منابع مشابه
Light Higgsino Dark Matter
We re–investigate the question whether a light higgsino–like neutralino is a viable Dark Matter candidate. To this end we compute the dominant one–loop corrections to the masses of the higgsino–like states in the minimal Supersymmetric Standard Model (MSSM), due to loops involving heavy quarks and their superpartners. We also calculate analogous corrections to the couplings of higgsino–like neu...
متن کاملHiggsino dark matter in partly supersymmetric models
Models where supersymmetry (SUSY) is manifest only in a sector of the low-energy spectrum have been recently proposed as an alternative to the MSSM. In these models the electroweak scale is explained by a fine-tuning between different Higgs mass contributions (split-SUSY models), or by the localization of the Higgs sector in a point of an extra dimension where all the mass parameters are suppre...
متن کاملHiggsino cold dark matter motivated by collider data.
Motivated by the supersymmetric interpretation of the CDF eeγγ+ / ET event and the reported Z → bb̄ excess at LEP, we analyze the Higgsino as a cold dark matter candidate. We examine the constraints as implied by the collider experiments, and then calculate its relic density. We find that this Higgsino-like lightest supersymmetric particle is a viable cold dark matter candidate (0.05 < Ωh < 1), ...
متن کاملHiggsino and Wino Dark Matter from Q-ball Decay
We claim that the Higgsino-like and wino-like neutralinos can be good dark matter candidates if they are produced by the late time decay of Q-ball. The late time decays of the Q-balls into these LSP’s and subsequent pair annihilations of the LSP’s naturally lead to the desired mass density of dark matter. Furthermore, these dark matter can be much more easily detected by the dark-matter search ...
متن کاملNucleon scattering with higgsino and wino cold dark matter
Neutralinos that are mostly wino or higgsino are shown to be compatible with the recent DAMA annual modulation signal. The nucleon scattering rates for these dark matter candidates are typically an order of magnitude above the oft-considered bino. Although thermal evolution of higgsino and wino number densities in the early universe implies that they are not viable dark matter candidates, non-t...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1997
ISSN: 0556-2821,1089-4918
DOI: 10.1103/physrevd.56.276