A possible connection between neutrino mass generation and the lightness of a NMSSM pseudoscalar

Details A possible connection between neutrino mass generation and the lightness of a NMSSM pseudoscalar A possible connection between neutrino mass generation and the lightness of a NMSSM pseudoscalar

2010-11-23

arxiv.org/abs/1011.5037v2

Phys.Lett.B700:351-355,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages; v2: version to appear in PLB

Scientific paper

10.1016/j.physletb.2011.05.020

One of the interesting properties of the NMSSM is that it can accommodate a light pseudoscalar of order 10 GeV. However, such scenarios are challenged by several experimental constraints, especially those related to the fermionic decays of the pseudoscalar. In this Letter, we extend the NMSSM field content by two gauge singlets, with lepton numbers +1 and -1. This serves the twin purpose of generating neutrino masses via the inverse see-saw mechanism and keeping the option of a very light pseudoscalar experimentally viable by opening dominant invisible decay channels of the pseudoscalar which help it evade the existing bounds.

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