Leptonic flavor structure in the brane shifted extra dimensional seesaw mechanism

Becker, M.; Päs, Heinrich

doi:10.1140/epjc/s10052-018-5756-6

Cited by 3 publications

(8 citation statements)

References 18 publications

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“…In the last two decades, the paradigm underlying the observable Universe as a 3-brane, embedded in a higher-dimensional spacetime, has become a fruitful scenario for addressing several questions in physics, that cover a comprehensive plethora of phenomena, ranging from low energy physics [1][2][3][4], gravity [5][6][7][8][9], astrophysics [10][11][12][13], and high energy physics [14][15][16][17][18] to cosmology [19][20][21][22][23]. Regarding some prominent cases, the braneworld paradigm leads to plausible reformulations or even complete solutions of these problems (see Refs.…”

Section: Introductionmentioning

confidence: 99%

A de Sitter tachyonic braneworld revisited

Barbosa-Cendejas

Cartas-Fuentevilla

Herrera–Aguilar

et al. 2018

J. Cosmol. Astropart. Phys.

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Abstract. Within the framework of braneworlds, several interesting physical effects can be described in a wide range of energy scales, starting from high-energy physics to cosmology and low-energy physics. An usual way to generate a thick braneworld model relies in coupling a bulk scalar field to higher dimensional warped gravity. Quite recently, a novel braneworld was generated with the aid of a tachyonic bulk scalar field, having several remarkable properties. It comprises a regular and stable solution that contains a relevant 3-brane with de Sitter induced metric, arising as an exact solution to the 5D field equations, describing the inflationary eras of our Universe. Besides, it is asymptotically flat, despite of the presence of a negative 5D cosmological constant, which is an interesting feature that contrasts with most of the known, asymptotically either dS or AdS models. Moreover, it encompasses a graviton spectrum with a single massless bound state, accounting for 4D gravity localized on the brane, separated from the continuum of Kaluza-Klein massive graviton modes by a mass gap that makes the 5D corrections to Newton's law to decay exponentially. Finally, gauge, scalar and fermion fields are also shown to be localized on this braneworld. In this work, we show that this tachyonic braneworld allows for a nontrivial solution with a vanishing 5D cosmological constant that preserves all the above mentioned remarkable properties with a less amount of parameters, constituting an important contribution to the construction of a realistic cosmological braneworld model. arXiv:1709.09016v1 [hep-th]

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Section: Introductionmentioning

confidence: 99%

A de Sitter tachyonic braneworld revisited

Barbosa-Cendejas

Cartas-Fuentevilla

Herrera–Aguilar

et al. 2018

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

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“…(3.6). For guidance, we also overlay excluded boundaries of other experiments derived in [36][37][38][39][40][41][42][43][44][45][46]133]. These results were obtained for 5 kk-modes.…”

Section: Short-baseline Oscillationsmentioning

confidence: 93%

“…Since there is no constraint on the right-handed neutrino masses, any of them within the mass range from sub-eV to the Planck mass can contribute. The light sterile neutrino can be such a candidate which can be decomposed into a tower of kk excitation that can mix with the active neutrinos and therefore affects the standard neutrino oscillations [26][27][28][29][30][31][32][33][34][35][36][37][38][38][39][40][41][42][43][44][45][46].…”

Section: Jhep01(2023)052mentioning

confidence: 99%

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Extra dimensions with light and heavy neutral leptons: an application to CEνNS

Khan

2023

J. High Energ. Phys.

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We explore the possibility of relating extra dimensions with light and heavy Dirac-type neutral leptons and develop a framework for testing them in various laboratory experiments. The Kaluza-Klein modes in the large extra dimension models of the light neutral leptons could mix with the standard model neutrinos and produce observable effects in the oscillation experiments. We show that the chirality flipping up-scattering processes occurring through either neutrino magnetic dipole moment or the weakly coupled scalar interactions can also produce heavy Kaluza-Klein modes of the corresponding right-handed neutral leptons propagating in one or more extra dimensions. However, to conserve the four- dimensional energy-momentum, their masses must be below the maximum energy of the neutrinos in the initial state. The appreciable size of extra dimensions connected with these heavy neutral leptons can thus affect the cross-sections of these processes. This framework applies to any up-scattering process. Our work here focuses only on its application to the coherent elastic neutrino-nucleus scattering process. We derive constraints on the size of extra dimensions using the COHERENT data in oscillation and up-scattering processes. For model with one large extra dimension for the light neutral leptons, we obtain the limits, R ~ 3 μm (NH) and R ~ 2.5 μm (IH), on the size of extra dimension corresponding to the absolute mass limit, m0 ≤ 3 × 10−3 eV at 90% C.L. from the short-baseline oscillations. Using the up-scattering process for heavy neutral leptons, we obtain new parameter spaces between the size of extra dimensions and parameters of the dipole or scalar interactions.

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“…For example, such a mechanism could be an extra dimensional model where the right-handed neutrino in contrast to all other particles propagates in an extra dimension since it is uncharged under all considered gauge groups. Thereby, its coupling gets suppressed by the reduced wave function overlap[20,21] …”

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confidence: 99%

Dark matter from freeze-in via the neutrino portal

Becker

2019

Eur. Phys. J. C

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We investigate a minimal neutrino portal dark matter (DM) model where a right-handed neutrino both generates the observed neutrino masses and mediates between the SM and the dark sector, which consists of a fermion and a boson. In contrast to earlier work, we explore regions of the parameter space where DM is produced via freeze-in instead of freezeout motivated by the small neutrino Yukawa couplings in case of O (TeV) heavy neutrinos. For a non-resonant production of DM, its energy density is independent of the DM mass. Assuming a democratic coupling structure we find M N ≈ 10 TeV. For the resonant production of DM, we find that it can be produced via freeze-in or freeze-out even with couplings of O (10 −5 ). However, the measurement of the Lyman-α forest rules out the feeble coupled freezeout case completely, while the resonant freeze-in production is only viable for m DM 3k eV . 1 mathias.becker@tu-dortmund.de arXiv:1806.08579v2 [hep-ph] 3 May 2019 1 A small DM production rate could also be generated by a large mediator mass as was pointed out in [1].

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Leptonic flavor structure in the brane shifted extra dimensional seesaw mechanism

Cited by 3 publications

References 18 publications

A de Sitter tachyonic braneworld revisited

A de Sitter tachyonic braneworld revisited

Extra dimensions with light and heavy neutral leptons: an application to CEνNS

Dark matter from freeze-in via the neutrino portal

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