Coannihilation with a chargino and gauge boson pair production at one-loop - High Energy Physics - PhenomenologyReportar como inadecuado




Coannihilation with a chargino and gauge boson pair production at one-loop - High Energy Physics - Phenomenology - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: We present a complete calculation of the electroweak one-loop corrections tothe relic density within the MSSM framework. In the context of the neutralinoas dark matter candidate, we review different scenarios of annihilation andcoannihilation with a chargino. In particular we investigate predictions forthe annihilation into gauge boson pairs for different kinds of neutralino:bino-, wino- and higgsino-like. We present some interesting effects which arenot present at tree-level and show up at one-loop. To deal with the largenumber of diagrams occuring in the calculations, we have developed an automatictool for the computation at one-loop of any process in the MSSM. We haveimplemented a complete on-shell gauge invariant renormalization scheme, withthe possibility of switching to other schemes. We emphasize the variations dueto the choice of the renormalization scheme, in particular the one-loopdefinition of the parameter tanbeta.



Autor: N. Baro, G. Chalons, Sun Hao

Fuente: https://arxiv.org/



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