A search for the Zγdecay of the Higgs boson, with Zboson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at √s= 13 TeV corresponding to an integrated luminosity of 139 fb−1recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp →H→Zγis set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0+1.0−0.9where the statistical component of the uncertainty is dominant.
Aad G., A.B. (2020). A search for the Zγ decay mode of the Higgs boson in pp collisions at √s=13 TeV with the ATLAS detector. PHYSICS LETTERS. SECTION B, 809, 1-21 [10.1016/j.physletb.2020.135754].
A search for the Zγ decay mode of the Higgs boson in pp collisions at √s=13 TeV with the ATLAS detector
Alberghi G. L.;Alfonsi F.;Bellagamba L.;Bindi M.;Boscherini D.;Cabras G.;Caforio D.;Carratta G.;De Castro S.;Di Sipio R.;Fabbri F.;Fabbri L.;Franchini M.;Gabrielli A.;Giacobbe B.;Lasagni Manghi F.;Macchiolo A.;Massa L.;Monzani S.;Polini A.;Rinaldi L.;Romano M.;Sbarra C.;Sbrizzi A.;Semprini-Cesari N.;Sioli M.;Todome K.;Valentinetti S.;Villa M.;Vittori C.;Vivarelli I.;Zoccoli A.;
2020
Abstract
A search for the Zγdecay of the Higgs boson, with Zboson decays into pairs of electrons or muons is presented. The analysis uses proton–proton collision data at √s= 13 TeV corresponding to an integrated luminosity of 139 fb−1recorded by the ATLAS detector at the Large Hadron Collider. The observed data are consistent with the expected background with a p-value of 1.3%. An upper limit at 95% confidence level on the production cross-section times the branching ratio for pp →H→Zγis set at 3.6 times the Standard Model prediction while 2.6 times is expected in the presence of the Standard Model Higgs boson. The best-fit value for the signal yield normalised to the Standard Model prediction is 2.0+1.0−0.9where the statistical component of the uncertainty is dominant.File | Dimensione | Formato | |
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