Singlino-driven electroweak baryogenesis in the next-to-MSSM

Cheung, Kingman; Hou, Tie‐Jiun; Lee, Jae Sik; Senaha, Eibun

doi:10.1016/j.physletb.2012.02.070

Cited by 39 publications

(48 citation statements)

References 63 publications

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“…• can be easily probed in the proposed future experiments searching for the EDMs of deuteron and the 225 Ra atom and it might be connected to the EWBG, providing a new mechanism for it [61].…”

Section: Discussionmentioning

confidence: 99%

Higgs-mediated electric-dipole moments in the next-to-minimal supersymmetric standard model: An application to electroweak baryogenesis

et al. 2011

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We perform a study on the predictions of electric-dipole moments (EDMs) of neutron, Mercury (Hg), Thallium (Tl), deuteron, and Radium (Ra) in the framework of next-tominimal supersymmetric standard model (NMSSM) with CP-violating parameters in the superpotential and soft-supersymmetry-breaking sector. We confine to the case in which only the physical tree-level CP phase (φ ′ λ − φ ′ κ ), associated with the couplings of the singlet terms in the superpotential and with the vacuum-expectation-values (VEVs), takes on a nonzero value. We found that the one-loop contributions from neutralinos are mostly small while the two-loop Higgs-mediated contributions of the Barr-Zee (BZ) type diagrams dominate. We emphasize a scenario motivated by electroweak baryogenesis.

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Section: Discussionmentioning

confidence: 99%

Higgs-mediated electric-dipole moments in the next-to-minimal supersymmetric standard model: An application to electroweak baryogenesis

et al. 2011

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“…In the region of interest, however, the singlet vev does not change very significantly during the EWPT. Consequently, even though the variation of the singlet vev was crucial for achieving a strongly first-order phase transition, we ignore its space-dependence here 12 and approximate µ(x) by its value after the EWPT, µ(x) ≃ µ. Then the mode expansions for the operators in the Lagrangian Eq.…”

Section: A the Vev-insertion Approximationmentioning

confidence: 99%

“…In particular, there is a resonant relaxation term (and possible CP-violating source [12]) arising from higgsino-singlino interactions with the Higgs vevs. The relevant part of the Lagrangian is…”

Section: A the Vev-insertion Approximationmentioning

confidence: 99%

“…[9]). The NMSSM framework, in fact, accommodates tree-level cubic couplings entering the relevant scalar effective potential driving the EWPT needed to produce a sufficiently strongly first-order phase transition (this is in turn needed to prevent wash-out of the generated baryon asymmetry in regions of broken electroweak phase), as realized a long time ago [10,11] and reinforced in recent analyses [12] (see Refs. [13,14] for similar arguments in related models).…”

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confidence: 99%

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Electroweak baryogenesis and the Fermi gamma-ray line

2013

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Many particle physics models attempt to explain the 130 GeV gamma-ray feature that the Fermi-LAT observes in the Galactic Center. Neutralino dark matter in non-minimal supersymmetric models, such as the NMSSM, is an especially well-motivated theoretical setup which can explain the line. We explore the possibility that regions of the NMSSM consistent with the 130 GeV line can also produce the observed baryon asymmetry of the universe via electroweak baryogenesis. We find that such regions can in fact accommodate a strongly first-order electroweak phase transition (due to the singlet contribution to the effective potential), while also avoiding a light stop and producing a Standard Model-like Higgs in the observed mass range.Simultaneously, CP-violation from a complex phase in the wino-higgsino sector can account for the observed baryon asymmetry through resonant sources at the electroweak phase transition, while satisfying current constraints from dark matter, collider, and electric dipole moment (EDM) experiments. This result is possible by virtue of a relatively light pseudoscalar Higgs sector with a small degree of mixing, which yields efficient s-channel resonant neutralino annihilation consistent with indirect detection constraints, and of the moderate values of µ required to obtain a bino-like LSP consistent with the line. The wino mass is essentially a free parameter which one can tune to satisfy electroweak baryogenesis. Thus, the NMSSM framework can potentially explain the origins of both baryonic and dark matter components in the Universe. The tightness of the constraints we impose on this scenario makes it extraordinarily predictive, and conclusively testable in the near future by modest improvements in EDM and dark matter search experiments.

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“…This approximation, however, can miss substantial "memory effects" that can result in resonant enhancements of the BAU of up to several orders of magnitude when the masses are near degenerate 5 [76]. Non-equilibrium quantum field theory has also been used [77,78], utilizing the closed time path (CTP) formalism [79][80][81][82][83][84] to calculate the BAU in the presence of the resonances. ref.…”

Section: Jhep11(2017)051mentioning

confidence: 99%

Electroweak baryogenesis in the $$ {\mathbb{Z}}_3 $$-invariant NMSSM

Akula

Balázs

Dunn

et al. 2017

J. High Energ. Phys.

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Abstract:We calculate the baryon asymmetry of the Universe in the Z 3 -invariant Nextto-Minimal Supersymmetric Standard Model where the interactions of the singlino provide the necessary source of charge and parity violation. Using the closed time path formalism, we derive and solve transport equations for the cases where the singlet acquires a vacuum expectation value (VEV) before and during the electroweak phase transition. We perform a detailed scan to show how the baryon asymmetry varies throughout the relevant parameter space. Our results show that the case where the singlet acquires a VEV during the electroweak phase transition typically generates a larger baryon asymmetry, although we expect that the case where the singlet acquires a VEV first is far more common for any model in which parameters unify at a high scale. Finally, we examine the dependence of the baryon asymmetry on the three-body interactions involving gauge singlets.

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Singlino-driven electroweak baryogenesis in the next-to-MSSM

Cited by 39 publications

References 63 publications

Higgs-mediated electric-dipole moments in the next-to-minimal supersymmetric standard model: An application to electroweak baryogenesis

Higgs-mediated electric-dipole moments in the next-to-minimal supersymmetric standard model: An application to electroweak baryogenesis

Electroweak baryogenesis and the Fermi gamma-ray line

Electroweak baryogenesis in the $$ {\mathbb{Z}}_3 $$-invariant NMSSM

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