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- Title
Exploring viable vacua of the Z -symmetric NMSSM.
- Authors
Beuria, Jyotiranjan; Chattopadhyay, Utpal; Datta, AseshKrishna; Dey, Abhishek
- Abstract
We explore the vacua of the Z -symmetric Next-to-Minimal Supersymmetric Standard Model (NMSSM) and their stability by going beyond the simplistic paradigm that works with a tree-level neutral scalar potential and adheres to some specific flat directions in the field space. We work in the so-called phenomenological NMSSM (pNMSSM) scenario. Also, for our purpose, we adhere to a reasonably 'natural' setup by requiring | μ | not too large. Key effects are demonstrated by first studying the profiles of this potential under various circumstances of physical interest via a semi-analytical approach. The results thereof are compared to the ones obtained from a dedicated package like Vevacious which further incorporates the thermal effects to the potential. Regions of the pNMSSM parameter space that render the desired symmetry breaking (DSB) vacuum absolutely stable, long- or short-lived (in relation to the age of the Universe) under quantum/thermal tunneling are delineated. Regions that result in the appearance of color and charge breaking (CCB) minima are also presented. It is demonstrated that light singlet scalars along with a light LSP (lightest supersymmetric particle) having an appreciable singlino admixture are compatible with a viable DSB vacuum. Their implications for collider experiments are commented upon.
- Subjects
SUPERSYMMETRY; STANDARD model (Nuclear physics); STABILITY (Mechanics); QUANTUM tunneling; SINGLET state (Quantum mechanics); COLLIDERS (Nuclear physics)
- Publication
Journal of High Energy Physics, 2017, Vol 2017, Issue 4, p1
- ISSN
1126-6708
- Publication type
Article
- DOI
10.1007/JHEP04(2017)024