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

Journal Article · Wed Apr 01 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.075021· OSTI ID:21308212

Datta, Amitava; Poddar, Sujoy ^[1]

---

1. Indian Institute of Science Education and Research, Kolkata, HC-VII, Sector III, Salt Lake City, Kolkata 700 106 (India)

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.

• OSTI ID: 21308212
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CERN LHC
COUPLING
FORECASTING
LEPTON NUMBER
LUMINOSITY
MASS
NEUTRINO OSCILLATION
NEUTRINOS
PARITY
PARTICLE DECAY
SPARTICLES
T QUARKS