Neutralino-neutralino annihilation to gammaZ in MSSM

Abstract

The 1-loop computation of the processes $\tchi_i \tchi_j \to γZ$ has been performed at an arbitrary c.m. energy for any pair of MSSM neutralinos. As an application suitable for Dark Matter (DM) searches, the neutralino-neutralino annihilation is studied at the limiting case of vanishing relative velocity, describing the present DM distribution in the galactic halo; and at a relative velocity of about 0.5, determining the neutralino relic density contributions. The most useful situation is obviously for $i=j=1$, but the case of non-identical neutralinos may also be useful in some corners of the parameter space. Our results are contained in the FORTRAN code PLATONdmgZ, applying to any set of real MSSM parameters. Numerical results are also presented for a sample of 6 MSSM models, describing the various possible neutralino properties. A comparison with other existing works is also made.

arXiv comment14 pages, 7 figures, Version to appear in Physical Review D

References in corpus (20)

• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Particle Dark Matter: Evidence, Candidates and Constraints
• Supersymmetric Dark Matter
• Automatized One-Loop Calculations in 4 and D dimensions
• Full One-loop Calculation of Neutralino Annihilation into Two Photons
• Neutralino Annihilation into a Photon and a Z boson
• Neutralino Annihilation into Two Photons
• Cosmology at the Millennium
• Self-annihilation of the neutralino dark matter into two photons or a Z and a photon in the MSSM
• Adiabatic compression and indirect detection of supersymmetric dark matter
• Dark Matter and the CACTUS Gamma-Ray Excess from Draco
• Galactic Gamma Halo by Heavy Neutrino annihilations?
• About helicity conservation in gauge boson scattering at high energy
• A description of the neutralino observables in terms of projectors
• Particle Dark Matter Physics: An Update
• Neutralino pair production at CERN LHC
• Neutralino-neutralino annihilation to photon and gluon pairs in MSSM models
• SUSY dark matter --A collider Physicist's Perspective--
• Single Neutralino production at CERN LHC
• Neutralino pair production in a $\gamma \gamma$ Collider

Cited by in corpus (1)

• Addendum to "Helicity conservation in gauge boson scattering at high energy"