"Acceptance $\times$ Efficiency ZPhiH tau" of "Search for a scalar or pseudoscalar dilepton resonance produced in association with a massive vector boson or top quark-antiquark pair in multilepton events at $\sqrt{s}$ = 13 TeV"

A search for beyond the standard model spin-0 bosons, $\phi$, that decay into pairs of electrons, muons, or tau leptons is presented. The search targets the associated production of such bosons with a $\mathrm{W}$ boson, a $\mathrm{Z}$ boson, or a top quark-antiquark pair, and uses events with three or four charged leptons, including hadronically decaying tau leptons. The proton-proton collision dataset used in the analysis was collected by the CMS experiment at the LHC in 2016-2018 at a center-of-mass energy of $13\,\mathrm{TeV}$, and corresponds to an integrated luminosity of $138\,\mathrm{fb}^{-1}$. The observations are consistent with the expectations from standard model processes. Upper limits at $95\%$ confidence level are placed on the product of the cross sections and branching fractions of such new particles with scalar, pseudoscalar, or Higgs-like couplings, as well as the product of coupling parameters and branching fractions. These are the most restrictive direct limits in these production and decay modes on an extension of the standard model with scalar or pseudoscalar particles. Several model-dependent exclusions are also presented. For a Higgs-like $\phi$ model, limits are set on the mixing angle of the Higgs boson with the $\phi$ boson. For the associated production of a $\phi$ boson with a top quark-antiquark pair, limits are set on the coupling to top quarks. Finally, limits are set for the first time on a fermiophilic dilaton-like model with scalar couplings and an axion-like model with pseudoscalar couplings.本文呈现了一项针对衰变至电子、μ子（muons）或τ轻子（tau leptons）对的超出标准模型（beyond the Standard Model）自旋为0的玻色子（spin-0 bosons）φ的搜寻分析。本次搜寻的目标为该类玻色子分别与W玻色子（W boson）、Z玻色子（Z boson）或顶夸克-反夸克对（top quark-antiquark pair）的伴随产生过程，分析数据集包含带有3个或4个带电轻子（charged leptons，含强衰变τ轻子（hadronically decaying tau leptons））的事例。本分析所用的质子-质子碰撞（proton-proton collision）数据集，由大型强子对撞机（Large Hadron Collider, LHC）上的CMS实验（CMS experiment）于2016至2018年间采集，质心系能量（center-of-mass energy）为13 TeV，对应积分亮度（integrated luminosity）为138 fb⁻¹。观测结果与标准模型过程的理论预期相符。针对此类带有标量耦合（scalar couplings）、赝标量耦合（pseudoscalar couplings）或类希格斯耦合（Higgs-like couplings）的新粒子，我们给出了95%置信度（confidence level）下的截面（cross sections）与分支比（branching fractions）乘积的上限，同时给出了耦合参数（coupling parameters）与分支比乘积的上限。在这类产生与衰变道（production and decay modes）中，本结果是针对标量或赝标量粒子扩展标准模型的最严格直接限制。本文同时给出了若干依赖于模型的排除范围（model-dependent exclusions）。针对类希格斯φ模型，我们给出了希格斯玻色子与φ玻色子的混合角（mixing angle）限制。针对φ玻色子与顶夸克-反夸克对的伴随产生过程，我们给出了其与顶夸克的耦合参数限制。最后，我们首次针对带有标量耦合的费米嗜性类膨胀子模型（fermiophilic dilaton-like model），以及带有赝标量耦合的类轴子模型（axion-like model）给出了限制。