The 2+2 and 3+1 four-family neutrino mixing at the neutrino factory

Donini, A.; Meloni, Davide

doi:10.1007/s100520100777

Cited by 33 publications

(34 citation statements)

References 38 publications

(81 reference statements)

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“…2 Old works on sterile neutrinos at LBL can be found in [20][21][22][23][24][25][26][27][28]. More recent studies focusing on the future LBNE/DUNE experiment [29] have been recently performed in [30][31][32].…”

Section: Jhep02(2016)111mentioning

confidence: 99%

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Agarwalla

Chatterjee

Dasgupta

et al. 2016

J. High Energ. Phys.

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Abstract:We study the impact of one light sterile neutrino on the prospective data expected to come from the two presently running long-baseline experiments T2K and NOνA when they will accumulate their full planned exposure. Introducing for the first time, the bi-probability representation in the 4-flavor framework, commonly used in the 3-flavor scenario, we present a detailed discussion of the behavior of the ν µ → ν e andν µ →ν e transition probabilities in the 3+1 scheme. We also perform a detailed sensitivity study of these two experiments (both in the stand-alone and combined modes) to assess their discovery reach in the presence of a light sterile neutrino. For realistic benchmark values of the mass-mixing parameters (as inferred from the existing global short-baseline fits), we find that the performance of both these experiments in claiming the discovery of the CP-violation induced by the standard CP-phase δ 13 ≡ δ, and the neutrino mass hierarchy get substantially deteriorated. The exact loss of sensitivity depends on the value of the unknown CP-phase δ 14 . Finally, we estimate the discovery potential of total CP-violation (i.e., induced simultaneously by the two CP-phases δ 13 and δ 14 ), and the capability of the two experiments of reconstructing the true values of such CP-phases. The typical (1σ level) uncertainties on the reconstructed phases are approximately 40 0 for δ 13 and 50 0 for δ 14 .

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Section: Jhep02(2016)111mentioning

confidence: 99%

Discovery potential of T2K and NOvA in the presence of a light sterile neutrino

Agarwalla

Chatterjee

Dasgupta

et al. 2016

J. High Energ. Phys.

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“…The analytical expressions for the oscillation probabilities in the (3+1) model in the one-mass dominance approximation in this parametrization have been presented in Ref. [51].…”

Section: Four Neutrino Mass Schemesmentioning

confidence: 99%

“…The ν µ → ν τ channel, therefore, is extremely promising as a "sterile neutrino" smoking gun, as it has been commented elsewhere (see, for example, Refs. [51,52] and refs. therein).…”

Section: Introductionmentioning

confidence: 99%

Sterile neutrinos at the CNGS

Donini

Maltoni

Meloni

et al. 2007

J. High Energy Phys.

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We study the potential of the CNGS beam in constraining the parameter space of a model with one sterile neutrino separated from three active ones by an O(eV 2 ) masssquared difference, ∆m 2 sbl . We perform our analysis using the OPERA detector as a reference (our analysis can be upgraded including a detailed simulation of the ICARUS detector). We point out that the channel with the largest potential to constrain the sterile neutrino parameter space at the CNGS beam is ν µ → ν τ . The reason for that is twofold: first, the active-sterile mixing angle that governs this oscillation is the less constrained by present experiments; second, this is the signal for which both OPERA and ICARUS have been designed, and thus benefits from an extremely low background. In our analysis we also took into account ν µ → ν e oscillations. We find that the CNGS potential to look for sterile neutrinos is limited with nominal intensity of the beam, but it is significantly enhanced with a factor 2 to 10 increase in the neutrino flux. Data from both channels allow us, in this case, to constrain further the four-neutrino model parameter space. Our results hold for any value of ∆m 2 sbl 0.1 eV 2 , i.e. when oscillations driven by this mass-squared difference are averaged. We have also checked that the bound on θ 13 that can be put at the CNGS is not affected by the possible existence of sterile neutrinos.

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“…Although a similar analysis for CP-violating signals has not been carried out, the authors of reference [195] have presented a first analysis of the precision achievable in the simultaneous measurement of mixing angles and CP-violating phases (but see [194,195,[197][198][199][200][201][202][203] for preliminary analyses). The experimental setup adopted there is a Neutrino Factory with 50 GeV stored muons, with two detectors of the hybrid-MIND type (a magnetised emulsion cloud chamber followed by a magnetised iron tracking calorimeter), located at L = 3 000 km and 7 500 km.…”

Section: Optimisation Issues and Sensitivity Of Alternative Setupsmentioning

confidence: 99%