This Letter presents a search for the production of new heavy resonances decaying into a Higgs boson and a photon using proton-proton collision data at s=13 TeV collected by the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 139 fb-1. The analysis is performed by reconstructing hadronically decaying Higgs boson (H→bb¯) candidates as single large-radius jets. A novel algorithm using information about the jet constituents in the center-of-mass frame of the jet is implemented to identify the two b quarks in the single jet. No significant excess of events is observed above the expected background. Upper limits are set on the production cross-section times branching fraction for narrow spin-1 resonances decaying into a Higgs boson and a photon in the resonance mass range from 0.7 to 4 TeV, cross-section times branching fractions are excluded between 11.6 fb and 0.11 fb at a 95% confidence level.
Search for Heavy Resonances Decaying into a Photon and a Hadronically Decaying Higgs Boson in pp Collisions at s =13 TeV with the ATLAS Detector / Aloisio, Alberto; Alviggi, Mariagrazia; Canale, Vincenzo; DELLA PIETRA, Massimo; Merola, Leonardo; Conventi, Francesco; Rossi, Elvira; Massarotti, Paolo; DE ASMUNDIS, Riccardo; Cirotto, Francesco; Lavorgna, Marco; Giannini, Antonio; DI DONATO, Camilla; Iengo, Paolo; Sekhniaidze, Givi; Izzo, Vincenzo; Carlino, Gianpaolo; Doria, Alessandra. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 125:25(2020), p. 251802. [10.1103/PhysRevLett.125.251802]
Search for Heavy Resonances Decaying into a Photon and a Hadronically Decaying Higgs Boson in pp Collisions at s =13 TeV with the ATLAS Detector
ALOISIO ALBERTO;ALVIGGI MARIAGRAZIA;CANALE VINCENZO;DELLA PIETRA MASSIMO;MEROLA LEONARDO;CONVENTI FRANCESCO;ROSSI ELVIRA;MASSAROTTI PAOLO;DE ASMUNDIS Riccardo;CIROTTO FRANCESCO;LAVORGNA MARCO;GIANNINI ANTONIO;
2020
Abstract
This Letter presents a search for the production of new heavy resonances decaying into a Higgs boson and a photon using proton-proton collision data at s=13 TeV collected by the ATLAS detector at the LHC. The data correspond to an integrated luminosity of 139 fb-1. The analysis is performed by reconstructing hadronically decaying Higgs boson (H→bb¯) candidates as single large-radius jets. A novel algorithm using information about the jet constituents in the center-of-mass frame of the jet is implemented to identify the two b quarks in the single jet. No significant excess of events is observed above the expected background. Upper limits are set on the production cross-section times branching fraction for narrow spin-1 resonances decaying into a Higgs boson and a photon in the resonance mass range from 0.7 to 4 TeV, cross-section times branching fractions are excluded between 11.6 fb and 0.11 fb at a 95% confidence level.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.