Probing neutrino mass with displaced vertices at the Fermilab Tevatron

Journal Article · Fri Apr 01 04:00:00 EST 2005 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PhysRevD.71.075001· OSTI ID:20709000

Campos, F de ^[1]; Eboli, O J.P.; Magro, M B ^[2]; Porod, W ^[3]; Restrepo, D ^[3]; Valle, J W.F. ^[3]

---

1. Departamento de Fisica e Quimica, Universidade Estadual Paulista, Guaratingueta-SP (Brazil)
2. Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo-SP (Brazil)
3. Instituto de Fisica Corpuscular, C.S.I.C./Universitat de Valencia, Edificio Institutos de Paterna, Apartado 22085, E-46071 Valencia (Spain)

Supersymmetric extensions of the standard model exhibiting bilinear R-parity violation can generate naturally the observed neutrino mass spectrum as well as mixings. One interesting feature of these scenarios is that the lightest supersymmetric particle (LSP) is unstable, with several of its decay properties predicted in terms of neutrino mixing angles. A smoking gun of this model in colliders is the presence of displaced vertices due to LSP decays in large parts of the parameter space. In this work we focus on the simplest model of this type that comes from minimal supergravity with universal R-parity conserving soft breaking of supersymmetry augmented with bilinear R-parity breaking terms at the electroweak scale (RmSUGRA). We evaluate the potential of the Fermilab Tevatron to probe the RmSUGRA parameters through the analysis of events possessing two displaced vertices stemming from LSP decays. We show that requiring two displaced vertices in the events leads to a reach in m{sub 1/2} twice the one in the usual multilepton signals in a large fraction of the parameter space.

• OSTI ID: 20709000
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 71; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CONSERVATION LAWS
FERMILAB TEVATRON
MASS SPECTRA
NEUTRINOS
PARITY
PARTICLE DECAY
POTENTIALS
PROTON-PROTON INTERACTIONS
REST MASS
SPARTICLES
STANDARD MODEL
SUPERGRAVITY
SUPERSYMMETRY
SYMMETRY BREAKING
WEINBERG ANGLE