Bruscino, N. (2014) Mass measurement of the Higgs-like boson in ZZ((*)) -> 4l channel with the ATLAS detector. Il nuovo cimento C, 37 (1). pp. 272-274. ISSN 1826-9885
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Abstract
The measurement of the mass of the observed Higgs-like boson in the decay channel H -> ZZ((*)) -> l(+)l(-)l('+)l('-) is presented. Proton-proton collision data recorded by the ATLAS detector at the LHC, corresponding to an integrated luminosity of similar to 25 fb(-1), have been used. A clear excess of events over the background is observed at mH = 124.3 GeV with a significance of 6.6 s in ZZ((*)) -> 4l analysis, corresponding to a background fluctuation probability of 2.7x10(-11). The mass of the Higgs-like boson is measured to be mH = 124.3 (+0.6)(-0.5) (stat) (+0.5)(-0.3) (syst) GeV, and the signal strength (the ratio of the observed cross section to the expected SM cross section) at this mass is found to be mu = 1.7 (+0.5)(-0.3) .
| Item Type: | Article |
|---|---|
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 12 May 2020 15:38 |
| Last Modified: | 12 May 2020 15:38 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/18515 |
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