Regulating the baryon asymmetry in no-scale Affleck-Dine baryogenesis

Bruce A. Campbell; Mary K. Gaillard; Hitoshi Murayama; Keith A. Olive

doi:10.1016/S0550-3213(98)00574-4

Regulating the baryon asymmetry in no-scale Affleck-Dine baryogenesis

Bruce A. Campbell, Mary K. Gaillard, Hitoshi Murayama, Keith A. Olive

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

In supergravity models (such as standard superstring constructions) that possess a Heisenberg symmetry, supersymmetry breaking by the inflationary vacuum energy does not lift flat directions at tree-level. One-loop corrections give small squared masses that are negative (∼ -g²H²/(4π)²) for all flat directions that do not involve the stop. After inflation, these flat directions generate a large baryon asymmetry; typically n_B/S ∼ O(1). We consider mechanisms for suppressing this asymmetry to the observed level. These include dilution from inflaton or moduli decay, GUT non-flatness of the vev direction, and higher dimensional operators in both GUT models and the MSSM. We find that the observed BAU can easily be generated when one or more of these effects is present.

Original language	English (US)
Pages (from-to)	351-367
Number of pages	17
Journal	Nuclear Physics B
Volume	538
Issue number	1-2
DOIs	https://doi.org/10.1016/S0550-3213(98)00574-4
State	Published - Jan 11 1999

Bibliographical note

Funding Information:
This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contracts DE-FG02-94ER-40823 and DE-AC03-76SF00098, by NSF grants AST-91-20005 and PHY-95-14797 and by the Alfred E Sloan Foundation.

Funding Information:
Supersymmetric (SUSY) theories possess a unique and efficient mechanism for the generation of a cosmological baryon asymmetry through the decay of scalar fields along nearly Fand D-flat directions of the scalar potential, using baryon number violation * This work was supported in part by DoE grants DE-FG02-94ER-40823 and DE-AC03-76SF00098, and by NSF grants AST-91-20005 and PHY-95-14797 and by the Alfred P. Sloan Foundation.

Keywords

Baryogenesis
Cosmology
Inflation
Supergravity
Supersymmetry

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10.1016/S0550-3213(98)00574-4

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title = "Regulating the baryon asymmetry in no-scale Affleck-Dine baryogenesis",

abstract = "In supergravity models (such as standard superstring constructions) that possess a Heisenberg symmetry, supersymmetry breaking by the inflationary vacuum energy does not lift flat directions at tree-level. One-loop corrections give small squared masses that are negative (∼ -g2H2/(4π)2) for all flat directions that do not involve the stop. After inflation, these flat directions generate a large baryon asymmetry; typically nB/S ∼ O(1). We consider mechanisms for suppressing this asymmetry to the observed level. These include dilution from inflaton or moduli decay, GUT non-flatness of the vev direction, and higher dimensional operators in both GUT models and the MSSM. We find that the observed BAU can easily be generated when one or more of these effects is present.",

keywords = "Baryogenesis, Cosmology, Inflation, Supergravity, Supersymmetry",

author = "Campbell, {Bruce A.} and Gaillard, {Mary K.} and Hitoshi Murayama and Olive, {Keith A.}",

note = "Funding Information: This work was supported in part by the Director, Office of Energy Research, Office of High Energy and Nuclear Physics, Division of High Energy Physics of the U.S. Department of Energy under Contracts DE-FG02-94ER-40823 and DE-AC03-76SF00098, by NSF grants AST-91-20005 and PHY-95-14797 and by the Alfred E Sloan Foundation. Funding Information: Supersymmetric (SUSY) theories possess a unique and efficient mechanism for the generation of a cosmological baryon asymmetry through the decay of scalar fields along nearly Fand D-flat directions of the scalar potential, using baryon number violation * This work was supported in part by DoE grants DE-FG02-94ER-40823 and DE-AC03-76SF00098, and by NSF grants AST-91-20005 and PHY-95-14797 and by the Alfred P. Sloan Foundation.",

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N2 - In supergravity models (such as standard superstring constructions) that possess a Heisenberg symmetry, supersymmetry breaking by the inflationary vacuum energy does not lift flat directions at tree-level. One-loop corrections give small squared masses that are negative (∼ -g2H2/(4π)2) for all flat directions that do not involve the stop. After inflation, these flat directions generate a large baryon asymmetry; typically nB/S ∼ O(1). We consider mechanisms for suppressing this asymmetry to the observed level. These include dilution from inflaton or moduli decay, GUT non-flatness of the vev direction, and higher dimensional operators in both GUT models and the MSSM. We find that the observed BAU can easily be generated when one or more of these effects is present.

AB - In supergravity models (such as standard superstring constructions) that possess a Heisenberg symmetry, supersymmetry breaking by the inflationary vacuum energy does not lift flat directions at tree-level. One-loop corrections give small squared masses that are negative (∼ -g2H2/(4π)2) for all flat directions that do not involve the stop. After inflation, these flat directions generate a large baryon asymmetry; typically nB/S ∼ O(1). We consider mechanisms for suppressing this asymmetry to the observed level. These include dilution from inflaton or moduli decay, GUT non-flatness of the vev direction, and higher dimensional operators in both GUT models and the MSSM. We find that the observed BAU can easily be generated when one or more of these effects is present.

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Regulating the baryon asymmetry in no-scale Affleck-Dine baryogenesis

Abstract

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