Dark energy and neutrino CPT-violation

Gu, Ping; Bi, Xiao-Jun; Zhang, Xinmin

doi:10.1140/epjc/s10052-007-0217-7

Cited by 11 publications

(20 citation statements)

References 66 publications

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“…We will consider spontaneous violations of Lorentz symmetry, which arise by adding terms to the Lagrangian which couple a new �eld to neutrino bilinears. e couplings and the new �eld are similar to those introduced in the neutrino dark energy model of [20], and to a large extent to those in the earlier models of [42,43], although we do not demand that the additional �eld actually provides the observed dark energy. e �eld acquires a �E� due to interactions with the Earth, which spontaneously breaks the Lorentz symmetry.…”

Section: Neutrino Coupling and Dispersion Relationssupporting

confidence: 54%

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Neutrino Dispersion Relations from a Dark Energy Model

Ciuffoli

Evslin

Liu

et al. 2013

ISRN High Energy Physics

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We consider a model in which the neutrino is kinetically coupled to a scalar �eld and study its implications for environmentally dependent neutrino velocities. Following the usual effective �eld theory logic, this coupling is expected to arise in neutrino dark energy models. It leads to a Lorent� violation in the neutrino sector. e coupling of the scalar �eld to the stress tensor of the Earth yields terrestrial neutrino dispersion relations distinct from those in interstellar space.

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Section: Neutrino Coupling and Dispersion Relationssupporting

confidence: 54%

“…More complicated breaking models, such as the coupling to sterile neutrinos [11,42,43] and supersymmetric completions [11], are able to push these effects onto higher derivative operators. However, generically this merely increases the exponent of the suppression.…”

Section: Electron Superluminalitymentioning

confidence: 99%

Neutrino Dispersion Relations from a Dark Energy Model

Ciuffoli

Evslin

Liu

et al. 2013

ISRN High Energy Physics

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“…1 The coupling engenders an additional source for neutrino mixing (e.g., Ref. [10]), resulting in neutrino oscillations with a different energy dependence than vacuum oscillations and different oscillation probabilities for neutrinos and antineutrinos. While similar Lorentz/CPT-violating oscillations have been considered before [11,12,13], we emphasize here that cosmic acceleration dictates a specific form for such effects.…”

Section: Introductionmentioning

confidence: 99%

Neutrino oscillations,Lorentz/CPTviolation, and dark energy

2009

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If dark energy (DE) couples to neutrinos, then there may be apparent violations of Lorentz/CPT invariance in neutrino oscillations. The DE-induced Lorentz/CPT violation takes a specific form that introduces neutrino oscillations that are energy independent, differ for particles and antiparticles, and can lead to novel effects for neutrinos propagating through matter. We show that ultra-high-energy neutrinos may provide one avenue to seek this type of Lorentz/CPT violation in νµ-ντ oscillations, improving the current sensitivity to such effects by seven orders of magnitude. Lorentz/CPT violation in electron-neutrino oscillations may be probed with the zenith-angle dependence for high-energy atmospheric neutrinos. The "smoking gun," for DE-neutrino coupling would, however, be a dependence of neutrino oscillations on the direction of the neutrino momentum relative to our peculiar velocity with respect to the CMB rest frame. While the amplitude of this directional dependence is expected to be small, it may nevertheless be worth seeking in current data and may be a target for future neutrino experiments.PACS numbers: 95.36.+x, 95.85.Ry, 14.60.Pq, 11.30.Er

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“…Many articles have treated neutrino oscillation via the MaVaN mechanism [14][15][16][17][18][19][20][21][22]. We observe, nevertheless, that these articles focus on solar and atmospheric neutrinos, as well as observations from accelerators and reactors.…”

Section: Introductionmentioning

confidence: 85%

Mass varying neutrinos in supernovae

et al. 2011

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We study the consequences on the neutrino oscillation parameter space, mixing angle (tan 2 ), and vacuum mass difference (Ám 2 0 ) when mass varying neutrino (MaVaN) models are assumed in a supernova environment. We consider electronic to sterile channels e ! s and " e ! " s in two-flavor scenario. In a given model of MaVaN mechanism, we induce a position-dependent effective mass difference, Ám 2 ðrÞ, where r is the distance from the supernova core, that changes the neutrino and antineutrino flavor conversion probabilities. We study the constraints on the mixing angle and vacuum mass difference coming from r-process and the SN1987A data. Our result is the appearance of a new exclusion region for very small mixing angles, tan 2 ¼ 10 À6 -10 À2 , and small vacuum mass difference, Ám 2 0 ¼ 1-20 eV 2 , due the MaVaN mechanism.

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Dark energy and neutrino CPT-violation

Cited by 11 publications

References 66 publications

Neutrino Dispersion Relations from a Dark Energy Model

Neutrino Dispersion Relations from a Dark Energy Model

Neutrino oscillations,Lorentz/CPTviolation, and dark energy

Mass varying neutrinos in supernovae

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