Revisiting the quantum decoherence scenario as an explanation for the LSND anomaly

Bakhti, Pouya; Farzan, Yasaman; Schwetz, Thomas

doi:10.1007/jhep05(2015)007

Cited by 31 publications

(37 citation statements)

References 70 publications

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“…(6) and (7) as being a constant parameter with energy dimension. In general, a power-law dependence for the parameter can be defined as an ansatz [20,46] where each power could have a relation with a particular physical mechanism. 1 In the literature there are no any analyses at all from experiments using the dissipative model for three-neutrino oscillations presented in this section.…”

Section: Quantum Dissipatorsmentioning

confidence: 99%

Dissipative effect in long baseline neutrino experiments

Oliveira

2016

Eur. Phys. J. C

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The propagation of neutrinos in long baselines experiments may be influenced by dissipation effects. Using the Lindblad master equation we evolve neutrinos taking into account these dissipative effects. The MSW and the dissipative effects may change the behavior of the probabilities. In this work, we show and explain how the behavior of the probabilities can change due to the decoherence and relaxation effects acting individually with the MSW effect. A new exotic peak appears in this case and we show the difference between the decoherence and relaxation effects in the appearance of this peak. We also adapt the usual approximate expression for survival and appearance probabilities with all possible decoherence effects. We suppose the baseline of DUNE and show how each of the decoherence parameters changes the probabilities analyzing the possible modification using a numeric and an analytic approach.

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Section: Quantum Dissipatorsmentioning

confidence: 99%

Dissipative effect in long baseline neutrino experiments

Oliveira

2016

Eur. Phys. J. C

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“…In this work we study one of the possible windows to NP, the so-called quantum decoherence in neutrino oscillations, and update the existing bounds by analyzing IceCube and DeepCore data on atmospheric neutrinos. In particular, we are interested in a kind of decoherence effects in neutrino oscillations studied, for example, in [6][7][8][9][10][11][12][13] and, more recently, in [14][15][16][17][18][19]. These decoherence effects differ from the standard decoherence caused by the separation of wave packets (see e.g.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2018

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We revisit neutrino oscillations in matter considering the open quantum system framework, which allows to introduce possible decoherence effects generated by New Physics in a phenomenological manner. We assume that the decoherence parameters γ i j may depend on the neutrino energy, asThe case of non-uniform matter is studied in detail and, in particular, we develop a consistent formalism to study the nonadiabatic case dividing the matter profile into an arbitrary number of layers of constant densities. This formalism is then applied to explore the sensitivity of IceCube and DeepCore to this type of effects. Our study is the first atmospheric neutrino analysis where a consistent treatment of the matter effects in the three-neutrino case is performed in presence of decoherence. We show that matter effects are indeed extremely relevant in this context. We find that IceCube is able to considerably improve over current bounds in the solar sector (γ 21 ) and in the atmospheric sector (γ 31 and γ 32 ) for n = 0, 1, 2 and, in particular, by several orders of magnitude (between 3 and 9) for the n = 1, 2 cases. For n = 0 we find γ 32 , γ 31 < 4.0 × 10 −24 (1.3 × 10 −24 ) GeV and γ 21 < 1.3 × 10 −24 (4.1 × 10 −24 ) GeV at the 95% CL, for normal (inverted) mass ordering.

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“…In [28] an exponential dependence of the decoherence pa- rameters on neutrino energy was conjectured to be…”

Section: Measures Of Coherence and Mixednessmentioning

confidence: 99%

Study of coherence and mixedness in meson and neutrino systems

et al. 2019

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We study the interplay between coherence and mixedness in meson and neutrino systems. The dynamics of the meson system is treated using the open quantum system approach taking into account the decaying nature of the system. Neutrino dynamics is studied in the context of three flavor oscillations within the framework of a decoherence model recently used in the context of LSND (Liquid Scintillator Neutrino Detector) experiment. For meson systems, the decoherence effect is negligible in the limit of zero CP violation. Interestingly, the average mixedness increases with time for about one lifetime of these particles. For neutrino system, in the context of the model considered, the decoherence effect is maximum for neutrino energy around 30 MeV. Further, the effect of CP violating phase is found to decrease (increase) the coherence in the upper 0 < δ < π (lower π < δ < 2π) half plane.

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Revisiting the quantum decoherence scenario as an explanation for the LSND anomaly

Cited by 31 publications

References 70 publications

Dissipative effect in long baseline neutrino experiments

Dissipative effect in long baseline neutrino experiments

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

Study of coherence and mixedness in meson and neutrino systems

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