arXiv 1610.089852016-10-27hep-phhep-ex

在有效左右对称模式中用部分子簇射匹配的次领先阶自动中微子喷流和顶喷流预报

Automated Neutrino Jet and Top Jet Predictions at Next-to-Leading-Order with Parton Shower Matching in Effective Left-Right Symmetric Models

Olivier Mattelaer, Manimala Mitra, Richard Ruiz

备注：: 28 pages, 7 figures, and 3 small appendices. Model files available from http://feynrules.irmp.ucl.ac.be/wiki/EffLRSM Happy Halloween!

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摘要：

增强共振的强子衰变，例如，强子超级对撞机上的顶夸克喷流是粒子物理学标准模型在TeV尺度上扩展的频繁预测。在这种情况下，QCD辐射的精确建模是可信的预测所必需的。我们提出了一个有效的左右对称模型（LRSM），具有$W_R^\pm, Z_R$规范玻色子和重Majorana中微子$N$的QCD校正与部分子簇射（PS）匹配的全微分，次领先阶（NLO）的自动化。公开可用的通用模型文件需要显着更少的用户输入预测基准对撞机过程比领先的顺序LRSM建设。我们提出的预测包括$W_R^\pm, Z_R$生产的$\sqrt{s} = 13$ TeV的大型强子对撞机（LHC）和一个假设的未来100 TeV的超大型强子对撞机（VLHC），以及包括$N$生产的一个假设的大型强子电子对撞机（LHeC）。作为一个案例研究，我们在NLO+PS精度下研究了LHC上高质量$W_R$玻色子衰变产生的重中微子（色单线态）喷注和顶夸克（色三线态）喷注的性质。与顶喷流相反，我们发现重中微子喷流的运动学性质，特别是喷流质量，对部分子簇射和硬QCD辐射的影响有弹性。这表明，在寻找中微子喷流时，可以在最小的信号损失下施加不适合顶部喷流的积极选择削减。

英文摘要：

Hadronic decays of boosted resonances, e.g., top quark jets, at hadronic super colliders are frequent predictions in TeV-scale extensions of the Standard Model of Particle Physics. In such scenarios, accurate modeling of QCD radiation is necessary for trustworthy predictions. We present the automation of fully differential, next-to-leading-order (NLO) in QCD corrections with parton shower (PS) matching for an effective Left-Right Symmetric Model (LRSM) that features $W_R^\pm, Z_R$ gauge bosons and heavy Majorana neutrinos $N$. Publicly available universal model files require remarkably fewer user inputs for predicting benchmark collider processes than leading order LRSM constructions. We present predictions for inclusive $W_R^\pm, Z_R$ production at the $\sqrt{s} = 13$ TeV Large Hadron Collider (LHC) and a hypothetical future 100 TeV Very Large Hadron Collider (VLHC), as well as inclusive $N$ production for a hypothetical Large Hadron Electron Collider (LHeC). As a case study, we investigate at NLO+PS accuracy the properties of heavy neutrino (color-singlet) jets and top quark (color-triplet) jets from decays of high-mass $W_R$ bosons at the LHC. Contrary to top jets, we find that the kinematic properties of heavy neutrinos jets, and in particular jet mass, are resilient against the effects of parton showers and hard QCD radiation. This suggests that in searches for neutrino jets, aggressive selection cuts that would otherwise be inappropriate for top jets can be imposed with minimal signal loss.

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