Coannihilation with a chargino and gauge boson pair production at one-loop

Journal Article · Wed Feb 10 04:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3327540· OSTI ID:21349506

Baro, N ^[1]; Chalons, G; Hao, Sun ^[2]

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1. Institut fuer Theoretische Physik E, RWTH Aachen University, D-52074 Aachen (Germany)
2. LAPTH, Universite de Savoie, CNRS, BP 110, F-74941 Annecy-le-Vieux Cedex (France)

We present a complete calculation of the electroweak one-loop corrections to the relic density within the MSSM framework. In the context of the neutralino as dark matter candidate, we review different scenarios of annihilation and coannihilation with a chargino. In particular we investigate predictions for the annihilation into gauge boson pairs for different kinds of neutralino: bino-, wino- and higgsino-like. We present some interesting effects which are not present at tree-level and show up at one-loop. To deal with the large number of diagrams occurring in the calculations, we have developed an automatic tool for the computation at one-loop of any process in the MSSM. We have implemented a complete on-shell gauge invariant renormalization scheme, with the possibility of switching to other schemes. We emphasize the variations due to the choice of the renormalization scheme, in particular the one-loop definition of the parameter tan beta.

• OSTI ID: 21349506
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1200; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
BASIC INTERACTIONS
BOSONS
CALCULATION METHODS
CORRECTIONS
DIAGRAMS
DOCUMENT TYPES
ELEMENTARY PARTICLES
FEYNMAN DIAGRAM
FIELD THEORIES
GAUGE INVARIANCE
GRAND UNIFIED THEORY
INFORMATION
INTERACTIONS
INVARIANCE PRINCIPLES
MATHEMATICAL MODELS
MATTER
NONLUMINOUS MATTER
PAIR PRODUCTION
PARTICLE INTERACTIONS
PARTICLE MODELS
PARTICLE PRODUCTION
POSTULATED PARTICLES
QUANTUM FIELD THEORY
RENORMALIZATION
REVIEWS
SPARTICLES
STANDARD MODEL
SUPERSYMMETRY
SYMMETRY
UNIFIED GAUGE MODELS
VARIATIONS
WEAK INTERACTIONS