CERN Accelerating science

ATLAS Slides
Report number	ATL-PHYS-SLIDE-2024-236
Title	Higgs mass and width measurements at ATLAS
Author(s)	Nasella, Laura (Università degli Studi e INFN Milano (IT))
Corporate author(s)	The ATLAS collaboration
Collaboration	ATLAS Collaboration
Submitted to	PASCOS 2024, the 29th International Symposium on Particles, String and Cosmology, Quy Nhon, Vn, 7 - 13 Jul 2024
Submitted by	laura.nasella@cern.ch on 11 Jul 2024
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN LHC ; ATLAS
Free keywords	13 TeV ; Di-photon ; H(125) measurements ; Higgs ; Higgs to 2 photons ; Higgs to 4 lepton ; Higgs to WW ; Higgs to ZZ ; Mass measurement ; Off-shell Higgs ; Width measurement ; HIGGS
Abstract	This talk presents precise measurements of the Higgs boson mass and width, obtained using the full dataset collected in pp collisions at 13 TeV during Run 2 of the LHC. The mass measurements are performed exploiting the Higgs boson decays into two photons or four leptons, as well as their combination. The total width, too small to be measured directly at the LHC, can be extracted using the off-shell Higgs boson production process in the ZZ and WW final states, as well as through interference effects in the diphoton decay channel. The talk will describe the adopted analysis strategies, and it will stress the impact of the experimental techniques on these measurements.