Supernova constraints on massive (pseudo)scalar coupling to neutrinos

Heurtier, Lucien; Zhang, Yongchao

doi:10.1088/1475-7516/2017/02/042

Cited by 77 publications

(99 citation statements)

References 165 publications

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“…The analysis of Ref. [26] found that for 1 MeV ≲ m ϕ ≲ 100 MeV, values of λ αβ between 10 −12 to 10 −6 are excluded, for α, β ¼ e, μ. For larger couplings, the ϕ particles are reabsorbed by the supernova and no longer affect its cooling.…”

Section: G Supernova 1987amentioning

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: G Supernova 1987amentioning

confidence: 99%

Lepton-number-charged scalars and neutrino beamstrahlung

Berryman¹,

Gouvêa²,

Kelly³

et al. 2018

Phys. Rev. D

115

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“…The discovery of such a mode would therefore strongly hint at a more complicated majoron realization. Due to the small Jνν coupling, supernova constraints are also easily evaded [105].…”

Section: Jhep05(2017)102mentioning

confidence: 99%

Neutrino lines from majoron dark matter

Garcia-Cely

Heeck

2017

J. High Energ. Phys.

105

151

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Models with spontaneously broken global lepton number can lead to a pseudoGoldstone boson as a long-lived dark matter candidate. Here we revisit the case of singlet majoron dark matter and discuss multiple constraints. For masses above MeV, this model could lead to a detectable flux of monochromatic mass-eigenstate neutrinos, which have flavor ratios that depend strongly on the neutrino mass hierarchy. We provide a convenient parametrization for the loop-induced majoron couplings to charged fermions that allows us to discuss three-generation effects such as lepton flavor violation. These couplings are independent of the low-energy neutrino parameters but can be constrained by the majoron decays into charged fermions.

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“…For a TeV scale N , the mixing V νN ∼ 10 −6 , and we are then safe from the Majoron limits from supernova observations [65] and other astrophysical and terrestrial constraints [66,67]. Here we assume this to be the case.…”

Section: Global U(1) B−l Modelmentioning

confidence: 99%

Leptogenesis constraints on B − L breaking Higgs boson in TeV scale seesaw models

Dev¹,

Mohapatra

2018

J. High Energ. Phys.

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In the type-I seesaw mechanism for neutrino masses, there exists a B − L symmetry, whose breaking leads to the lepton number violating mass of the heavy Majorana neutrinos. This would imply the existence of a new neutral scalar associated with the B −L symmetry breaking, analogous to the Higgs boson of the Standard Model. If in such models, the heavy neutrino decays are also responsible for the observed baryon asymmetry of the universe via the leptogenesis mechanism, the new seesaw scalar interactions with the heavy neutrinos will induce additional dilution terms for the heavy neutrino and lepton number densities. We make a detailed study of this dilution effect on the lepton asymmetry in three generic classes of seesaw models with TeV-scale B − L symmetry breaking, namely, in an effective theory framework and in scenarios with global or local U(1) B−L symmetry. We find that requiring successful leptogenesis imposes stringent constraints on the mass and couplings of the new scalar in all three cases, especially when it is lighter than the heavy neutrinos. We also discuss the implications of these new constraints and prospects of testing leptogenesis in presence of seesaw scalars at colliders.

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Supernova constraints on massive (pseudo)scalar coupling to neutrinos

Cited by 77 publications

References 165 publications

Lepton-number-charged scalars and neutrino beamstrahlung

Lepton-number-charged scalars and neutrino beamstrahlung

Neutrino lines from majoron dark matter

Leptogenesis constraints on B − L breaking Higgs boson in TeV scale seesaw models

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