followed by a subsequent decay using the POWHEG method and matching to the parton showers utilizing HERWIG. The code can handle all scalar leptoquark models with renormalisable quark-lepton interactions. We then comprehensively study the differential distributions, including higher-order effects, and asses the corresponding theoretical uncertainties. We also quantify the impact of the improved predictions on the projected (HL-)LHC sensitivities and initiate the first exploration of the potential at the FCC-hh. Our work paves the way toward performing LHC searches using this channel.

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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