Electroweak phase transition in a nonminimal supersymmetric model

Ham, S. W.; Oh, S. K.; Kim, C. M.; Yoo, E. J.; Son, D. C.

doi:10.1103/physrevd.70.075001

Cited by 50 publications

(43 citation statements)

References 36 publications

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“…The latter can be eliminated in terms of the physical Higgs mass m h , and in this model the Higgs boson is SM-like, so it has to obey the LEP bound m h > 114 GeV. Note that since the potential is stabilized by the H y H 3 term, can be negative, and in this case a barrier in the Higgs potential is present at tree-level, which triggers a first-order electroweak phase transition [9][10][11][12][13]. Here we follow closely the analysis of Ref.…”

Section: Electroweak Baryogenesismentioning

confidence: 99%

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Electric dipole moment constraints on minimal electroweak baryogenesis

2007

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We study the simplest generic extension of the standard model which allows for conventional electroweak baryogenesis, through the addition of dimension-six operators in the Higgs sector. At least one such operator is required to be CP-odd, and we study the constraints on such a minimal setup, and related scenarios with minimal flavor violation, from the null results of searches for electric dipole moments (EDMs), utilizing the full set of two-loop contributions to the EDMs. The results indicate that the current bounds are stringent, particularly that of the recently updated neutron EDM, but fall short of ruling out these scenarios. The next generation of EDM experiments should be sufficiently sensitive to provide a conclusive test.

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Section: Electroweak Baryogenesismentioning

confidence: 99%

“…Several groups have recently taken a more general effective field theory approach to the new physics required in order for EWBG to be viable [9][10][11][12][13]. The minimal possibility is the addition of two dimension-six operators to the Higgs sector, e.g.…”

Section: Introductionmentioning

confidence: 99%

Electric dipole moment constraints on minimal electroweak baryogenesis

2007

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“…Since we have already noted that the smallness of the leptonic Yukawa couplings make their role in the current SFOPT analysis insignificant, this does not present a significant loss of generality. 7 Recall that in DR scheme, decoupling is accomplished "by hand" through computing threshold corrections after integrating out fields. 8 The issue of neutrino masses in the µνSSM was studied more extensively in Ref.…”

Section: Parameter Scan and Phenomenological Boundsmentioning

confidence: 99%

“…[6][7][8][9][10][11][12][13][14], and we will discuss others throughout the remainder of this section. Since our work is most closely related to previous work on SFOPT in the NMSSM, we give here a little preview of some of the differences between our work and select previous works, in addition to the multidimensional aspect stressed above.…”

Section: Introductionmentioning

confidence: 99%

Electroweak phase transition in theμνSSM

Chung

Long

2010

Phys. Rev. D

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An extension of the MSSM called the µνSSM does not allow a conventional thermal leptogenesis scenario because of the low scale seesaw that it utilizes. Hence, we investigate the possibility of electroweak baryogenesis. Specifically, we identify a parameter region for which the electroweak phase transition is sufficiently strongly first order to realize electroweak baryogenesis. In addition to transitions that are similar to those in the NMSSM, we find a novel class of phase transitions in which there is a rotation in the singlet vector space.

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“…Methods to strengthen the first-order phase transition beyond the SM and MSSM are now widely discussed [13,14,15,16,17,18,19,20,21]. Several of these ideas add a singlet field, such as in the NMSSM or nMSSM.…”

Section: Introductionmentioning

confidence: 99%

Four generations, the electroweak phase transition, and supersymmetry

Fok

Kribs

2008

Phys. Rev. D

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We calculate the strength of the electroweak phase transition in a supersymmetric model with four chiral generations. The additional chiral fermions (and scalar partners) lower the critical temperature and thus strengthen the first-order phase transition. The scalar partners stabilize the potential, leading to an effective theory that is bounded from below. We identify the ensemble of parameters where φc/Tc > ∼ 1 simultaneous with obtaining a large enough Higgs mass. Our calculations focus on a subset of the full four generational supersymmetric parameter space: We take the pseudoscalar heavy, tan β = 1, and neglect all subleading contributions to the effective potential. We find that the region of parameter space with a strong first-order phase transition requires mq /m q < ∼ 1.1 while the constraint on the lightest Higgs mass requires mq /m q > ∼ 1 with m q > ∼ 300 GeV. We are led to an intriguing prediction of quarks and squarks just beyond the current Tevatron direct search limits that are poised to be discovered quickly at the LHC.

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Electroweak phase transition in a nonminimal supersymmetric model

Cited by 50 publications

References 36 publications

Electric dipole moment constraints on minimal electroweak baryogenesis

Electric dipole moment constraints on minimal electroweak baryogenesis

Electroweak phase transition in theμνSSM

Four generations, the electroweak phase transition, and supersymmetry

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