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EnglishA 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.
| Titolo: | A search for the dimuon decay of the Standard Model Higgs boson with the ATLAS detector | |
| Autore/i: | 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.; Sidoti , A.; Franchini , M.; Romano , M.; Valentinetti , S.; Alberghi , G. L.; Biondi , S.; Lasagni Manghi , F; Massa , L.; Vittori , C.; Alfonsi , F:; Cabras , G.; Cervelli , A.; Negrini , M.; Todome , K.; ATLAS collaboration | |
| Autore/i Unibo: | ||
| Anno: | 2021 | |
| Rivista: | ||
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1016/j.physletb.2020.135980 | |
| 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. | |
| Data stato definitivo: | 2021-01-25T16:03:26Z | |
| Appare nelle tipologie: | 1.01 Articolo in rivista |
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