Mass measurement of the Higgs-like boson in ZZ((*)) -> 4l channel with the ATLAS detector

被引：0

作者：

Bruiscino, N. ^{[1
,2
]}

机构：

[1] Univ Naples Federico II, Naples, Italy

[2] INFN, Sez Napoli, Naples, Italy

来源：

NUOVO CIMENTO C-COLLOQUIA AND COMMUNICATIONS IN PHYSICS | 2014年 / 37卷 / 01期

关键词：

D O I：

10.1393/ncc/i2014-11705-7

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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) .

引用

页码：272 / 274

页数：3

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