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

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

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 languageEnglish
Article number135980
Pages (from-to)1-24
Number of pages24
JournalPhysics Letters B
Volume812
Early online date3 Dec 2020
DOIs
Publication statusPublished - 10 Jan 2021

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