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Title: New signals of an R-parity violating model of neutrino mass at the Fermilab Tevatron

Abstract

In a variety of models of neutrino masses and mixings the lighter top squark decays into competing R-parity violating and R-parity conserving channels. Using PYTHIA we have estimated in a model independent way the minimum value of P{identical_to}BR(t-tilde){sub 1}{yields}c{chi}-tilde{sub 1}{sup 0})xBR(t-tilde){sub 1}{yields}l{sub i}{sup +}b), where l{sub i}=e{sup +} and {mu}{sup +}, corresponding to an observable signal involving the final state 1l+jets+Ee{sub T} (carried by the neutrinos from the {chi}-tilde{sub 1}{sup 0} decay) at Tevatron Run II. For the kinematical cuts designed in this paper P depends on m{sub t-tilde{sub 1}} only. We then compute P for representative choices of the model parameters constrained by the oscillation data and find that over a significant region of the allowed parameter space P is indeed larger than P{sub min}. This signal is complementary to the dilepton+dijet signal studied in several earlier experimental and phenomenological analyses and may be observed even if BR(t-tilde){sub 1}{yields}l{sub i}{sup +}b) is an order of magnitude smaller than BR(t-tilde{sub 1}{yields}c{chi}-tilde{sub 1}{sup 0}). The invariant mass distribution of the hardest lepton and the hardest jet may determine m{sub t-tilde{sub 1}} and reveal the lepton number violating nature of the underlying interaction. The invariant mass distribution of the two lowest energymore » jets may determine m{sub {chi}}{sub -tilde{sub 1}{sup 0}}.« less

Authors:
;  [1]
  1. Department of Physics, Jadavpur University, Kolkata- 700 032 (India)
Publication Date:
OSTI Identifier:
21020307
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. D, Particles Fields; Journal Volume: 75; Journal Issue: 7; Other Information: DOI: 10.1103/PhysRevD.75.075013; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; CONSERVATION LAWS; FERMILAB TEVATRON; JET MODEL; LEPTON NUMBER; MASS DISTRIBUTION; MUONS PLUS; NEUTRINO OSCILLATION; NEUTRINOS; PARITY; PARTICLE DECAY; POSITRONS; PROTON-PROTON INTERACTIONS; REST MASS; SPARTICLES; SYMMETRY

Citation Formats

Datta, Amitava, and Poddar, Sujoy. New signals of an R-parity violating model of neutrino mass at the Fermilab Tevatron. United States: N. p., 2007. Web. doi:10.1103/PHYSREVD.75.075013.
Datta, Amitava, & Poddar, Sujoy. New signals of an R-parity violating model of neutrino mass at the Fermilab Tevatron. United States. doi:10.1103/PHYSREVD.75.075013.
Datta, Amitava, and Poddar, Sujoy. Sun . "New signals of an R-parity violating model of neutrino mass at the Fermilab Tevatron". United States. doi:10.1103/PHYSREVD.75.075013.
@article{osti_21020307,
title = {New signals of an R-parity violating model of neutrino mass at the Fermilab Tevatron},
author = {Datta, Amitava and Poddar, Sujoy},
abstractNote = {In a variety of models of neutrino masses and mixings the lighter top squark decays into competing R-parity violating and R-parity conserving channels. Using PYTHIA we have estimated in a model independent way the minimum value of P{identical_to}BR(t-tilde){sub 1}{yields}c{chi}-tilde{sub 1}{sup 0})xBR(t-tilde){sub 1}{yields}l{sub i}{sup +}b), where l{sub i}=e{sup +} and {mu}{sup +}, corresponding to an observable signal involving the final state 1l+jets+Ee{sub T} (carried by the neutrinos from the {chi}-tilde{sub 1}{sup 0} decay) at Tevatron Run II. For the kinematical cuts designed in this paper P depends on m{sub t-tilde{sub 1}} only. We then compute P for representative choices of the model parameters constrained by the oscillation data and find that over a significant region of the allowed parameter space P is indeed larger than P{sub min}. This signal is complementary to the dilepton+dijet signal studied in several earlier experimental and phenomenological analyses and may be observed even if BR(t-tilde){sub 1}{yields}l{sub i}{sup +}b) is an order of magnitude smaller than BR(t-tilde{sub 1}{yields}c{chi}-tilde{sub 1}{sup 0}). The invariant mass distribution of the hardest lepton and the hardest jet may determine m{sub t-tilde{sub 1}} and reveal the lepton number violating nature of the underlying interaction. The invariant mass distribution of the two lowest energy jets may determine m{sub {chi}}{sub -tilde{sub 1}{sup 0}}.},
doi = {10.1103/PHYSREVD.75.075013},
journal = {Physical Review. D, Particles Fields},
number = 7,
volume = 75,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}