Spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by Majorana neutrino mass matrix

Gu, Ping

doi:10.1007/jhep10(2017)016

Cited by 4 publications

(3 citation statements)

References 83 publications

(119 reference statements)

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“…1 Models with a twin sector, or sometimes called the mirror sector, have been described as the parity solution to the strong CP problem in the literature [22][23][24][25][26][27][28][29][30][31][32][33]. The present model, however, can not solve this problem because of the difference in the couplings, and hence there is no parity.…”

Section: Neutrino Masses and Interactionsmentioning

confidence: 94%

A Right-handed neutrino portal to the hidden sector: active neutrinos and their twins in an F-theory model

Kawamura

Raby

2023

J. High Energ. Phys.

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We analyze the neutrino phenomenology in an SU(5) F-theory model with both a visible sector and a twin hidden sector. At low energies, the strong and weak scales of the two sectors may differ but the spectrum of states is described by the MSSM (MSSM′) in the visible (twin) sectors. What is special about the model is that there are right-handed neutrinos which couple to both sectors via Yukawa couplings. As a result, assuming 3 right-handed neutrinos with a large mass much greater than the weak scale, at tree-level the seesaw mechanism results in 3 massive Majorana neutrinos and 3 massless ones. The massless neutrinos acquire mass via radiative corrections. In our analysis, the massless neutrinos are predominantly active neutrinos, while the massive neutrinos are predominantly sterile neutrinos. We fit the active neutrino masses and mixing angles and discuss the phenomenology of the lightest sterile neutrino. Finally we consider some possible scenarios for cosmology.

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Section: Neutrino Masses and Interactionsmentioning

confidence: 94%

A Right-handed neutrino portal to the hidden sector: active neutrinos and their twins in an F-theory model

Kawamura

Raby

2023

J. High Energ. Phys.

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“…Apart from N decay, we are aware that left-handed mirror neutrino decay, similar to righthanded neutrino decay in the SM sector, may produce leptogenesis. Leptogenesis via neutrino decay was previously proposed in [35]. To verify whether left-handed mirror neutrino decay can effectively induce leptogenesis in this model, we define a parameter K as the deviation from thermal equilibrium as…”

Section: Mirror Neutrino Decaymentioning

confidence: 97%

“…The N 1 is the lightest mirror neutrino if we assume normal ordering. At the tree level, the decay width of the mirror neutrino N 1 is given by [35] Γ…”

Section: Mirror Neutrino Decaymentioning

confidence: 99%

Phenomenology of dark matter and mirror fermions from a left–right mirror model with singlet scalar

Alam¹

2021

J. Phys. G: Nucl. Part. Phys.

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We investigate a left-right mirror model with SU(3)c×SU(2)L×SU(2)R×U(1)Y and a discrete Z2 symmetry, which introduces mirror fields that are copies of the standard model fields. The mirror fields have the opposite chirality to their standard model counterpart fields. We also introduce singlet scalars as dark matter. The new interaction between dark matter, standard model fermions, and mirror fermions can account for dark matter abundance, charged lepton flavor violation, lepton anomalous magnetic moment, and flavor changing neutral current. We demonstrated that if we choose dark matter annihilation into muon as the dominant annihilation channel for leptophilic dark matter, both the observed dark matter abundance and the observed discrepancy between theory and experiment in the muon anomalous magnetic moment can be explained without contradicting the bound derived from charged lepton flavor violating processes. We briefly discuss how mirror fermions will be produced at the future linear collider, as mirror fermions can interact with neutral gauge bosons in this model. Finally, we discuss the lightest mirror neutrino decay mechanism, which will be highly abundant if stable.

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WIMP dark matter in the parity solution to the strong CP problem

Kawamura

Okawa

Omura

et al. 2019

J. High Energ. Phys.

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We extend the Standard Model (SM) with parity symmetry, motivated by the strong CP problem and dark matter. In our model, parity symmetry is conserved at high energy by introducing a mirror sector with the extra gauge symmetry, SU (2) R × U (1) R . The charges of SU (2) R × U (1) R are assigned to the mirror fields in the same way as in the SM, but the chiralities of the mirror fermions are opposite to respect the parity symmetry. The strong CP problem is resolved, since the mirror quarks are also charged under the SU (3) c in the SM. In the minimal setup, the mirror gauge symmetry leads to stable colored particles which would be inconsistent with the observed data, so that we introduce two scalars in order to deplete the stable colored particles. Interestingly, one of the scalars becomes stable because of the gauge symmetry and therefore can be a good dark matter candidate. We especially study the phenomenology relevant to the dark matter, i.e. thermal relic density, direct and indirect searches for the dark matter. The bounds from the LHC experiment and the Landau pole are also taken into account. As a result, we find that a limited region is viable: the mirror up quark mass is around [600 GeV, 3 TeV] and the relative mass difference between the dark matter and the mirror up quark or electron is about O(1-10 %). We also discuss the neutrino sector and show that the right-handed neutrinos in the mirror sector can increase the effective number of neutrinos or dark radiation by 0.14.

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Spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by Majorana neutrino mass matrix

Cited by 4 publications

References 83 publications

A Right-handed neutrino portal to the hidden sector: active neutrinos and their twins in an F-theory model

A Right-handed neutrino portal to the hidden sector: active neutrinos and their twins in an F-theory model

Phenomenology of dark matter and mirror fermions from a left–right mirror model with singlet scalar

WIMP dark matter in the parity solution to the strong CP problem

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