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Title: Probing R-parity violating models of neutrino mass at the LHC via top squark decays

Abstract

We show that the R-parity violating decays of the lighter top squarks (t-tilde{sub 1}) triggered by the lepton number violating couplings {lambda}{sub i33}{sup '}, where the lepton family index i=1-3, can be observed at the LHC via the dilepton dijet channel even if the coupling is as small as 10{sup -4} or 10{sup -5}. This is the case in several models of neutrino mass, provided the t-tilde{sub 1} is the next lightest supersymmetric particle and the lightest neutralino is the lightest supersymmetric particle. First, we have obtained a fairly model-independent estimate of the minimum observable value of the parameter [P{sub ij}{identical_to}BR(t-tilde{yields}l{sub i}{sup +}b)xBR(t-tilde*{yields}l{sub j}{sup -}b)] at the LHC for an integrated luminosity of 10 fb{sup -1} as a function of m{sub t-tilde1} by a standard Pythia based analysis. We have then computed the parameter P{sub ij} in several representative models of neutrino mass constrained by the neutrino oscillation data and have found that the theoretical predictions are above the estimated minimum observable levels for a wide region of the parameter space.

Authors:
;  [1]
  1. Indian Institute of Science Education and Research, Kolkata, HC-VII, Sector III, Salt Lake City, Kolkata 700 106 (India)
Publication Date:
OSTI Identifier:
21308212
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 79; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.79.075021; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CERN LHC; COUPLING; FORECASTING; LEPTON NUMBER; LUMINOSITY; MASS; NEUTRINO OSCILLATION; NEUTRINOS; PARITY; PARTICLE DECAY; SPARTICLES; T QUARKS

Citation Formats

Datta, Amitava, and Poddar, Sujoy. Probing R-parity violating models of neutrino mass at the LHC via top squark decays. United States: N. p., 2009. Web. doi:10.1103/PHYSREVD.79.075021.
Datta, Amitava, & Poddar, Sujoy. Probing R-parity violating models of neutrino mass at the LHC via top squark decays. United States. https://doi.org/10.1103/PHYSREVD.79.075021
Datta, Amitava, and Poddar, Sujoy. Wed . "Probing R-parity violating models of neutrino mass at the LHC via top squark decays". United States. https://doi.org/10.1103/PHYSREVD.79.075021.
@article{osti_21308212,
title = {Probing R-parity violating models of neutrino mass at the LHC via top squark decays},
author = {Datta, Amitava and Poddar, Sujoy},
abstractNote = {We show that the R-parity violating decays of the lighter top squarks (t-tilde{sub 1}) triggered by the lepton number violating couplings {lambda}{sub i33}{sup '}, where the lepton family index i=1-3, can be observed at the LHC via the dilepton dijet channel even if the coupling is as small as 10{sup -4} or 10{sup -5}. This is the case in several models of neutrino mass, provided the t-tilde{sub 1} is the next lightest supersymmetric particle and the lightest neutralino is the lightest supersymmetric particle. First, we have obtained a fairly model-independent estimate of the minimum observable value of the parameter [P{sub ij}{identical_to}BR(t-tilde{yields}l{sub i}{sup +}b)xBR(t-tilde*{yields}l{sub j}{sup -}b)] at the LHC for an integrated luminosity of 10 fb{sup -1} as a function of m{sub t-tilde1} by a standard Pythia based analysis. We have then computed the parameter P{sub ij} in several representative models of neutrino mass constrained by the neutrino oscillation data and have found that the theoretical predictions are above the estimated minimum observable levels for a wide region of the parameter space.},
doi = {10.1103/PHYSREVD.79.075021},
url = {https://www.osti.gov/biblio/21308212}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 7,
volume = 79,
place = {United States},
year = {2009},
month = {4}
}