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 2.0 σ (1.7 σ ). 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 |
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Article number | 135980 |
Number of pages | 24 |
Journal | Physics Letters B |
Volume | 812 |
Early online date | 3 Dec 2020 |
DOIs | |
Publication status | Published - 10 Jan 2021 |
Bibliographical note
Publisher Copyright:© 2020 The Author(s)
ASJC Scopus subject areas
- Nuclear and High Energy Physics