TY - JOUR
T1 - Asymmetric higgsino dark matter
AU - Blum, Kfir
AU - Efrati, Aielet
AU - Grossman, Yuval
AU - Nir, Yosef
AU - Riotto, Antonio
PY - 2012/7/31
Y1 - 2012/7/31
N2 - In the supersymmetric framework, prior to the electroweak phase transition, the existence of a baryon asymmetry implies the existence of a Higgsino asymmetry. We investigate whether the Higgsino could be a viable asymmetric dark matter candidate. We find that this is indeed possible. Thus, supersymmetry can provide the observed dark matter abundance and, furthermore, relate it with the baryon asymmetry, in which case the puzzle of why the baryonic and dark matter mass densities are similar would be explained. To accomplish this task, two conditions are required. First, the gauginos, squarks, and sleptons must all be very heavy, such that the only electroweak-scale superpartners are the Higgsinos. With this spectrum, supersymmetry does not solve the fine-tuning problem. Second, the temperature of the electroweak phase transition must be low, in the (1-10)GeV range. This condition requires an extension of the minimal supersymmetric standard model.
AB - In the supersymmetric framework, prior to the electroweak phase transition, the existence of a baryon asymmetry implies the existence of a Higgsino asymmetry. We investigate whether the Higgsino could be a viable asymmetric dark matter candidate. We find that this is indeed possible. Thus, supersymmetry can provide the observed dark matter abundance and, furthermore, relate it with the baryon asymmetry, in which case the puzzle of why the baryonic and dark matter mass densities are similar would be explained. To accomplish this task, two conditions are required. First, the gauginos, squarks, and sleptons must all be very heavy, such that the only electroweak-scale superpartners are the Higgsinos. With this spectrum, supersymmetry does not solve the fine-tuning problem. Second, the temperature of the electroweak phase transition must be low, in the (1-10)GeV range. This condition requires an extension of the minimal supersymmetric standard model.
UR - http://www.scopus.com/inward/record.url?scp=84864460782&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.109.051302
DO - 10.1103/PhysRevLett.109.051302
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AN - SCOPUS:84864460782
SN - 0031-9007
VL - 109
JO - Physical Review Letters
JF - Physical Review Letters
IS - 5
M1 - 051302
ER -