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Non-Universal Gaugino Masses in the NMSSM

24 Jul 2018, 14:50
Room A

Room A


Junichiro Kawamura (Keio University)


We study the Next-to-Minimal Supersymmetric Standard Model (NMSSM)
with non-universal gaugino masses at the unification scale.
A singlet superfield is added to the minimal supersymmetric (SUSY)
extension of the Standard Model.
Its vacuum expectation value gives a SUSY-scale mass term for higgsinos.
The presence of the singlet field makes the Higgs potential complicated
and it is non-trivial to find the parameter space
where the correct electroweak symmetry breaking is realized.
Such parameter space is restrictive
if the universal boundary condition
is imposed for soft SUSY breaking parameters at the unification scale.
In this talk, we show that
a certain non-universal gaugino masses significantly relaxes this restriction
even though the trilinear couplings and the soft masses,
including the singlet self-trilinear coupling $A_\kappa$
and the singlet soft mass $m_S^2$, obey the universal boundary condition.
With the non-universality of the gaugino masses,
the higgsino is the lightest SUSY particle
and its thermal relic abundance can accommodate with the observed dark matter density.
We also argue upper bounds on masses of SUSY particles in this scenario
and its testability at future hadron colliders.

Parallel Session Supersymmetry: Models, Phenomenology and Experimental Results

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