The Dark Matter Constraints on the Left-Right Symmetric Model with Z_2 Symmetry

Abstract

In the framework of Left-Right symmetric model, we investigate an interesting scenario, in which the so-called VEV seesaw problem can be naturally solved with Z_2 symmetry. In such a scenario, we find a pair of stable weakly interacting massive particles (WIMPs), which may be the cold dark matter candidates. However, the WIMP-nucleon cross section is 3-5 orders of magnitude above the present upper bounds from the direct dark matter detection experiments for $m\sim 10^2-10^4$ GeV. As a result, the relic number density of two stable particles has to be strongly suppressed to a very small level. Nevertheless, our analysis shows that this scenario can't provide very large annihilation cross sections so as to give the desired relic abundance except for the resonance case. Only for the case if the rotation curves of disk galaxies are explained by the Modified Newtonian Dynamics (MOND), the stable WIMPs could be as the candidates of cold dark matter.

25 pages, 4 figures, 5 tables. typos corrected, a figure added, accepted for publication in Physical Review D

References in corpus (5)

• Improved Naturalness with a Heavy Higgs: An Alternative Road to LHC Physics
• General CP Violation in Minimal Left-Right Symmetric Model and Constraints on the Right-Handed Scale
• Right-Handed Quark Mixings in Minimal Left-Right Symmetric Model with General CP Violation
• Dark Matter in the Left Right Twin Higgs Model
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Cited by in corpus (5)

• Enhancement of Dark Matter Annihilation via Breit-Wigner Resonance
• Constraints on Dark Matter Annihilation Cross Section in Scenarios of Brane-World and Quintessence
• Gauge-singlet dark matter in a left-right symmetric model with spontaneous CP violation
• Searching for Dark Matter Signals in the Left-Right Symmetric Gauge Model with CP Symmetry
• Confronting dark fermion with a doubly charged Higgs in the left-right symmetric model