Search for third-generation scalar leptoquarks and heavy right-handed neutrinos in final states with two tau leptons and two jets in proton-proton collisions at √s=13 TeV
A search is performed for third-generation scalar leptoquarks and heavy righthanded neutrinos in events containing one electron or muon, one hadronically decaying τ lepton, and at least two jets, using a √ s = 13 TeV pp collision data sample corresponding to an integrated luminosity of 12.9 fb-1...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English |
| Published: |
Springer Verlag
2017
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/63126/1/63126_Search%20for%20third-generation%20scalar_article.pdf http://irep.iium.edu.my/63126/2/63126_Search%20for%20third-generation%20scalar_scopus.pdf http://irep.iium.edu.my/63126/ https://link.springer.com/content/pdf/10.1007%2FJHEP07%282017%29121.pdf |
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| Summary: | A search is performed for third-generation scalar leptoquarks and heavy righthanded neutrinos in events containing one electron or muon, one hadronically decaying τ
lepton, and at least two jets, using a √
s = 13 TeV pp collision data sample corresponding
to an integrated luminosity of 12.9 fb-1 collected with the CMS detector at the LHC in
2016. The number of observed events is found to be in agreement with the standard model
prediction. A limit is set at 95% confidence level on the product of the leptoquark pair
production cross section and β
2
, where β is the branching fraction of leptoquark decay
to a τ lepton and a bottom quark. Assuming β = 1, third-generation leptoquarks with
masses below 850 GeV are excluded at 95% confidence level. An additional search based
on the same event topology involves heavy right-handed neutrinos, NR, and right-handed
W bosons, WR, arising in a left-right symmetric extension of the standard model. In this
search, WR bosons are assumed to decay to a tau lepton and NR followed by the decay of
the NR to a tau lepton and an off-shell WR boson. Assuming the mass of the right-handed
neutrino to be half of the mass of the right-handed W boson, WR boson masses below
2.9 TeV are excluded at 95% confidence level. These results improve on the limits from
previous searches for third-generation leptoquarks and heavy right-handed neutrinos with
τ leptons in the final state. |
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