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Aug 27 – 31, 2021
南京大学(鼓楼校区)线上会议 Nanjing University (Gulou Campus) at ZOOM
Asia/Shanghai timezone

Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton--proton collisions at $\sqrt{s}$ = 13 TeV

Aug 30, 2021, 11:10 AM
20m
南京大学(鼓楼校区)线上会议 Nanjing University (Gulou Campus) at ZOOM

南京大学(鼓楼校区)线上会议 Nanjing University (Gulou Campus) at ZOOM

Speaker

Mr hanlin Xu (University of Science and Technology of China)

Description

A search for charged Higgs bosons decaying into $W^{\pm} W{^\pm}$ or $W^{\pm} Z$ bosons is performed, involving experimental signatures with two leptons of the same charge, or three or four leptons with a variety of charge combinations, missing transverse momentum and jets. A data sample of proton--proton collisions at a centre-of-mass energy of 13 TeV recorded with the ATLAS detector at the Large Hadron Collider between 2015 and 2018 is used. The data correspond to a total integrated luminosity of 139 $fb^{-1}$. The search is guided by a type-II seesaw model that extends the scalar sector of the Standard Model with a scalar triplet, leading to a phenomenology that includes doubly and singly charged Higgs bosons. Two scenarios are explored, corresponding to the pair production of doubly charged $H^{\pm\pm}$ bosons, or the associated production of a doubly charged $H^{\pm\pm}$ boson and a singly charged $H^\pm$ boson. No significant deviations from the Standard Model predictions are observed. $H^{\pm\pm}$ bosons are excluded at 95% confidence level up to 350 GeV and 230 GeV for the pair and associated production modes, respectively.

Primary authors

Prof. Yanwen Liu (USTC) Mr hanlin Xu (University of Science and Technology of China)

Presentation materials