Possible resolution of the domain wall problem in the NMSSM

Mazumdar, Anupam and Saikawa, Ken'ichi and Yamaguchi, Masahide and Yokoyama, Jun'ichi (2016) Possible resolution of the domain wall problem in the NMSSM. Physical Review D, 93 (2): 8. ISSN 1550-7998

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We discuss a possibility that the domain wall problem in the next-to-minimal supersymmetric standard model is alleviated without introducing a small explicit Z3 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.

Item Type:
Journal Article
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Physical Review D
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15 Sep 2016 15:52
Last Modified:
06 Jul 2024 23:50