Constraining nonstandard neutrino-quark interactions with solar, reactor, and accelerator data

Escrihuela, F. J.; Miranda, O. G.; Tórtola, Mariam; Valle, J. W. F.

doi:10.1103/physrevd.80.105009

Cited by 60 publications

(15 citation statements)

References 65 publications

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“…Recent studies show that this new solution survives combining all the available data on oscillation [6]. In fact in presence of Non-Standard Interactions (NSI), the fit to solar data is slightly better as in the presence of NSI, the upturn of the spectrum at low energy predicted by the standard LMA solution without NSI can be suppressed, leading to a better agreement with the data [3][4][5]. The NSI can also affect other observable quantities such as the invisible decay width of the Z boson (at one-loop) or neutrino scattering off…”

Section: Introductionsupporting

confidence: 62%

“…Effects of Lagrangian (1.1) on neutrino oscillation have been extensively studied in the literature. In particular in [3][4][5], it is shown that in the presence of a deviation from universality (i.e., | f ee − f µµ |, | f ee − f τ τ | = 0 with f = u, d), another solution with cos(2θ 12 ) < 0 for solar and KamLAND data exists. This solution is known as LMA-Dark solution.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Shedding light on LMA-dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50

Bakhti

Farzan

2014

J. High Energ. Phys.

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In the presence of Non-Standard neutral current Interactions (NSI) a new solution to solar neutrino anomaly with cos 2θ 12 < 0 appears. We investigate how this solution can be tested by upcoming intermediate baseline reactor experiments, JUNO and RENO-50. We point out a degeneracy between the two solutions when both hierarchy and the θ 12 octant are flipped. We then comment on how this degeneracy can be partially lifted by long baseline experiments sensitive to matter effects such as the NOvA experiment.

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Section: Introductionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Shedding light on LMA-dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50

Bakhti

Farzan

2014

J. High Energ. Phys.

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“…As discussed in Refs. [5,[10][11][12], non-oscillation data (such as that from neutrino scattering experiments) is needed to break this degeneracy.Recently, coherent neutrino-nucleus scattering has been observed for the first time by the COHERENT experiment [13], using neutrinos produced at the Spallation Neutron Source (SNS) in Oak Ridge National Laboratory. The observed interaction rate is in good agreement with the Standard Model (SM) prediction and can be used to constrain NSI.…”

mentioning

confidence: 99%

“…As discussed in Refs. [5,[10][11][12], non-oscillation data (such as that from neutrino scattering experiments) is needed to break this degeneracy.…”

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confidence: 99%

COHERENT enlightenment of the neutrino dark side

et al. 2017

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In the presence of non-standard neutrino interactions (NSI), oscillation data are affected by a degeneracy which allows the solar mixing angle to be in the second octant (aka the dark side) and implies a sign flip of the atmospheric mass-squared difference. This leads to an ambiguity in the determination of the ordering of neutrino masses, one of the main goals of the current and future experimental neutrino program. We show that the recent observation of coherent neutrino-nucleus scattering by the COHERENT experiment, in combination with global oscillation data, excludes the NSI degeneracy at the 3.1σ (3.6σ) CL for NSI with up (down) quarks.The standard three-flavour oscillation scenario is supported by a large amount of data from neutrino oscillation experiments. The determination of oscillation parameters (see, e.g., Ref.[1]) is very robust, and for a broad range of new physics scenarios only small perturbations of the standard oscillation picture are allowed by data. There is, however, an exception to this statement: in the presence of non-standard neutrino interactions (NSI) [2-4] a degeneracy exists in oscillation data, leading to a qualitative change of the lepton mixing pattern. This was first observed in the context of solar neutrinos, where for suitable NSI the data can be explained by a mixing angle θ 12 in the second octant, the so-called LMA-Dark (LMA-D) [5] solution. This is in sharp contrast to the established standard MSW solution [2,6], which requires a mixing angle θ 12 in the first octant.The origin of the LMA-D solution is a degeneracy in oscillation probabilities due to a symmetry of the Hamiltonian describing neutrino evolution in the presence of NSI [7][8][9][10]. This degeneracy involves not only the octant of θ 12 but also a change in sign of the larger neutrino mass-squared difference, ∆m 2 31 , which is used to parameterize the type of neutrino mass ordering (normal versus inverted). Hence, the LMA-D degeneracy makes it impossible to determine the neutrino mass ordering by oscillation experiments [10], and therefore jeopardizes one of the main goals of the upcoming neutrino oscillation program. As discussed in Refs. [5,[10][11][12], non-oscillation data (such as that from neutrino scattering experiments) is needed to break this degeneracy.Recently, coherent neutrino-nucleus scattering has been observed for the first time by the COHERENT experiment [13], using neutrinos produced at the Spallation Neutron Source (SNS) in Oak Ridge National Laboratory. The observed interaction rate is in good agreement with the Standard Model (SM) prediction and can be used to constrain NSI. In this Letter we show that this result excludes the LMA-D solution at 3.1σ (3.6σ) CL for NSI with up (down) quarks when combined with oscillation data.NSI formalism and the LMA-D degeneracy. We consider the presence of neutral-current (NC) NSI in the form of dimension-six four-fermion operators, following the notation of Ref. [8]. Since we are interested in the contribution of the NSI to the effective potential of ne...

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“…[11,[25][26][27][28], both flavor-diagonal and flavor-changing NSI parameters are constrained by neutrino oscillation experiments. They can affect neutrino production, detection, and propagation through matter.…”

Section: Neutrino Oscillationsmentioning

confidence: 99%

RareZdecays and neutrino flavor universality

et al. 2016

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We study rare four-body decays of the Z-boson involving at least one neutrino and one charged lepton. Large destructive interferences make these decays very sensitive to the Z couplings to neutrinos. As the identified charged leptons can determine the neutrino flavors, these decays probe the universality of the Z couplings to neutrinos. The rare four-body processes could be accurately measured at future lepton colliders, leading to percent level precision.

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Constraining nonstandard neutrino-quark interactions with solar, reactor, and accelerator data

Cited by 60 publications

References 65 publications

Shedding light on LMA-dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50

Shedding light on LMA-dark solar neutrino solution by medium baseline reactor experiments: JUNO and RENO-50

COHERENT enlightenment of the neutrino dark side

RareZdecays and neutrino flavor universality

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