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arXiv · 1511.01905

Possible resolution of the domain wall problem in the NMSSM

Anupam Mazumdar·Ken'ichi Saikawa·Masahide Yamaguchi·Jun'ichi Yokoyama
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Abstract

We discuss a possibility that the domain wall problem in the next-to-minimal supersymmetric standard model is alleviated without introducing a small explicit $Z_3$ breaking term by analyzing the evolution of the singlet scalar field within an inflationary paradigm. The singlet scalar field which explains the $μ$-term tracks a time-varying minimum of the effective potential after inflation and slowly rolls down to its global minimum if there exist sufficiently large negative Hubble-induced corrections on the effective potential for the singlet field, which arise through supergravity. As a consequence, the whole Universe is confined within a single domain during and after inflation, which prevents the formation of domain walls. This will further constrain the history of the early Universe along with the Higgs-singlet coupling.

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Anupam Mazumdar, Ken'ichi Saikawa, Masahide Yamaguchi, Jun'ichi Yokoyama. 2016-01-07. Possible resolution of the domain wall problem in the NMSSM. https://doi.org/10.1103/physrevd.93.025002

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