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Q-balls and baryogenesis in the MSSM

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Q-balls and baryogenesis in the MSSM. / Enqvist, Kari; McDonald, John.
In: Physics Letters B, Vol. 425, No. 3-4, 23.04.1998, p. 309-321.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Enqvist, K & McDonald, J 1998, 'Q-balls and baryogenesis in the MSSM', Physics Letters B, vol. 425, no. 3-4, pp. 309-321. https://doi.org/10.1016/S0370-2693(98)00271-8

APA

Enqvist, K., & McDonald, J. (1998). Q-balls and baryogenesis in the MSSM. Physics Letters B, 425(3-4), 309-321. https://doi.org/10.1016/S0370-2693(98)00271-8

Vancouver

Enqvist K, McDonald J. Q-balls and baryogenesis in the MSSM. Physics Letters B. 1998 Apr 23;425(3-4):309-321. doi: 10.1016/S0370-2693(98)00271-8

Author

Enqvist, Kari ; McDonald, John. / Q-balls and baryogenesis in the MSSM. In: Physics Letters B. 1998 ; Vol. 425, No. 3-4. pp. 309-321.

Bibtex

@article{bf89fa26eaa044f193fbad871768d606,
title = "Q-balls and baryogenesis in the MSSM",
abstract = "We show that Q-balls naturally exist in the Minimal Supersymmetric Standard Model (MSSM) with soft SUSY breaking terms of the minimal N = 1 SUGRA type. These are associated with the F-and D-flat directions of the scalar potential once radiative corrections are taken into account. We consider two distinct cases, corresponding to the {"}HuL{"} (slepton) direction with L-balls and the {"}u(c)d(c)d(c){"} and {"}u(c)u(c)d(c)e(c){"} (squark) directions with B-balls. The L-ball always has a small charge, typically of the order of 1000, whilst the B-ball can have an arbitrarily large charge, which, when created cosmologically by the collapse of an unstable Affleck-Dine condensate, is likely to be greater than 10(14). The B-balls typically decay at temperatures less than that of the electroweak phase transition, leading to a novel version of Affleck-Dine baryogenesis, in which the B asymmetry comes from Q-ball decay rather than condensate decay. This mechanism can work even in the presence of additional L violating interactions or B-L conservation, which would rule out conventional Affleck-Dine baryogenesis.",
keywords = "STANDARD MODEL, SUPERGRAVITY, BREAKING, SUPERSYMMETRY, INFLATION, UNIVERSE",
author = "Kari Enqvist and John McDonald",
year = "1998",
month = apr,
day = "23",
doi = "10.1016/S0370-2693(98)00271-8",
language = "English",
volume = "425",
pages = "309--321",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "ELSEVIER SCIENCE BV",
number = "3-4",

}

RIS

TY - JOUR

T1 - Q-balls and baryogenesis in the MSSM

AU - Enqvist, Kari

AU - McDonald, John

PY - 1998/4/23

Y1 - 1998/4/23

N2 - We show that Q-balls naturally exist in the Minimal Supersymmetric Standard Model (MSSM) with soft SUSY breaking terms of the minimal N = 1 SUGRA type. These are associated with the F-and D-flat directions of the scalar potential once radiative corrections are taken into account. We consider two distinct cases, corresponding to the "HuL" (slepton) direction with L-balls and the "u(c)d(c)d(c)" and "u(c)u(c)d(c)e(c)" (squark) directions with B-balls. The L-ball always has a small charge, typically of the order of 1000, whilst the B-ball can have an arbitrarily large charge, which, when created cosmologically by the collapse of an unstable Affleck-Dine condensate, is likely to be greater than 10(14). The B-balls typically decay at temperatures less than that of the electroweak phase transition, leading to a novel version of Affleck-Dine baryogenesis, in which the B asymmetry comes from Q-ball decay rather than condensate decay. This mechanism can work even in the presence of additional L violating interactions or B-L conservation, which would rule out conventional Affleck-Dine baryogenesis.

AB - We show that Q-balls naturally exist in the Minimal Supersymmetric Standard Model (MSSM) with soft SUSY breaking terms of the minimal N = 1 SUGRA type. These are associated with the F-and D-flat directions of the scalar potential once radiative corrections are taken into account. We consider two distinct cases, corresponding to the "HuL" (slepton) direction with L-balls and the "u(c)d(c)d(c)" and "u(c)u(c)d(c)e(c)" (squark) directions with B-balls. The L-ball always has a small charge, typically of the order of 1000, whilst the B-ball can have an arbitrarily large charge, which, when created cosmologically by the collapse of an unstable Affleck-Dine condensate, is likely to be greater than 10(14). The B-balls typically decay at temperatures less than that of the electroweak phase transition, leading to a novel version of Affleck-Dine baryogenesis, in which the B asymmetry comes from Q-ball decay rather than condensate decay. This mechanism can work even in the presence of additional L violating interactions or B-L conservation, which would rule out conventional Affleck-Dine baryogenesis.

KW - STANDARD MODEL

KW - SUPERGRAVITY

KW - BREAKING

KW - SUPERSYMMETRY

KW - INFLATION

KW - UNIVERSE

U2 - 10.1016/S0370-2693(98)00271-8

DO - 10.1016/S0370-2693(98)00271-8

M3 - Journal article

VL - 425

SP - 309

EP - 321

JO - Physics Letters B

JF - Physics Letters B

SN - 0370-2693

IS - 3-4

ER -