Neutrino oscillations in extended theories of gravity

Buoninfante, Luca; Luciano, Giuseppe Gaetano; Smaldone, L. A.

doi:10.1103/physrevd.101.024016

Cited by 67 publications

(53 citation statements)

References 173 publications

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“…In fact, it can open another window on the study of fundamental symmetries of nature, presenting another sector where posing Lorentz Invariance under investigation. Finally, neutrino oscillation physics can be used in the future to investigate the validity of alternative gravity theories, i.e., modified General Relativity theories [99,100]. These models indeed introduce a modification of the geometry of space-time, causing kinematical perturbations that can manifest in neutrino oscillation sector.…”

Section: Discussionmentioning

confidence: 99%

Neutrino Oscillations and Lorentz Invariance Violation

Torri

2020

Universe

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This work explores the possibility of resorting to neutrino phenomenology to detect evidence of new physics, caused by the residual signals of the supposed quantum structure of spacetime. In particular, this work investigates the effects on neutrino oscillations and mass hierarchy detection, predicted by models that violate Lorentz invariance, preserving the spacetime isotropy and homogeneity. Neutrino physics is the ideal environment where conducting the search for new “exotic” physics, since the oscillation phenomenon is not included in the original formulation of the minimal Standard Model (SM) of particles. The confirmed observation of the neutrino oscillation phenomenon is, therefore, the first example of physics beyond the SM and can indicate the necessity to resort to new theoretical models. In this work, the hypothesis that the supposed Lorentz Invariance Violation (LIV) perturbations can influence the oscillation pattern is investigated. LIV theories are indeed constructed assuming modified kinematics, caused by the interaction of massive particles with the spacetime background. This means that the dispersion relations are modified, so it appears natural to search for effects caused by LIV in physical phenomena governed by masses, as in the case of neutrino oscillations. In addition, the neutrino oscillation phenomenon is interesting since there are three different mass eigenstates and in a LIV scenario, which preserves isotropy, at least two different species of particle must interact.

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Section: Discussionmentioning

confidence: 99%

Neutrino Oscillations and Lorentz Invariance Violation

Torri

2020

Universe

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“…Before concluding let us emphasize that a detection of C PT violation induced by decoherence effects could be attributed to fluctuations of the space-time [30][31][32][33][34][35][36], thus representing a signature of quantum gravity. Moreover, the studies on neutrino mixing in curved space [51][52][53][54] could be also generalized by including in them the decoherence and dissipation effects here presented. Therefore, our study might open new windows of opportunity to address several open questions in fundamental physics.…”

Section: Discussionmentioning

confidence: 99%

Revealing neutrino nature and CPT violation with decoherence effects

et al. 2020

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We study decoherence effects on mixing among three generations of neutrinos. We show that in presence of a non-diagonal dissipation matrix, both Dirac and Majorana neutrinos can violate the CPT symmetry and the oscillation formulae depend on the parametrization of the mixing matrix. We reveal the CP violation in the transitions preserving the flavor, for a certain form of the dissipator. In particular, for such dissipators, the CP violation affects all the transitions in the case of Majorana neutrinos, unlike Dirac neutrinos which still preserve the CP symmetry in one of the transitions flavor preserving. The precise form of the dissipation matrix is not known a-priori as it depends on the nature of the phenomenon that originates it. However, our theoretical results show that decoherence effects, if exist for neutrinos, could allow to reveal the neutrino nature and to test fundamental symmetries.

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“…Finally, we emphasize that the present formalism might be of some relevance for a deeper understanding of how gravity influences decay processes and neutrino oscillations [21,22,23,24,25,26,27]. Although a more rigorous curved-spacetime calculation is required to address these situations, the present study may provide a good approximation in the case of moderate gravitational field, for which one can naively treat the decaying particle as being accelerated in flat spacetime.…”

Section: Pos(corfu2019)033mentioning

confidence: 99%

On the very nature of neutrinos: the $\beta$-decay as a test bench

Luciano¹

2020

Proceedings of Corfu Summer Institute 2019 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2019)

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Neutrino oscillations in extended theories of gravity

Cited by 67 publications

References 173 publications

Neutrino Oscillations and Lorentz Invariance Violation

Neutrino Oscillations and Lorentz Invariance Violation

Revealing neutrino nature and CPT violation with decoherence effects

On the very nature of neutrinos: the $\beta$-decay as a test bench

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