Possible resolution of the domain wall problem in the NMSSM

Mazumdar, Anupam; Saikawa, Ken’ichi; Yamaguchi, Masahide; Yokoyama, Jun′ichi

doi:10.1103/physrevd.93.025002

Cited by 7 publications

(6 citation statements)

References 59 publications

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“…1 The transition between the old and new ground states takes place through a tachyonic or spinodal instability where the long-wavelength fluctuations of the spectator field become significantly enhanced, leading to the formation of homogeneous and localized spatial regions separated by domain wall configurations. The growth of these topological defects will 1 We note that similar Hubble-induced mechanisms have been advocated as a solution to the domain wall problem in a supergravity context [5,6]. We emphasize, however, that, beyond the origin of the Hubbleinduced corrections, these scenarios display some conceptual differences with the model under consideration.…”

Section: Introductionmentioning

confidence: 91%

Hubble-induced phase transitions: Walls are not forever

Bettoni

Rubio

2020

J. Cosmol. Astropart. Phys.

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The interplay between non-minimally coupled scalar fields and a kinetic-dominated era following the end of inflation triggers the spontaneous symmetry breaking of internal symmetries and the subsequent evolution of the fields towards large expectation values. We present here a detailed analysis of the associated dynamics in quintessential inflation scenarios involving a non-minimally coupled Z 2 -symmetric spectator field. By analytically following the evolution of the spectator field fluctuations at early times, we characterize the formation of classical, homogeneous and spatially-localized field configurations separated by domain walls. The life expectancy of these dividing barriers is set by the scale of inflation, the non-minimal coupling and self-interactions of the spectator field and potentially, but not necessarily, the duration of the heating stage. For most of the parameter space, the domain walls are doomed to disappear before big bang nucleosynthesis. Potential phenomenological consequences of the scenario are discussed.

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Section: Introductionmentioning

confidence: 91%

Hubble-induced phase transitions: Walls are not forever

Bettoni

Rubio

2020

J. Cosmol. Astropart. Phys.

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“…When this discrete symmetry is broken spontaneously by the Vacuum Expectation Values (VEVs) of the (pseudo)scalar fields, a potential domain wall problem arises. This problem can be solved like in the NMSSM, by JHEP01(2022)034 assuming that non-renormalisable terms pick a preferred vacuum [39,40] or by supergravity corrections during inflation [41]. 1 The soft SUSY breaking terms are…”

Section: Nmssm With Right-handed Neutrinosmentioning

confidence: 99%

Measuring neutrino dynamics in NMSSM with a right-handed sneutrino LSP at the ILC

Liu

Moretti

Waltari

2022

J. High Energ. Phys.

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We study the possibility of measuring neutrino Yukawa couplings in the Next-to-Minimal Supersymmetric Standard Model with right-handed neutrinos (NMSSMr) when the lightest right-handed sneutrino is the Dark Matter (DM) candidate, by exploiting a ‘dijet + dilepton + Missing Transverse Energy’ (MET or "Image missing") signature. We show that, contrary to the miminal realisation of Supersymmetry (SUSY), the MSSM, wherein the DM candidate is typically a much heavier (fermionic) neutralino state, this extended model of SUSY offers one with a much lighter (bosonic) state as DM that can then be produced at the next generation of e+e− colliders with energies up to 500 GeV or so. The ensuing signal, energing from chargino pair production and subsequent decay, is extremely pure so it also affords one with the possibility of extracting the Yukawa parameters of the (s)neutrino sector. Altogether, our results serve the purpose of motivating searches for light DM signals at such machines, where the DM candidate can have a mass around the Electro-Weak (EW) scale.

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“…It is possible to impose an additional discrete symmetry that will be broken only by the soft SUSY breaking terms [24] so that the coefficient ξ of the singlet tadpole term will be of the order m SUSY , possibly suppressed by loop factors. Also inflation may solve the domain wall problem [25].…”

Section: The Nmssm With Right-handed Neutrinosmentioning

confidence: 99%

Lepton number violation in heavy Higgs boson decays to sneutrinos

Moretti

Shepherd-Themistocleous

Waltari

2020

Phys. Rev. D

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We study the possibility of observing lepton number violation in the right-handed sneutrino sector of the Next-to-Minimal Supersymmetric Standard Model extended with right-handed neutrinos. The scalar potential introduces a lepton number violating mass term for the right-handed sneutrinos, which generates a phase difference between the sneutrino and antisneutrino. If we have light higgsinos and right-handed sneutrinos, the sneutrino decay width is determined by the tiny Yukawa couplings, which allows the phase difference between the sneutrino and antisneutrino states to accumulate before the sneutrino decay. We investigate the possibilities of producing sneutrino pairs resonantly through a heavy Higgs of such a model and the ability of seeing a lepton number violating signature emerging from sneutrinos at the Large Hadron Collider. We also discuss how a possible future signal of this type could be used to determine the neutrino Yukawa couplings. * S.

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Possible resolution of the domain wall problem in the NMSSM

Cited by 7 publications

References 59 publications

Hubble-induced phase transitions: Walls are not forever

Hubble-induced phase transitions: Walls are not forever

Measuring neutrino dynamics in NMSSM with a right-handed sneutrino LSP at the ILC

Lepton number violation in heavy Higgs boson decays to sneutrinos

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