Updated measurements of Higgs boson production in the diphoton decay channel at $\sqrt{s}=13~\textrm{TeV}$ in pp collisions at CMS.

Updated measurements of Higgs boson production in the diphoton decay channel at $\sqrt{s}=13~\textrm{TeV}$ in pp collisions at CMS.

CMS

Collaboration

2016

42 pages

Report number:

CMS-PAS-HIG-16-020

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

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Abstract:

An observation of the Higgs boson production for the two photon decay channel with the 2016 LHC

\textrm{Run}~2

data is described. The analysis is performed using the dataset recorded by the CMS experiment at the LHC from pp collisions at centre-of-mass energy of

13~\textrm{TeV}

corresponding to an integrated luminosity of

12.9~\textrm{fb}^{-1}

. The observed significance for the standard model Higgs boson at the Run 1 ATLAS+CMS combined

m_{H} = 125.09~\mathrm{GeV}

is

5.6~\sigma

, where

6.2~\sigma

is expected. A maximum significance of

6.1~\sigma

is observed at

126.0~\mathrm{GeV}

. The best-fit signal strength relative to the standard model prediction is

0.95 \pm 0.20 = 0.95 \pm 0.17 \text{~(stat.)~}^{+0.10}_{-0.07} \text{~(syst.)~}^{+0.08}_{-0.05} \text{~(theo.)}

when the mass parameter is profiled in the fit, and

0.91 \pm 0.20 = 0.91 \pm 0.17 \text{~(stat.)~} ^{+0.09}_{-0.07} \text{~(syst.)~} ^{+0.08}_{-0.05} \text{~(theo.)}

when it is fixed to

m_{H} = 125.09~\mathrm{GeV}

. The fiducial cross section is measured to be

\hat{\sigma}_{fid} = 69^{+18}_{-22}~\text{fb} = 69^{+16}_{-22} (\text{stat.})^{+8}_{-6} (\text{syst.})~\text{fb}

, where the standard model theoretical prediction is

73.8 \pm 3.8~\mathrm{fb}

.

Note:

Preliminary results

Data
p p: colliding beams
Higgs particle: hadroproduction
p p: scattering
cross section: measured
photon: pair production
CMS
CERN LHC Coll
Higgs particle: radiative decay
mass spectrum: two-photon

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