Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - B-ball baryogenesis and the baryon to dark matter ratio
AU - Enqvist, Kari
AU - McDonald, John
PY - 1999/1/11
Y1 - 1999/1/11
N2 - We demonstrate that B-ball decay in the MSSM can naturally solve the puzzle of why the densities of baryons and dark matter in the Universe are similar. This requires that the B-balls survive thermalization and decay below the freeze-out temperature of the neutralino LSP, typically 1-10 GeV, It is shown that this can happen if the baryon asymmetry originates from a squark condensate along the d = 6 u(c)d(c)d(c) D-flat direction of the MSSM scalar potential. For this to work the reheating temperature after inflation must be no greater than 10(3-5) GeV.
AB - We demonstrate that B-ball decay in the MSSM can naturally solve the puzzle of why the densities of baryons and dark matter in the Universe are similar. This requires that the B-balls survive thermalization and decay below the freeze-out temperature of the neutralino LSP, typically 1-10 GeV, It is shown that this can happen if the baryon asymmetry originates from a squark condensate along the d = 6 u(c)d(c)d(c) D-flat direction of the MSSM scalar potential. For this to work the reheating temperature after inflation must be no greater than 10(3-5) GeV.
KW - supersymmetry
KW - cosmology
KW - dark matter
KW - NONLOCAL ELECTROWEAK BARYOGENESIS
KW - EARLY UNIVERSE
KW - STANDARD MODEL
KW - BIG-BANG
KW - SUPERSYMMETRY
KW - INFLATION
KW - PHYSICS
KW - REGIME
U2 - 10.1016/S0550-3213(98)00695-6
DO - 10.1016/S0550-3213(98)00695-6
M3 - Journal article
VL - 538
SP - 321
EP - 350
JO - Nuclear Physics B
JF - Nuclear Physics B
SN - 0550-3213
IS - 1-2
ER -