Decoherence in neutrino propagation through matter, and bounds from IceCube/DeepCore

Coloma, Pilar; Martinez-Soler, Ivan; López‐Pavón, Jacobo; Nunokawa, Hiroshi

doi:10.1140/epjc/s10052-018-6092-6

Cited by 55 publications

(60 citation statements)

References 45 publications

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“…This result is in itself important in the context of recent studies that have explored the possible energy dependence of the decoherence terms, but from a phenomenological point of view (e.g., Refs. [10,11,14,17]).…”

Section: Examples and Discussionmentioning

confidence: 99%

“…Decoherence effects, in the framework of open systems or the Linblad equation, have been considered in the recent neutrino physics literature in a variety of contexts [10,11,12,13], and in specific settings such as IceCube [14], DUNE [15], and long base line experiments [16,17]. It has also been considered for their possible relevance in connection with quantum gravitational effects [18], and the question of CP T symmetry and the Dirac vs Majorana nature of neutrinos [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…Some of these works have explored the dependence of the decoherence terms on the neutrino energy (e.g., Refs. [10,11,14,17]), but they have been based on general considerations at a phenomenological level of the decoherence terms, without a precise calculation of them.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Neutrino decoherence in a fermion and scalar background

Nieves

Sahu

2019

Phys. Rev. D

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We consider the decoherence effects in the propagation of active neutrinos due to the non-forward neutrino scattering processes in a matter background composed of electrons and nucleons. We calculate the contribution to the imaginary part of the neutrino self-energy arising from such processes. Since the initial neutrino state is depleted but does not actually disappear (the initial neutrino transitions into a neutrino of a different flavor but does not decay) those processes should be associated with decoherence effects that cannot be described in terms of the coherent evolution of the state vector. Based on the formalism developed in previous work for treating the non-forward scattering processes using the notion of the stochastic evolution of the state, we identify the jump operators, as used in the context of the master or Linblad equation, in terms of the results of the the calculation of the non-forward neutrino scattering contribution to the imaginary part of the neutrino self-energy. As a guide to estimating the decoherence effects in situations of practical interest we give explicit formulas for the jump operators for different background conditions, and point out some of the salient features in particular the neutrino energy dependence. The results can be useful for long baseline experiments, where matter effects are important, and can also serve to guide the generalizations to other situations in which the decoherence effects in the propagation of neutrinos due to the non-forward scattering processes may be important.

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Section: Examples and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Neutrino decoherence in a fermion and scalar background

Nieves

Sahu

2019

Phys. Rev. D

View full text Add to dashboard Cite

show abstract

“…Decoherence effects, in the framework of open systems or the Lindblad equation, have been considered in the recent neutrino physics literature in a variety of contexts [10][11][12][13][14], and in specific settings such as IceCube [15], DUNE [16], and long base line experiments [17,18]. It has also been considered for their possible relevance in connection with quantum gravitational effects [19], and the question of CPT symmetry and the Dirac vs Majorana nature of neutrinos [20,21].…”

Section: Introductionmentioning

confidence: 99%

“…Some of these works have explored the dependence of the decoherence terms on the neutrino energy (e.g., Refs. [10,11,15,18]), but they have been based on general considerations at a phenomenological level of the decoherence terms, without a precise calculation of them.…”

Section: Introductionmentioning

confidence: 99%

Neutrino decoherence in an electron and nucleon background

Nieves

Sahu

2020

Phys. Rev. D

View full text Add to dashboard Cite

We consider the decoherence effects in the propagation of active neutrinos due to the nonforward neutrino scattering processes in a matter background composed of electrons and nucleons. We calculate the contribution to the imaginary part of the neutrino self-energy arising from such processes. Since the initial neutrino state is depleted but does not actually disappear (the initial neutrino transitions into a neutrino of a different flavor but does not decay) those processes should be associated with decoherence effects that cannot be described in terms of the coherent evolution of the state vector. Based on the formalism developed in our previous work for treating the nonforward scattering processes using the notion of the stochastic evolution of the state, we identify the jump operators, as used in the context of the master or Lindblad equation, in terms of the results of the calculation of the nonforward neutrino scattering contribution to the imaginary part of the neutrino self-energy. As a guide to estimating the decoherence effects in situations of practical interest we give explicit formulas for the decoherence terms for different background conditions, and point out some of the salient features in particular the neutrino energy dependence. To establish contact with previous works in which the decoherence terms are treated as phenomenological parameters, we consider the solution to the evolution equation in the two-generation case. We give formulas that are useful for estimating the effects of the decoherence terms under various conditions and environments, including the typical conditions applicable to long baseline experiments, where matter effects are important. In those contexts the effects appear to be small, and indicative that if significant decoherence effects were to be found they would be due to nonstandard contributions to the decoherence terms.

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Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment

collaboration¹,

Wang²,

Liao³

et al. 2022

J. High Energ. Phys.

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We study damping signatures at the Jiangmen Underground Neutrino Observatory (JUNO), a medium-baseline reactor neutrino oscillation experiment. These damping signatures are motivated by various new physics models, including quantum decoherence, ν3 decay, neutrino absorption, and wave packet decoherence. The phenomenological effects of these models can be characterized by exponential damping factors at the probability level. We assess how well JUNO can constrain these damping parameters and how to disentangle these different damping signatures at JUNO. Compared to current experimental limits, JUNO can significantly improve the limits on τ3/m3 in the ν3 decay model, the width of the neutrino wave packet σx, and the intrinsic relative dispersion of neutrino momentum σrel.

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Decoherence in neutrino propagation through matter, and bounds from IceCube/DeepCore

Cited by 55 publications

References 45 publications

Neutrino decoherence in a fermion and scalar background

Neutrino decoherence in a fermion and scalar background

Neutrino decoherence in an electron and nucleon background

Damping signatures at JUNO, a medium-baseline reactor neutrino oscillation experiment

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