# 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 »

- Authors:

- 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}

}