2003/09/30 by G. J. Gounaris, J. Layssac, P. I. Porfyriadis +1 · 1 citation
Physics and Astronomy · #Annihilation #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Energy (signal processing) #Gluon #Inverse #Minimal Supersymmetric Standard Model #Neutralino #Particle physics #Particle physics theoretical and experimental studies #Philosophy #Physics #Production (economics) #Quantum chromodynamics #Quantum mechanics #Sensitivity (control systems) #Supersymmetry #hep-ph
paper · pdf · doi:10.1103/physrevd.69.075007
published as Phys.Rev.D69:075007,2004 · 14 pages and 1 figure; version to appear in Phys. Rev.D; Title slightly changed
arxiv created 2004/01/16 · openalex publication_date 2004/04/23 · arxiv updated 2011/07/19 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
A complete one-loop computation of the processes (\stackrel\ifmmode \else \~\fi\ensuremathχi0\stackrel\ifmmode \else \~\fi\ensuremathχj0\ensuremath↔\ensuremathγ\ensuremathγ,gg), for any pair of the four minimal supersymmetric standard model (MSSM) neutralinos, has been performed for an arbitrary c.m. energy. As a first application suitable for dark matter (DM) searches neutralino-neutralino annihilation is studied at relative velocities v/c\ensuremath≃10^\ensuremath-3, describing the present DM distribution in the galactic halo, and v/c\ensuremath≃0.5, determining neutralino relic density contributions. Numerical results are presented for 31 MSSM benchmark models indicating considerable sensitivity to the input parameters. Numerical codes are released, which may be used for the computation of the annihilation of any two neutralinos to two photons or two gluons at the aforementioned v/c values. In the near future, we intend to complement them with codes for the inverse process \ensuremathγ\stackrel\ensuremath→\ensuremathγ\stackrel\ifmmode \else \~\fi\ensuremathχi0\stackrel\ifmmode \else \~\fi\ensuremathχj0, observable at future high energy linear colliders.