A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector

ATLAS Publications; T.M. Carter; M. Faucci Giannelli; M.P. Heath; S. Palazzo; A. Søgaard; E. Takeva; N. Themistokleous; E.M. Villhauer

doi:10.1016/j.physletb.2020.135980

A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector

ATLAS Publications
, T.M. Carter
, M. Faucci Giannelli
, M.P. Heath
, S. Palazzo
, A. Søgaard
, E. Takeva
, N. Themistokleous
, E.M. Villhauer

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

A search for the dimuon decay of the Standard Model (SM) Higgs boson is performed using data corresponding to an integrated luminosity of 139 fb−1 collected with the ATLAS detector in Run 2 pp collisions at √s = 13 TeV at the Large Hadron Collider. The observed (expected) significance over the
background-only hypothesis for a Higgs boson with a mass of 125.09 GeV is 2.0σ (1.7σ ). The observed upper limit on the cross section times branching ratio for pp → H → μμ is 2.2 times the SM prediction at 95% confidence level, while the expected limit on a H → μμ signal assuming the absence (presence)
of a SM signal is 1.1 (2.0). The best-fit value of the signal strength parameter, defined as the ratio of the observed signal yield to the one expected in the SM, is μ = 1.2 ± 0.6.

Original language	English
Article number	135980
Pages (from-to)	1-24
Number of pages	24
Journal	Physics Letters B
Volume	812
Early online date	3 Dec 2020
DOIs	https://doi.org/10.1016/j.physletb.2020.135980
Publication status	Published - 10 Jan 2021

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http://arxiv.org/abs/2007.07830

Upgrade of the ATLAS detector at the LHC (2023-26)
Clark, P. (Principal Investigator)
1/04/23 → 31/03/26
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/04/23 → 30/09/25
Project: Research
Experimental Particle Physics at the University of Edinburgh
Leonidopoulos, C. (Principal Investigator)
1/10/22 → 30/09/25
Project: Research

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title = "A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector",

abstract = "A search for the dimuon decay of the Standard Model (SM) Higgs boson is performed using data corresponding to an integrated luminosity of 139 fb−1 collected with the ATLAS detector in Run 2 pp collisions at √s = 13 TeV at the Large Hadron Collider. The observed (expected) significance over the background-only hypothesis for a Higgs boson with a mass of 125.09 GeV is 2.0σ (1.7σ ). The observed upper limit on the cross section times branching ratio for pp → H → μμ is 2.2 times the SM prediction at 95\% confidence level, while the expected limit on a H → μμ signal assuming the absence (presence) of a SM signal is 1.1 (2.0). The best-fit value of the signal strength parameter, defined as the ratio of the observed signal yield to the one expected in the SM, is μ = 1.2 ± 0.6.",

author = "\{ATLAS Publications\} and Clark, \{Philip James\} and Sinead Farrington and Yanyan Gao and Christos Leonidopoulos and Martin, \{Victoria Jane\} and Liza Mijovic and Benjamin Wynne and T.M. Carter and \{Faucci Giannelli\}, M. and M.P. Heath and S. Palazzo and A. S{\o}gaard and E. Takeva and N. Themistokleous and E.M. Villhauer",

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T1 - A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector

AU - ATLAS Publications

AU - Clark, Philip James

AU - Farrington, Sinead

AU - Gao, Yanyan

AU - Leonidopoulos, Christos

AU - Martin, Victoria Jane

AU - Mijovic, Liza

AU - Wynne, Benjamin

AU - Carter, T.M.

AU - Faucci Giannelli, M.

AU - Heath, M.P.

AU - Palazzo, S.

AU - Søgaard, A.

AU - Takeva, E.

AU - Themistokleous, N.

AU - Villhauer, E.M.

PY - 2021/1/10

Y1 - 2021/1/10

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AB - A search for the dimuon decay of the Standard Model (SM) Higgs boson is performed using data corresponding to an integrated luminosity of 139 fb−1 collected with the ATLAS detector in Run 2 pp collisions at √s = 13 TeV at the Large Hadron Collider. The observed (expected) significance over the background-only hypothesis for a Higgs boson with a mass of 125.09 GeV is 2.0σ (1.7σ ). The observed upper limit on the cross section times branching ratio for pp → H → μμ is 2.2 times the SM prediction at 95% confidence level, while the expected limit on a H → μμ signal assuming the absence (presence) of a SM signal is 1.1 (2.0). The best-fit value of the signal strength parameter, defined as the ratio of the observed signal yield to the one expected in the SM, is μ = 1.2 ± 0.6.

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DO - 10.1016/j.physletb.2020.135980

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SN - 0370-2693

VL - 812

SP - 1

EP - 24

JO - Physics Letters B

JF - Physics Letters B

M1 - 135980

ER -

A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector

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Projects

Upgrade of the ATLAS detector at the LHC (2023-26)

Experimental Particle Physics at the University of Edinburgh

Experimental Particle Physics at the University of Edinburgh

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