Constraints from unrealistic vacua in the supersymmetric standard model with neutrino mass operators

Kanehata, Yoshimi; Kobayashi, Tatsuo; Konishi, Yasufumi; Shimomura, Takashi

doi:10.1103/physrevd.82.075018

Cited by 4 publications

(7 citation statements)

References 21 publications

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“…Finally, when the effective potential includes a singlet degree of freedom, the 'physical' vacuum, in which electroweak symmetry is spontaneously broken, may no longer be the most energetically favorable configuration [80,81]. In the scenarios we consider, this tends to happen for large values of the tri-singlet SUSY-breaking coupling A κ and/or relatively light sfermions.…”

Section: Other Constraintsmentioning

confidence: 97%

Light NMSSM neutralino dark matter in the wake of CDMS II and a 126 GeV Higgs boson

Kozaczuk

Profumo

2014

Phys. Rev. D

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Recent results from the Cryogenic Dark Matter Search (CDMS) experiment have renewed interest in light (5-15 GeV) dark matter (DM) with a large spin-independent neutralino-nucleon scattering cross-section,−42 cm 2 . Previous work had suggested that the lightest neutralino in the Next-to-MSSM can fall in this mass range and achieve both the correct thermal relic abundance and the desired level for the scattering cross section, provided light Higgs bosons to mediate the pair annihilation and neutralino-nucleon scattering.However

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Section: Other Constraintsmentioning

confidence: 97%

Light NMSSM neutralino dark matter in the wake of CDMS II and a 126 GeV Higgs boson

Kozaczuk

Profumo

2014

Phys. Rev. D

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“…Systematic studies on such unrealistic vacua and UFB directions have been carried out in the MSSM [44]. Recently, such analyses were also extended including terms generating non-vanishing neutrino masses and the corresponding soft SUSY breaking terms [45,46], and flavour physics, e.g. [47][48][49].…”

Section: Introductionmentioning

confidence: 99%

Constraints from Unrealistic Vacua in the Next-to-Minimal Supersymmetric Standard Model

Kanehata¹,

Kobayashi²,

Konishi³

et al. 2011

Progress of Theoretical Physics

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We study constraints to avoid deep unrealistic minima in the next-to-minimal supersymmetric standard model. We analyze a scalar potential along directions where all of and one of the three Higgs fields develop their vacuum expectation values, and find unrealistic minima deeper than the electroweak symmetry breaking (EWSB) vacuum. These unrealistic minima threaten the realization of the successful EWSB and therefore should be avoided. Necessary conditions to avoid these minima result in constraints of parameters. We show that a wide and significant region of the parameter space, especially large λ, is ruled out by our constraints.

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“…Contrarily to MSSM, though, it is not possible to solve the EW vevs in terms of the couplings and dimensional parameters of TESSM, and therefore in principle one should run the vevs by using the Callan Symanzik equation for the effective potential of a softly broken supersymmetric theory [22]. Analogously to the NMSSM case [18,19], though, we choose to simplify our analysis by evaluating V EW at the EW scale v w = 246 GeV. In Section IV we find that the stability constraints obtained by comparing unrealistic vacua with V EW (v w ) are generally conservative.…”

Section: The Modelmentioning

confidence: 99%

“…In the following subsection we work out the expressions for the potential along the four UFB directions expressed by Eqs. (18,19) and define the stability constraints associated with each of them.…”

Section: Iii1 Relevant Vevsmentioning

confidence: 99%

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Stability constraints in triplet extension of the MSSM

2015

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We study the stability constraints on the parameter space of a triplet extension of MSSM.Existence of unbounded from below directions in the potential can spoil successful Electroweak (EW) symmetry breaking by making the corresponding minimum unstable, and hence the model should be free from those directions. Avoiding those directions restricts the parameter space of the model. We derive four stability constraints, of which only three independent from each other.After scanning the model's parameter space for phenomenologically viable data points, we impose the stability constraints and find that only about a quarter of the data points features a stable EW minimum. At those data points featuring stability, µ and the up Higgs soft mass turn out to be smaller than about a TeV in absolute value, which make the mass of the lightest chargino and neutralino smaller than about 700 GeV. Two relevant phenomenological consequences of lifting the unbounded from below directions are that the lightest Higgs boson decay rate to diphoton predicted by the triplet extension of MSSM generally features larger deviations from MSSM and fine tuning is actually higher, that what each of the two would be without imposing stability constraints.

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Constraints from unrealistic vacua in the supersymmetric standard model with neutrino mass operators

Cited by 4 publications

References 21 publications

Light NMSSM neutralino dark matter in the wake of CDMS II and a 126 GeV Higgs boson

Light NMSSM neutralino dark matter in the wake of CDMS II and a 126 GeV Higgs boson

Constraints from Unrealistic Vacua in the Next-to-Minimal Supersymmetric Standard Model

Stability constraints in triplet extension of the MSSM

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