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Measurement of the Higgs boson mass from the $H \rightarrow \gamma \gamma$ and $H \rightarrow ZZ^{\ast } \rightarrow 4\ell$ channels in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
Measurement of the Higgs boson mass from the $H \rightarrow \gamma \gamma$ and $H \rightarrow ZZ^{\ast } \rightarrow 4\ell$ channels in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
Measurement of the Higgs boson mass from the $H \rightarrow \gamma \gamma$ and $H \rightarrow ZZ^{\ast } \rightarrow 4\ell$ channels in pp collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
author:
Pałka Marek
contributor:
Współautorami artykułu są członkowie ATLAS Collaboration w liczbie 2888
institution:
ATLAS Collaboration
journal title:
Physical Review. D, Particles, Fields, Gravitation, and Cosmology
An improved measurement of the mass of the Higgs boson is derived from a combined fit to the reconstructed invariant mass spectra of the decay channels $H \rightarrow \gamma \gamma$ and $H \rightarrow ZZ^\ast \rightarrow 4 \ell$. The analysis uses the pp collision data sample recorded by the ATLAS experiment at the CERN Large Hadron Collider at center-of-mass energies of 7 TeV and 8 TeV, corresponding to an integrated luminosity of 25 fb$^{-1}$. The measured value of the Higgs boson mass is $m_{H}$ = 125.36 $\pm$ 37(stat) $\pm$ 0.18(syst) GeV. This result is based on improved energy-scale calibrations for photons, electrons, and muons as well as other analysis improvements, and supersedes the previous result from ATLAS. Upper limits on the total width of the Higgs boson are derived from fits to the invariant mass spectra of the $H \rightarrow \gamma \gamma$ and $H \rightarrow ZZ^\ast \rightarrow 4 \ell$ decay channels.
number of pulisher's sheets:
2,5
affiliation:
Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego