Large gauge invariant nonstandard neutrino interactions

Gavela, M.B.; Hernández, Daniel E.; Ota, Toshihiko; Winter, Walter

doi:10.1103/physrevd.79.013007

Cited by 137 publications

(179 citation statements)

References 95 publications

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“…Model dependent [21,[54][55][56][57][58][59][60][61][62][63][64][65][66] and independent [53,67,68] bounds are obtained for these matter NSI parameters and are shown in the following table. In obtaining model dependent bounds on matter NSI the experiments with neutrinos and charged leptons -LSND, CHARM, CHARM-II, NuTeV and also LEP-II have been considered.…”

Section: Nsi and Its Effect On Neutrino Oscillation Probabilitiesmentioning

confidence: 99%

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

Rahman

Dasgupta

Adhikari

2015

J. Phys. G: Nucl. Part. Phys.

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We have studied the CP violation discovery reach in neutrino oscillation experiment with superbeam, neutrino factory and monoenergetic neutrino beam from electron capture process. For NSI satisfying model-dependent bound for shorter baselines (like CERN-Fréjus set-up ) there is insignificant effect of NSI on the the discovery reach of CP violation due to δ. Particularly, for superbeam and neutrino factory we have also considered relatively longer baselines for which there could be significant NSI effects on CP violation discovery reach for higher allowed values of NSI. For monoenergetic beam only shorter baselines are considered to study CP violation with different nuclei as neutrino sources. Interestingly for non-standard interactions -εeµ and εeτ of neutrinos with matter during propagation in longer baselines in superbeam, there is possibility of better discovery reach of CP violation than that with only Standard Model interactions of neutrinos with matter. For complex NSI we have shown the CP violation discovery reach in the plane of Dirac phase δ and NSI phase φij. The CP violation due to some values of δ remain unobservable with present and near future experimental facilities in superbeam and neutrino factory . However, in presence of some ranges of off-diagonal NSI phase values there are some possibilities of discovering total CP violation for any δCP value even at 5σ confidence level for neutrino factory. Our analysis indicates that for some values of NSI phases total CP violation may not be at all observable for any values of δ. Combination of shorter and longer baselines could indicate in some cases the presence of NSI. However, in general for NSIs 1 the CP violation discovery reach is better in neutrino factory set-ups. Using a neutrino beam from electron capture process for nuclei 110 50 Sn and 152 Yb, we have shown the discovery reach of CP violation in neutrino oscillation experiment. Particularly for 110 50 Sn nuclei CP violation could be found for about 51% of the possible δ values for a baseline of 130 km with boost factor γ = 500. The nuclei 152 Yb is although technically more feasible for the production of mono-energetic beam, but is found to be not suitable in obtaining good discovery reach of CP

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Section: Nsi and Its Effect On Neutrino Oscillation Probabilitiesmentioning

confidence: 99%

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

Rahman

Dasgupta

Adhikari

2015

J. Phys. G: Nucl. Part. Phys.

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“…When H acquires a non-zero vacuum expectation value v, this operator leads to SU (2)-violating four-fermion contact interactions, so that NSI in the neutrino sector can be generated without inducing phenomenologically-problematic four-charged-lepton couplings or other harmful effects. On the other hand, this procedure leads to an additional suppression of order v2/M 2 and requires some cancellation conditions at tree level [164]. Larger non-standard effects could be generated in theories involving light mediators (≪ M W ) with very small couplings.…”

Section: Effective Theory Of New Physics In the Neutrino Sectormentioning

confidence: 99%

“…Model-independent experimental constraints on the ε s,d,m αβ range from 10 −4 to O(1) [16,[159][160][161][162], while model-dependent limits are often much tighter [163,164] since, in concrete models, NSI in the neutrino sector are usually accompanied by non-standard effects in the charged-lepton sector that are constrained, for example, by rare decay searches or measurements of the weak mixing angle.…”

Section: Effective Theory Of New Physics In the Neutrino Sectormentioning

confidence: 99%

Interim Design Report

Abrams¹,

Agarwalla²,

Alekou³

et al. 2011

Self Cite

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“…However, it has been shown [17,18,26,27] that for the NU and 4L operators, it is possible to cancel all contributions to processes with four charged fermions while lepton flavour violation is still present in the neutrino sector. For the 2L2Q operators, it is trivial to expand the operators in components and see that this cancellation is not possible for the four-chargedfermion (4CF) operators with quarks, since both up and down quarks carry electromagnetic charge and both contributions would need to cancel simultaneously.…”

Section: New Physics At Near Detectorsmentioning

confidence: 99%

“…III along with the weaker model-independent ones. The operator can in principle also be realized by a combination of the other types of mediator fields, e.g., Z ′ (1 v 0 ) and W ′ (3 v 0 ), in which the couplings between leptons and the mediation fields must follow a specific relation to cancel 4CF [27]. …”

Section: New Physics With Leptons: 4l Operators a Bounds On 4lmentioning

confidence: 99%

New physics searches at near detectors of neutrino oscillation experiments

Antusch

Blennow

Fernández‐Martínez

et al. 2010

J. High Energ. Phys.

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We systematically investigate the prospects of testing new physics with tau sensitive near detectors at neutrino oscillation facilities. For neutrino beams from pion decay, from the decay of radiative ions, as well as from the decays of muons in a storage ring at a neutrino factory, we discuss which effective operators can lead to new physics effects. Furthermore, we discuss the present bounds on such operators set by other experimental data currently available. For operators with two leptons and two quarks we present the first complete analysis including all relevant operators simultaneously and performing a Markov Chain Monte Carlo fit to the data. We find that these effects can induce tau neutrino appearance probabilities as large as O(10 −4 ), which are within reach of forthcoming experiments. We highlight to which kind of new physics a tau sensitive near detector would be most sensitive.

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Large gauge invariant nonstandard neutrino interactions

Cited by 137 publications

References 95 publications

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

The discovery reach ofCPviolation in neutrino oscillation with non-standard interaction effects

Interim Design Report

New physics searches at near detectors of neutrino oscillation experiments

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