Constraints on models of scalar and vector leptoquarks decaying to a quark and a neutrino at s =13 TeV
The results of a previous search by the CMS Collaboration for squarks and gluinos are reinterpreted to constrain models of leptoquark (LQ) production. The search considers jets in association with a transverse momentum imbalance, using the MT2 variable. The analysis uses proton-proton collision da...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English English English |
| Published: |
American Physical Society
2018
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/69798/ http://irep.iium.edu.my/69798/ http://irep.iium.edu.my/69798/ http://irep.iium.edu.my/69798/1/69798_Constraints%20on%20models%20of%20scalar%20and%20vector_article.pdf http://irep.iium.edu.my/69798/2/69798_Constraints%20on%20models%20of%20scalar%20and%20vector_scopus.pdf http://irep.iium.edu.my/69798/13/69798_Constraints%20on%20models%20of%20scalar%20and%20vector%20leptoquarks%20decaying%20to%20a%20quark%20and%20a%20neutrino%20at%20s%20%3D13%20TeV_WOS.pdf |
| Summary: | The results of a previous search by the CMS Collaboration for squarks and gluinos are reinterpreted to
constrain models of leptoquark (LQ) production. The search considers jets in association with a transverse
momentum imbalance, using the MT2 variable. The analysis uses proton-proton collision data at ffiffi
s p ¼ 13 TeV, recorded with the CMS detector at the LHC in 2016 and corresponding to an integrated
luminosity of 35.9 fb−1. Leptoquark pair production is considered with LQ decays to a neutrino and a top,
bottom, or light quark. This reinterpretation considers higher mass values than the original CMS search to
constrain both scalar and vector LQs. Limits on the cross section for LQ pair production are derived at the
95% confidence level depending on the LQ decay mode. A vector LQ decaying with a 50% branching
fraction to tν, and 50% to bτ, has been proposed as part of an explanation of anomalous flavor physics
results. In such a model, using only the decays to tν, LQ masses below 1530 GeV are excluded assuming
the Yang-Mills case with coupling κ ¼ 1, or 1115 GeV in the minimal coupling case κ ¼ 0, placing the
most stringent constraint to date from pair production of vector LQs. |
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