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) .
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页码：272 / 274
页数：3
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