The Daya Bay and T2K results on <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:msup><mml:mrow><mml:mi mathvariant="normal">sin</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msup><mml:mo>⁡</mml:mo><mml:mn>2</mml:mn><mml:msub><mml:mrow><mml:mi>θ</mml:mi></mml:mrow><mml:mrow><mml:mn>13</mml:mn></mml:mrow></mml:msub></mml:math> and non-standard neutrino interactions

Girardi, Ivan; Meloni, Davide; Petcov, S.T.

doi:10.1016/j.nuclphysb.2014.06.014

Cited by 41 publications

(23 citation statements)

References 29 publications

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“…The presence of NSI has also been considered to reconcile the measured value of θ 13 in reactor experiments and T2K [157]. In that case, it is suggested that CC-NSI in the neutrino production and detection processes may be responsible for the different values of the reactor mixing angle measured in Daya Bay and T2K.…”

Section: Nsi In Long-baseline Neutrino Experimentsmentioning

confidence: 98%

Neutrino Oscillations and Non-standard Interactions

2018

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Current neutrino experiments are measuring the neutrino mixing parameters with an unprecedented accuracy. The upcoming generation of neutrino experiments will be sensitive to subdominant neutrino oscillation effects that can in principle give information on the yet-unknown neutrino parameters: the Dirac CP-violating phase in the PMNS mixing matrix, the neutrino mass ordering and the octant of θ 23 . Determining the exact values of neutrino mass and mixing parameters is crucial to test various neutrino models and flavor symmetries that are designed to predict these neutrino parameters. In the first part of this review, we summarize the current status of the neutrino oscillation parameter determination. We consider the most recent data from all solar neutrino experiments and the atmospheric neutrino data from Super-Kamiokande, IceCube, and ANTARES. We also implement the data from the reactor neutrino experiments KamLAND, Daya Bay, RENO, and Double Chooz as well as the long baseline neutrino data from MINOS, T2K, and NOνA. If in addition to the standard interactions, neutrinos have subdominant yet-unknown Non-Standard Interactions (NSI) with matter fields, extracting the values of these parameters will suffer from new degeneracies and ambiguities. We review such effects and formulate the conditions on the NSI parameters under which the precision measurement of neutrino oscillation parameters can be distorted. Like standard weak interactions, the non-standard interaction can be categorized into two groups: Charged Current (CC) NSI and Neutral Current (NC) NSI. Our focus will be mainly on neutral current NSI because it is possible to build a class of models that give rise to sizeable NC NSI with discernible effects on neutrino oscillation. These models are based on new U(1) gauge symmetry with a gauge boson of mass 10 MeV. The UV complete model should be of course electroweak invariant which in general implies that along with neutrinos, charged fermions also acquire new interactions on which there are strong bounds. We enumerate the bounds that already exist on the electroweak symmetric models and demonstrate that it is possible to build viable models avoiding all these bounds. In the end, we review methods to test these models and suggest approaches to break the degeneracies in deriving neutrino mass parameters caused by NSI.

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Section: Nsi In Long-baseline Neutrino Experimentsmentioning

confidence: 98%

Neutrino Oscillations and Non-standard Interactions

2018

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“…It is important to notice that, besides the need for more restrictive bounds on NSI parameters, it is also necessary to solve the possible confusion between standard and non-standard parameters. As has been stated in the past [36], it is possible to have a confusion in neutrino oscillation experiments between NSI parameters and standard mixing angles, especially 13 q ; recently, this subject has been discussed in the context of solar [131] and reactor neutrinos [78,79]. The significant progress in improving the precision on 13 q will strongly restrict this possibility in the near future.…”

Section: Future Prospectsmentioning

confidence: 98%

Non standard neutrino interactions: current status and future prospects

2015

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Neutrino oscillations have become well-known phenomena; the measurements of neutrino mixing angles and mass squared differences are continuously improving. Future oscillation experiments will eventually determine the remaining unknown neutrino parameters, namely, the mass ordering, normal or inverted, and the CP-violating phase. On the other hand, the absolute mass scale of neutrinos could be probed by cosmological observations, single beta decay as well as by neutrinoless double beta decay experiments. Furthermore, the last one may shed light on the nature of neutrinos, Dirac or Majorana, by measuring the effective Majorana mass of neutrinos. However, the neutrino mass generation mechanism remains unknown. A well-motivated phenomenological approach to search for new physics, in the neutrino sector, is that of non-standard interactions. In this short review, the current constraints in this picture, as well as the perspectives from future experiments, are discussed.

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“…[7][8][9]) and with more phenomenological approaches, constraining their relative size with different experimental setups (see, e.g., refs. [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26]). Although constructing (SU(2) L ×U(1) Y gaugeinvariant) models with large neutrino NSI and consistent with all current experimental constraints, mainly from charged-lepton flavor-violating processes, requires a certain amount of fine-tuning [9], they cannot be completely excluded.…”

Section: Introductionmentioning

confidence: 99%

Non-standard interactions with high-energy atmospheric neutrinos at IceCube

Salvadó

Mena

Palomares‐Ruiz

et al. 2017

J. High Energ. Phys.

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Non-standard interactions in the propagation of neutrinos in matter can lead to significant deviations from expectations within the standard neutrino oscillation framework and atmospheric neutrino detectors have been considered to set constraints. However, most previous works have focused on relatively low-energy atmospheric neutrino data. Here, we consider the one-year high-energy through-going muon data in IceCube, which has been already used to search for light sterile neutrinos, to constrain new interactions in the µτ -sector. In our analysis we include several systematic uncertainties on both, the atmospheric neutrino flux and on the detector properties, which are accounted for via nuisance parameters. After considering different primary cosmic-ray spectra and hadronic interaction models, we improve over previous analysis by using the latest data and showing that systematics currently affect very little the bound on the off-diagonal ε µτ , with the 90% credible interval given by −6.0 × 10 −3 < ε µτ < 5.4 × 10 −3 , comparable to previous results. In addition, we also estimate the expected sensitivity after 10 years of collected data in IceCube and study the precision at which non-standard parameters could be determined for the case of ε µτ near its current bound.

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The Daya Bay and T2K results on sin2⁡2θ13 and non-standard neutrino interactions

Cited by 41 publications

References 29 publications

Neutrino Oscillations and Non-standard Interactions

Neutrino Oscillations and Non-standard Interactions

Non standard neutrino interactions: current status and future prospects

Non-standard interactions with high-energy atmospheric neutrinos at IceCube

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