# Standard Model at the LHC 2022

Apr 11 – 14, 2022
CERN
Europe/Zurich timezone

## A search for the dimuon decay of the Standard Model Higgs boson in pp collisions at 13 TeV with the ATLAS Detector

Apr 12, 2022, 6:35 PM
8m
500/1-001 - Main Auditorium (CERN)

### 500/1-001 - Main Auditorium

#### CERN

400
Show room on map
Young Scientists Forum (YSF)

### Speakers

Ye Chen (University of Science and Technology of China (CN)) Ye Chen (Hefei University of Science and Technology of China)

### Description

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 collected with the ATLAS detector in Run2 pp collisions at 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 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.

### Primary authors

Ye Chen (University of Science and Technology of China (CN)) Ye Chen (Hefei University of Science and Technology of China)