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.
Carratta, G., De Castro, S., Fabbri, L., Gabrielli, A., Rinaldi, L., Semprini Cesari, N., et al. (2021). A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector. PHYSICS LETTERS. SECTION B, 812, 1-24 [10.1016/j.physletb.2020.135980].
A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector
Carratta, G.;De Castro, S.;Fabbri, L.;Gabrielli, A.;Rinaldi, L.;Semprini Cesari, N.;Sioli, M.;Villa, M.;Zoccoli, A.;Bellagamba, L.;Boscherini, D.;Bruni, A.;Bruni, G.;Giacobbe, B.;Polini, A.;Sbarra, C.;Franchini, M.;Romano, M.;Valentinetti, S.;Alberghi, G. L.;Biondi, S.;Lasagni Manghi, F.;Massa, L.;Vittori, C.;Alfonsi, F.;Cabras, G.;Todome, K.;Fabbri, F.;
2021
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.| File | Dimensione | Formato | |
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