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Title: Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders

Abstract

We assess the sensitivity of the LHC, its high energy upgrade, and a prospective 100 TeV hadronic collider to the Dirac Yukawa coupling of the heavy neutrinos in left-right symmetric models (LRSMs). We focus specifically on the trilepton final state in regions of parameter space yielding prompt decays of the right-handed gauge bosons (WR) and neutrinos (NR). In the minimal LRSM, the Dirac Yukawa couplings are completely fixed in terms of the mass matrices for the heavy and light neutrinos. In this case, the trilepton signal provides a direct probe of the Dirac mass term for a fixed WR and NR mass. We find that while it is possible to discover the WR at the LHC, probing the Dirac Yukawa couplings will require a 100 TeV pp collider. We also show that the observation of the trilepton signal at the LHC would indicate the presence of a nonminimal LRSM scenario.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Univ. of Massachusetts, Amherst, MA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1503383
Alternate Identifier(s):
OSTI ID: 1611596
Grant/Contract Number:  
SC0011095
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 99 Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Astronomy & Astrophysics; Physics; Extensions of Higgs sector; Extensions of fermion sector; Extensions of gauge sector; Particle decays; Particle production

Citation Formats

Helo, Juan Carlos, Li, Haolin, Neill, Nicolás A., Ramsey-Musolf, Michael, and Vasquez, Juan Carlos. Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders. United States: N. p., 2019. Web. doi:10.1103/PhysRevD.99.055042.
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Helo, Juan Carlos, Li, Haolin, Neill, Nicolás A., Ramsey-Musolf, Michael, & Vasquez, Juan Carlos. Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders. United States. https://doi.org/10.1103/PhysRevD.99.055042
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Helo, Juan Carlos, Li, Haolin, Neill, Nicolás A., Ramsey-Musolf, Michael, and Vasquez, Juan Carlos. Wed . "Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders". United States. https://doi.org/10.1103/PhysRevD.99.055042.
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@article{osti_1503383,
title = {Probing neutrino Dirac mass in left-right symmetric models at the LHC and next generation colliders},
author = {Helo, Juan Carlos and Li, Haolin and Neill, Nicolás A. and Ramsey-Musolf, Michael and Vasquez, Juan Carlos},
abstractNote = {We assess the sensitivity of the LHC, its high energy upgrade, and a prospective 100 TeV hadronic collider to the Dirac Yukawa coupling of the heavy neutrinos in left-right symmetric models (LRSMs). We focus specifically on the trilepton final state in regions of parameter space yielding prompt decays of the right-handed gauge bosons (WR) and neutrinos (NR). In the minimal LRSM, the Dirac Yukawa couplings are completely fixed in terms of the mass matrices for the heavy and light neutrinos. In this case, the trilepton signal provides a direct probe of the Dirac mass term for a fixed WR and NR mass. We find that while it is possible to discover the WR at the LHC, probing the Dirac Yukawa couplings will require a 100 TeV pp collider. We also show that the observation of the trilepton signal at the LHC would indicate the presence of a nonminimal LRSM scenario.},
doi = {10.1103/PhysRevD.99.055042},
journal = {Physical Review D},
number = 5,
volume = 99,
place = {United States},
year = {Wed Mar 27 00:00:00 EDT 2019},
month = {Wed Mar 27 00:00:00 EDT 2019}
}
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https://doi.org/10.1103/PhysRevD.99.055042
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