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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/4519

Title: Cosmology in a supersymmetric model with gauged B - L symmetry
Authors: SARKAR, A
YAJNIK, UA
Keywords: electroweak baryogenesis
soft leptogenesis
domain-walls
scale
inflation
breaking
decay
mass
Issue Date: 2007
Publisher: AMER PHYSICAL SOC
Citation: PHYSICAL REVIEW D, 76(2), -
Abstract: We consider salient cosmological features of a supersymmetric model which is left-right symmetric and therefore possessing gauged B-L symmetry. The requirement of breaking parity and also obtaining charge preserving vacua introduces some unique features to this model (MSLRM), resulting in a preference for nonthermal leptogenesis. Assuming that the model preserves TeV scale supersymmetry, we show that the vacuum structure generically possesses domain walls, which can serve two important purposes. They can signal a secondary inflation required to remove unwanted relics such as gravitino and moduli and also generate lepton asymmetry by a mechanism similar to electroweak baryogenesis. The requirement of disappearance of domain walls imposes constraints on the soft parameters of the theory, testable at the TeV scale. We also propose an alternative model with spontaneous parity violation (MSLRP). Incorporating the same cosmological considerations in this case entails constraints on a different set of soft parameters.
URI: http://dx.doi.org/10.1103/PhysRevD.76.025001
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4519
http://hdl.handle.net/10054/4519
ISSN: 1550-7998
Appears in Collections:Article

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