Search for a new scalar decaying into new spin-1 bosons in four-lepton final states with the ATLAS detector

IF 4.3 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
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引用次数: 0

Abstract

A search is conducted for a new scalar boson S, with a mass distinct from that of the Higgs boson, decaying promptly into four leptons (=e, μ) via an intermediate state containing two on-shell, promptly decaying new spin-1 bosons Zd: SZdZd4, where the Zd boson has a mass between 15 and 300 GeV, and the S boson has a mass between either 30 and 115 GeV or 130 and 800 GeV. The search uses proton–proton collision data collected with the ATLAS detector at the Large Hadron Collider with an integrated luminosity of 139 fb−1 at a centre-of-mass energy of s=13 TeV. No significant excess above the Standard Model background expectation is observed. Upper limits at 95% confidence level are set on the production cross-section times branching ratio, σ(ggS)×B(SZdZd4), as a function of the mass of both particles, mS and mZd.
利用 ATLAS 探测器搜索在四轻子终态中衰变为新自旋-1 玻色子的新标量
寻找一种新的标量玻色子S,它的质量与希格斯玻色子不同,通过包含两个上壳态的中间态迅速衰变为四个轻子(r =e, μ),迅速衰变的自旋为1的新玻色子Zd: S→ZdZd→4r,其中Zd玻色子的质量在15 ~ 300 GeV之间,S玻色子的质量在30 ~ 115 GeV之间或130 ~ 800 GeV之间。研究使用了大型强子对撞机上ATLAS探测器收集的质子-质子碰撞数据,其综合光度为139 fb−1,质心能量为s=13 TeV。没有观察到明显超出标准模型背景期望。在95%置信水平上,生成截面乘以分支比σ(gg→S)×B(S→ZdZd→4r)是两个粒子质量mS和mZd的函数。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Physics Letters B
Physics Letters B 物理-物理:综合
CiteScore
9.10
自引率
6.80%
发文量
647
审稿时长
3 months
期刊介绍: Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.
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