Compact Muon Solenoid
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| CMS-PAS-HIG-14-002 | ||
| Constraints on the Higgs boson width from off-shell production and decay to ZZ to llll and llvv | ||
| CMS Collaboration | ||
| 2014 | ||
| Abstract: We constrain the total Higgs boson width, $\Gamma_{\mathrm{H}}$, using off-shellproduction and decay to four leptons, \ell$, or two leptons plus two neutrinos, \ell 2\nu$, with $\ell = \mathrm{e},\mu$. The analysis is based on the data collected in 2012 by the CMS experiment at the LHC, corresponding to an integrated luminosity ${\cal L} = 19.7 \mathrm{fb^{-1}}$ at a center-of-mass energy $\surd s = 8 \, {\rm TeV}$. The \ell$ analysis uses the ZZ invariant mass distribution as well as a matrix element likelihood discriminant to separate the ZZ components originating from gluon- and quark-initiated processes. The \ell 2\nu$ analysis relies on the transverse mass or missing transverse energy distributions in jet categories. An unbinned maximum-likelihood fit of the above distributions, combined with the \ell$ measurement near the resonance peak, leads to an upper limit on the Higgs boson width of $\Gamma_{\mathrm{H}} < 4.2 \times \Gamma_{\mathrm{H}}^{\mathrm{SM}}$ at the 95\% confidence level, assuming $\Gamma_{\mathrm{H}}^{\mathrm{SM}} = 4.15 \, {\rm MeV}$. This result considerably improves over previous experimental constraints from the measurement near the resonance peak. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
Public twiki page ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, PLB 736 (2014) 64. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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