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Title: Probing nonstandard neutrino cosmology with terrestrial neutrino experiments

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Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 95; Journal Issue: 11; Related Information: CHORUS Timestamp: 2017-06-30 22:11:33; Journal ID: ISSN 2470-0010
American Physical Society
Country of Publication:
United States

Citation Formats

Ghalsasi, Akshay, McKeen, David, and Nelson, Ann E. Probing nonstandard neutrino cosmology with terrestrial neutrino experiments. United States: N. p., 2017. Web. doi:10.1103/PhysRevD.95.115039.
Ghalsasi, Akshay, McKeen, David, & Nelson, Ann E. Probing nonstandard neutrino cosmology with terrestrial neutrino experiments. United States. doi:10.1103/PhysRevD.95.115039.
Ghalsasi, Akshay, McKeen, David, and Nelson, Ann E. Fri . "Probing nonstandard neutrino cosmology with terrestrial neutrino experiments". United States. doi:10.1103/PhysRevD.95.115039.
title = {Probing nonstandard neutrino cosmology with terrestrial neutrino experiments},
author = {Ghalsasi, Akshay and McKeen, David and Nelson, Ann E.},
abstractNote = {},
doi = {10.1103/PhysRevD.95.115039},
journal = {Physical Review D},
number = 11,
volume = 95,
place = {United States},
year = {Fri Jun 30 00:00:00 EDT 2017},
month = {Fri Jun 30 00:00:00 EDT 2017}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on June 30, 2018
Publisher's Accepted Manuscript

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Cited by: 1work
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  • We analyze the possibility of probing nonstandard neutrino interactions (NSI, for short) through the detection of neutrinos produced in a future galactic supernova (SN). We consider the effect of NSI on the neutrino propagation through the SN envelope within a three-neutrino framework, paying special attention to the inclusion of NSI-induced resonant conversions, which may take place in the most deleptonized inner layers. We study the possibility of detecting NSI effects in a Megaton water Cherenkov detector, either through modulation effects in the {nu}{sub e} spectrum due to (i) the passage of shock waves through the SN envelope, (ii) the timemore » dependence of the electron fraction, and (iii) the Earth matter effects; or, finally, through the possible detectability of the neutronization {nu}{sub e} burst. We find that the {nu}{sub e} spectrum can exhibit dramatic features due to the internal NSI-induced resonant conversion. This occurs for nonuniversal NSI strengths of a few %, and for very small flavor-changing NSI above a fewx10{sup -5}.« less
  • The Kamioka-Korea two-detector system is a powerful experimental setup for resolving neutrino parameter degeneracies and probing CP violation in neutrino oscillation. In this paper, we study sensitivities of the same setup to several nonstandard neutrino physics such as quantum decoherence, tiny violation of Lorentz symmetry, and nonstandard interactions of neutrinos with matter. We show that it can achieve significant improvement on the current bounds on nonstandard neutrino physics. In most cases, the Kamioka-Korea two-detector setup is more sensitive than the one-detector setup, either in Kamioka or in Korea, except for the cases when Lorentz symmetry is broken in a CPT-violatingmore » manner and the nonstandard neutrino interactions with matter is present.« less
  • Most neutrino mass extensions of the standard electroweak model entail nonstandard interactions which, in the low-energy limit, can be parametrized in term of effective four-fermion operators {nu}{sub {alpha}}{nu}{sub {beta}}ff. Typically of subweak strength {epsilon}{sub {alpha}}{sub {beta}}G{sub F}, these are characterized by dimensionless coupling parameters {epsilon}{sub {alpha}}{sub {beta}}, which may be relatively sizable in a wide class of schemes. Here we focus on nonuniversal flavor-conserving couplings ({alpha}={beta}) with electrons (f=e) and analyze their impact on the phenomenology of solar neutrinos. We consistently take into account their effect both at the level of propagation, where they modify the standard Mikheev-Smirnov-Wolfenstein behavior, andmore » at the level of detection, where they affect the cross section of neutrino elastic scattering on electrons. We find limits which are comparable to other existing model-independent constraints.« less
  • The formalism of nonstandard four-fermion interactions provides a convenient, model-independent way of parametrizing a wide class of ''new physics'' scenarios. In this article, we study the performance of reactor and superbeam neutrino experiments in the presence of such nonstandard interactions (NSI). Because of interference between the standard and nonstandard amplitudes, sizeable effects are to be expected if the NSI parameters are close to their current upper limits. We derive approximate formulas for the relevant oscillation probabilities including NSI, and show how the leading effects can be understood intuitively even without any calculations. We will present a classification of all possiblemore » NSI according to their impact on reactor and superbeam experiments, and it will turn out that these experiments are highly complementary in terms of their sensitivity to the nonstandard parameters. The second part of the paper is devoted to detailed numerical simulations, which will demonstrate how a standard oscillation fit of the mixing angle {theta}{sub 13} may fail if experimental data is affected by NSI. We find that for some nonstandard terms, reactor and superbeam experiments would yield seemingly conflicting results, while in other cases, they may agree well with each other, but the resulting value for {theta}{sub 13} could be far from the true value. This offset may be so large that the true {theta}{sub 13} is even ruled out erroneously. In the last section of the paper, we demonstrate that reactor and superbeam data can actually establish the presence of nonstandard interactions. Throughout our discussion, we pay special attention to the impact of the complex phases, and of the near detectors.« less
  • Cited by 7