Measurements of properties of the Higgs boson and search for an additional resonance in the four-lepton final state at sqrt(s) = 13 TeV

Measurements of properties of the Higgs boson and search for an additional resonance in the four-lepton final state at sqrt(s) = 13 TeV

CMS

Collaboration

2016

36 pages

Report number:

CMS-PAS-HIG-16-033

Experiments:

CERN-LHC-CMS

View in:

CERN Document Server

pdf

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Abstract:

Studies of Higgs boson properties are presented using the

{\rm H}\rightarrow{\rm Z}{\rm Z}\rightarrow4\ell

(

\ell={\rm e},\mu

) decay channel. These studies are performed using a data sample corresponding to an integrated luminosity of

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

of pp collisions at a center-of-mass energy of

13~{\rm TeV}

collected by the CMS experiment at the LHC during 2016. The observed significance for the standard model Higgs boson with

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

is

6.2\sigma

, where the expected significance is

6.5\sigma

. The signal strength modifier

\mu

, defined as the production cross section of the Higgs boson times its branching fraction to four leptons relative to the standard model expectation, is measured to be

\mu=0.99^{+0.33}_{-0.26}

at

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

. The signal-strength modifiers for the main Higgs boson production modes have also been constrained. The model independent fiducial cross section is measured to be

2.29^{+0.74}_{-0.64}({\rm stat.})^{+0.30}_{-0.23}({\rm sys.})^{+0.01}_{-0.05}({\rm model~dep.})~{\rm fb}

and differential cross sections as a function of the

p_{\rm T}

of the Higgs boson and the number of associated jets are determined. The mass is measured to be

m_{{\rm H}}=124.50^{+0.48}_{-0.46}~{\rm GeV}

and the width is constrained to be

\Gamma_{{\rm H}}<41~{\rm MeV}

. The anomalous effects in the Higgs interactions with a pair of Z bosons are constrained under the assumption of a spin-zero resonance. Finally, a search for an additional resonance decaying to ZZ is performed for a range of masses up to 2.5 TeV and with various widths and no significant excess is observed.

Note:

Preliminary results

Data
p p: colliding beams
Higgs particle: hadroproduction
Z0: pair production
Z0: leptonic decay
cross section: measured
Higgs particle: mass: measured
Higgs particle: width
Higgs particle: spin
p p: scattering

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