Search for heavy majorana neutrinos in same-sign dilepton channels in proton-proton collisions at √s = 13 TeV
A search is performed for a heavy Majorana neutrino (N), produced in leptonic decay of a W boson propagator and decaying into a W boson and a lepton, with the CMS detector at the LHC. The signature used in this search consists of two same-sign leptons, in any flavor combination of electrons and m...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
Springer Verlag
2019
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/71625/1/71625_Search%20for%20heavy%20Majorana%20neutrinos_article.pdf http://irep.iium.edu.my/71625/2/71625_Search%20for%20heavy%20Majorana%20neutrinos_wos.pdf http://irep.iium.edu.my/71625/3/71625_Search%20for%20heavy%20Majorana%20neutrinos_scopus.pdf http://irep.iium.edu.my/71625/ https://link.springer.com/content/pdf/10.1007%2FJHEP01%282019%29122.pdf |
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| Summary: | A search is performed for a heavy Majorana neutrino (N), produced in leptonic
decay of a W boson propagator and decaying into a W boson and a lepton, with the CMS
detector at the LHC. The signature used in this search consists of two same-sign leptons, in
any flavor combination of electrons and muons, and at least one jet. The data were collected
during 2016 in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding
to an integrated luminosity of 35.9 fb−1
. The results are found to be consistent with the
expected standard model background. Upper limits are set in the mass range between
20 and 1600 GeV in the context of a Type-I seesaw mechanism, on |VeN|
2
, |VµN|
2
, and
|VeNV
∗
µN |
2/(|VeN|
2 + |VµN|
2
), where V`N is the matrix element describing the mixing of
N with the standard model neutrino of flavor ` = e, µ. For N masses between 20 and
1600 GeV, the upper limits on |V`N|
2
range between 2.3 × 10−5 and unity. These are the
most restrictive direct limits for heavy Majorana neutrino masses above 430 GeV. |
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