Bounds on neutrino-scalar Yukawa coupling

Pasquini, Pedro; Peres, O. L. G.

doi:10.1103/physrevd.93.053007

Cited by 68 publications

(59 citation statements)

References 39 publications

(68 reference statements)

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“…If m ϕ is smaller than one GeV there are strong constraints from the decays of charged pseudoscalar mesons [19]. In particular, the decay rate associated with ϕ emission (the ϕ is radiated from the final-state neutrino) is not proportional to the well-known helicity-suppression factor associated with two-body leptonic decays of charged pseudoscalars.…”

Section: Charged Meson Decaysmentioning

confidence: 99%

Lepton-number-charged scalars and neutrino beamstrahlung

Berryman¹,

Gouvêa²,

Kelly³

et al. 2018

Phys. Rev. D

115

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Experimentally, baryon number minus lepton number, B − L, appears to be a good global symmetry of nature. We explore the consequences of the existence of gauge-singlet scalar fields charged under B − Ldubbed lepton-number-charged scalars (LeNCSs)-and postulate that these couple to the standard model degrees of freedom in such a way that B − L is conserved even at the nonrenormalizable level. In this framework, neutrinos are Dirac fermions. Including only the lowest mass-dimension effective operators, some of the LeNCSs couple predominantly to neutrinos and may be produced in terrestrial neutrino experiments. We examine several existing constraints from particle physics, astrophysics, and cosmology to the existence of a LeNCS carrying B − L charge equal to two, and discuss the emission of LeNCSs via "neutrino beamstrahlung," which occurs every once in a while when neutrinos scatter off of ordinary matter. We identify regions of the parameter space where existing and future neutrino experiments, including the Deep Underground Neutrino Experiment, are at the frontier of searches for such new phenomena.

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Section: Charged Meson Decaysmentioning

confidence: 99%

Lepton-number-charged scalars and neutrino beamstrahlung

Berryman¹,

Gouvêa²,

Kelly³

et al. 2018

Phys. Rev. D

115

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“…(21) cannot be applied to model E, since the 1/m 2 Z enhancement of the decay rate would not be present. Limits applicable to model A from decays of light mesons have been provided in [45] (see also [46,47]). For our analysis we will adopt the constraint g νJ < 4.4 × 10 −5 , independent on the mass of the pseudoscalar J for the whole range of masses considered in this work.…”

Section: Additional Bounds On Light Statesmentioning

confidence: 99%

“…Model A: ig νJν γ 5 ν J Double β decay (only LNV) g νJ 10 −(4÷5)[53,54] Meson decays g νJ 4.4 × 10 −5[45] CMB g νJ 1.2 × 10 −2 m J Le (ν e γ µ P L ν e +ēγ µ e) Z µ…”

mentioning

confidence: 99%

Tritium beta decay with additional emission of new light bosons

Arcadi

Heeck

Heizmann

et al. 2019

J. High Energ. Phys.

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We consider tritium beta decay with additional emission of light pseudoscalar or vector bosons coupling to electrons or neutrinos. The electron energy spectrum for all cases is evaluated and shown to be well estimated by approximated analytical expressions. We give the statistical sensitivity of Katrin to the mass and coupling of the new bosons, both in the standard setup of the experiment as well as for future modifications in which the full energy spectrum of tritium decay is accessible.

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“…Constraints on the properties and interactions of such scalar particles as well as their possible effects have been studied in the context of particle physics, astrophysics, and cosmology [1,2,3,4,5,6,7,8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Neutrino damping in a fermion and scalar background

Nieves

Sahu

2019

Phys. Rev. D

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We consider the propagation of a neutrino in a background composed of a scalar particle and a fermion using a simple model for the coupling of the form λfRνLφ. In the presence of these interactions there can be damping terms in the neutrino effective potential and index of refraction. We calculate the imaginary part of the neutrino self-energy in this case, from which the damping terms are determined. The results are useful in the context of Dark Matter-neutrino interaction models in which the scalar and/or fermion constitute the dark-matter. The corresponding formulas for models in which the scalar particle couples to two neutrinos via a coupling of the form λ (ννφ)ν c R νLφ are then obtained as a special case, which can be important also in the context of neutrino collective oscillations in a supernova and in the Early Universe hot plasma before neutrino decoupling. A particular feature of our results is that the damping term in a νφ background is independent of the antineutrino-neutrino asymmetry in the background. Therefore, the relative importance of the damping term may be more significant if the neutrino-antineutrino asymmetry in the background is small, because the leading Z-exchange and φ-exchange contributions to the effective potential, which are proportional to the neutrino-antineutrino asymmetry, are suppressed in that case, while the damping term is not.

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Bounds on neutrino-scalar Yukawa coupling

Cited by 68 publications

References 39 publications

Lepton-number-charged scalars and neutrino beamstrahlung

Lepton-number-charged scalars and neutrino beamstrahlung

Tritium beta decay with additional emission of new light bosons

Neutrino damping in a fermion and scalar background

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