A search for the Zγ decay of the Higgs boson, with Z boson 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−1 recorded 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→Zγ is 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 2.0−0.9+1.0 where the statistical component of the uncertainty is dominant.
A search for the Zγ decay mode of the Higgs boson in pp collisions at s=13 TeV with the ATLAS detector / Aloisio, A., Alviggi, M., Canale, V., Della Pietra, M., Merola, L., Conventi, F., Rossi, E., Massarotti, P., De Asmundis, R., Cirotto, F., Lavorgna, M., Giannini, A., Di Donato, C., Iengo, P., Sekhniaidze, G., Izzo, V., Carlino, G., Doria, A., Loffredo, S.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 809:(2020), p. 135754. [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
ALOISIO ALBERTO;ALVIGGI MARIAGRAZIA;CANALE VINCENZO;DELLA PIETRA MASSIMO;MEROLA LEONARDO;ROSSI ELVIRA;MASSAROTTI PAOLO;DE ASMUNDIS Riccardo;CIROTTO FRANCESCO;LAVORGNA MARCO;GIANNINI ANTONIO;LOFFREDO, Salvatore
2020
Abstract
A search for the Zγ decay of the Higgs boson, with Z boson 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−1 recorded 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→Zγ is 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 2.0−0.9+1.0 where the statistical component of the uncertainty is dominant.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
