论文标题
用$ \ mathrm {b}τν$最终状态探测LHC的新物理
Probing new physics at the LHC with $\mathrm{b}τν$ final states
论文作者
论文摘要
$ r_ {d^{（\ ast）}} $异常是当今粒子物理学中最有趣的实验结果之一。 Babar，Belle和LHCB等实验与标准模型（SM）测量了一致的张力。我们研究了SM的几个扩展，这些扩展可能可以解释这种张力，例如，在顺序的SM情景下，产生了沉重的$ \ Mathrm {W}^{\ Prime} $ bosons，其leptoquarks具有与第三代费米子的优先耦合，以及通过有效的现场理论进行解释。这样的模型不仅能够解释$ r_ {d^{（\ ast）}} $异常，而且还可以在LHC上产生独特的签名。我们提出了不同的可行性研究，以在LHC处探测这些情况的每一个，考虑了最终状态，其中一个$ \ mathrm {b} $ - 夸克候选人，一个强调衰减的Tau Lepton（$τ_{h} $）和横向动量（$ P^{MISS} _ {\ MATHRM MATHRM} $）。选择标准已针对每个模型进行了优化，以实现最佳信号标志性。在考虑不同的LHC运行条件下进行研究，以$ \ sqrt {s} = 13 \，\ Mathrm {TEV} $和13.6 $ \ MATHRM {TEV} $和不同的发光度（150〜 $ \ $ \ $ \ $ \ MATHRM {fb}^{ - 1}^{ - 1} $和3000〜$ {fbm）
The $R_{D^{(\ast)}}$ anomaly is one of the most intriguing experimental results in particle physics today. Experiments such as BaBar, Belle and LHCb have measured a consistent tension with the standard model (SM). We study several extensions of the SM that could potentially explain this tension, such as production of heavy $\mathrm{W}^{\prime}$ bosons, under the sequential SM scenario, leptoquarks with preferential couplings to third generation fermions, and interpretations through effective field theories. Such models, are not only able to explain the $R_{D^{(\ast)}}$ anomaly but also to produce distinctive signatures at the LHC. We present different feasibility studies to probe each of these scenarios at the LHC, considering final states with one $\mathrm{b}$-quark candidate, one hadronically decaying tau lepton ($τ_{h}$) and missing transverse momentum ($p^{miss}_{\mathrm{T}}$). The selection criteria has been optimized for each model to achieve best signal signficance. The studies are performed considering different LHC running conditions, at $\sqrt{s} = 13 \, \mathrm{TeV}$ and 13.6 $\mathrm{TeV}$, and different luminosities (150~$\mathrm{fb}^{-1}$ and 3000~$\mathrm{fb}^{-1}$).
