Compact Muon Solenoid
LHC, CERN
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| CMS-PAS-EXO-14-014 | ||
| Search for heavy Majorana neutrinos in $ \mathrm{ e^{\pm} e^{\pm} } $ + jets and $ \mathrm{ e^{\pm} \mu^{\pm} } $ + jets events in proton-proton collisions at $ \sqrt{s} =$ 8 TeV | ||
| CMS Collaboration | ||
| September 2015 | ||
| Abstract: We report a search for heavy Majorana neutrinos (N) decaying into a W boson and a lepton using the CMS detector at the Large Hadron Collider. We search for a signature of two same-sign electrons and two jets or a same-sign electron-muon pair and two jets using 19.7 fb$^{-1}$ of data collected during 2012 in proton-proton collisions at a center-of-mass energy of 8 TeV. We find the data to be consistent with the expected standard model background and upper limits are set on $ | V_{\ell \mathrm{N}} |^2 $, as a function of Majorana neutrino mass from 40-500 GeV/$c^2$, where $V_{\ell \mathrm{N}}$ is the mixing element of the heavy neutrino with the standard model neutrino. The upper limits obtained for $ | V_{e \mathrm{N}} |^2 $ ($ | V_{e \mathrm{N}} V_{\mu \mathrm{N}}^* | $) are 0.022 (0.009) for $ m_\mathrm{N} =$ 90 GeV/$c^2$, 0.016 (0.009) for $m_\mathrm{N} =$ 200 GeV/$c^2$, and 0.72 (0.47) for $m_\mathrm{N} =$ 500 GeV/$c^2$. These results extend considerably the regions excluded by previous direct searches. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
Public twiki page ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 04 (2016) 169. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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