Homogeneously Modified Special relativity (HMSR)

Torri, Marco Danilo Claudio; Antonelli, Vito; Miramonti, L.

doi:10.1140/epjc/s10052-019-7301-7

Cited by 22 publications

(42 citation statements)

References 38 publications

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“…The metric homogeneity allows neglecting the metric derivative by the momentum, since this term is a second order perturbation [49]. HMSR introduces therefore a simple way of inverting the correspondence between four momentum and four velocity.…”

Section: Mdr(p)mentioning

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: Mdr(p)mentioning

confidence: 99%

Neutrino Oscillations and Lorentz Invariance Violation

Torri

2020

Universe

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“…In a recently proposed model [86,87], denoted ad HMSR (Homogeneously Modified Special Relativity), some sources of LIV are introduced, starting from the modification of the energy-momentum dispersion relation, with a geometrical origin (by using the Finsler geometry) and in such a way to preserve the space time isotropy and build an isotropic CPT conserving extension of the Standard Model. Therefore, the potential experimental effects induced by this kind of LIV would be represented by isotropic corrections to the usual known phenomenology.…”

Section: Search For LIV Signals and Other Exotic Studies At Junomentioning

confidence: 99%

Present and Future Contributions of Reactor Experiments to Mass Ordering and Neutrino Oscillation Studies

Antonelli¹,

Miramonti²,

Ranucci³

2020

Preprint

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After a long a glorious history, marked by the first direct proofs of neutrino existence and of the mixing between the first and third neutrino generations, the reactor antineutrino experiments are still well alive and will continue to give important contributions to the development of elementary particle physics and astrophysics. In parallel to the SBL experiments, that will be dedicated mainly to the search for sterile neutrinos, a new kind of experiments will start playing an important role: the medium baseline reactor experiments, aiming to study the neutrino mass ordering. The first example of this kind, the liquid scintillator JUNO experiment, characterized by a very high mass and unprecedented energy resolution, will soon start data taking in China. Its main aspects are discussed here, together with its potentialities for what concerns the mass ordering investigation and also the other issues that can be studied with this detector, spanning from the accurate oscillation parameter determination, to the study of solar neutrinos, geoneutrinos, atmospheric neutrinos and neutrinos emitted by supernovas and to the search for signals of potential Lorentz invariance violation.

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“…True to the idea of small violations at low energy, the theory is developed in the form of an effective quantum field theory called the Standard-Model Extension (SME), based on the SM [7][8][9][10][11]36,37] and GR [38][39][40][41][42][43][44][45][46][47]. The fundamentals of the extension have been theoretically developed for spontaneous and explicit symmetry breaking for various space-time metrics [25,[48][49][50][51][52][53][54][55][56][57][58].…”

Section: Introductionmentioning

confidence: 99%

Astrophysical Neutrinos in Testing Lorentz Symmetry

Roberts

2021

Galaxies

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An overview of searches related to neutrinos of astronomical and astrophysical origin performed within the framework of the Standard-Model Extension is provided. For this effective field theory, key definitions, intriguing physical consequences, and the mathematical formalism are summarized within the neutrino sector to search for effects from a background that could lead to small deviations from Lorentz symmetry. After an introduction to the fundamental theory, examples of various experiments within the astronomical and astrophysical context are provided. Order-of-magnitude bounds of SME coefficients are shown illustratively for the tight constraints that this sector allows us to place on such violations.

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Homogeneously Modified Special relativity (HMSR)

Cited by 22 publications

References 38 publications

Neutrino Oscillations and Lorentz Invariance Violation

Neutrino Oscillations and Lorentz Invariance Violation

Present and Future Contributions of Reactor Experiments to Mass Ordering and Neutrino Oscillation Studies

Astrophysical Neutrinos in Testing Lorentz Symmetry

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