Scalar dark matter search from the extended νTHDM

Baek, Seungwon; Das, Arindam; Nomura, Takaaki

doi:10.1007/jhep05(2018)205

Cited by 7 publications

(5 citation statements)

References 34 publications

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“…The tiny VEV v 1 necessary to explain neutrino mass can be generated by seesaw-like relation in which the high-energy scale is the electroweak scale [2,3]. The scalar S which is a SM-singlet but charged under U (1) X breaks the global symmetry spontaneously, and can couple to an electroweak-scale WIMP dark matter which is stabilized by a remnant discrete symmetry [3,4].…”

Section: Introductionmentioning

confidence: 99%

Dirac neutrino from the breaking of Peccei-Quinn symmetry

Baek

2020

Physics Letters B

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We propose a model where Dirac neutrino mass is obtained from small vacuum expectation value (VEV) of neutrino-specific Higgs doublet without fine-tuning problem. The small VEV results from a seesaw-like formula with the high energy scale identified as the Peccei-Quinn (PQ) symmetry breaking scale. Axion can be introducedà la KSVZ or DFSZ. The model suggests neutrino mass, solution to the strong CP problem, and dark matter may be mutually interconnected.

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Section: Introductionmentioning

confidence: 99%

Dirac neutrino from the breaking of Peccei-Quinn symmetry

Baek

2020

Physics Letters B

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“…We have considered a minimal model which can address the above hints simultaneously. The neutrino mass is obtained when neutrino-specific Higgs-doublet gets a VEV, v 1 [1][2][3]. The value v 1 is due to the breaking of the PQ symmetry as shown in figure 1, is related to the high energy scale via seesaw-like relation (3.20), and is naturally small.…”

Section: Discussionmentioning

confidence: 99%

“…In the model two Higgs doublets are introduced, the SM-like Higgs doublet (Φ 2 ) couples to the quarks and charged leptons, whereas the new Higgs doublet (Φ 1 ) couples solely to the neutrino sector. In this neutrino-specific two Higgs doublet model (νTHDM), the Higgs Φ 1 and the right-handed neutrinos ν i R (i = 1, 2, 3) as well as S whose phase is the main component of the axion are charged under the PQ symmetry [2,3]. The PQ symmetry prohibits the right-handed neutrino from having mass term, making the type-I seesaw mechanism not effective.…”

Section: Introductionmentioning

confidence: 99%

A connection between flavour anomaly, neutrino mass, and axion

Baek

2020

J. High Energ. Phys.

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We propose a minimal model in which the flavour anomaly in the b → sμ+μ− transition is connected to the breaking of Peccei-Quinn (PQ) symmetry. The flavour anomaly is explained from new physics contribution by introducing one generation of heavy quark and heavy lepton which are vector-like under the standard model (SM) gauge group but charged under a local U(1)X group. They mix with the SM quarks and leptons, inducing flavour-changing Z′ couplings, which generates the b → sμ+μ− anomaly at tree level. On the other hand the new fermions are chiral under the global Peccei-Quinn(PQ) symmetry. The pseudo-Goldstone boson coming from the spontaneous breaking of the PQ symmetry becomes an axion, solving the strong CP problem and providing a cold dark matter candidate. The same symmetry prevents the right-handed neutrino from having a Majorana mass term. But the introduction of a neutrino-specific Higgs doublet allows neutrino to have Dirac mass term without fine-tuning problem. The model shows an interplay between axion, neutrino, dark matter, and flavour physics.

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“…We have considered a minimal model which can address the above hints simultaneously. The neutrino mass is obtained when neutrino-specific Higgs-doublet gets a VEV, v 1 [1][2][3]. The value v 1 is due to the breaking of the PQ symmetry as shown in Figure 1, is related to the high energy scale via seesaw-like relation (3.16), and is naturally small.…”

Section: Discussionmentioning

confidence: 99%

A connection between flavour anomaly, neutrino mass, and axion

Baek

2020

Preprint

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We propose a minimal model in which the flavour anomaly in the b → sµ + µ − transition is connected to the breaking of Peccei-Quinn (PQ) symmetry. The flavour anomaly is explained from new physics contribution by introducing one generation of heavy quark and heavy lepton which are vector-like under the standard model (SM) gauge group but charged under a local U (1) X group. They mix with the SM quarks and leptons, inducing flavour-changing Z couplings, which generates the b → sµ + µ − anomaly at tree level. On the other hand the new fermions are chiral under the global Peccei-Quinn(PQ) symmetry. The pseudo-Goldstone boson coming from the spontaneous breaking of the PQ symmetry becomes an axion, solving the strong CP problem and providing a cold dark matter candidate. The same symmetry prevents the right-handed neutrino from having a Majorana mass term. But the introduction of a neutrino-specific Higgs doublet allows neutrino to have Dirac mass term without fine-tuning problem. The model shows an interplay between axion, neutrino, dark matter, and flavour physics.

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Scalar dark matter search from the extended νTHDM

Cited by 7 publications

References 34 publications

Dirac neutrino from the breaking of Peccei-Quinn symmetry

Dirac neutrino from the breaking of Peccei-Quinn symmetry

A connection between flavour anomaly, neutrino mass, and axion

A connection between flavour anomaly, neutrino mass, and axion

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