Constraining the nonstandard interaction parameters in long baseline neutrino experiments

Huitu, Katri; Kärkkäinen, Timo J.; Maalampi, J.; Vihonen, Sampsa

doi:10.1103/physrevd.93.053016

Cited by 44 publications

(32 citation statements)

References 39 publications

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“…Studies of matter NSI at DUNE and T2HK can be found in refs. [18,[22][23][24][25][26][27][28]. Studies of NSI with a second detector in Korea, in addition to the Kamiokande detector, can be found in refs.…”

Section: Jhep01(2017)071mentioning

confidence: 99%

Nonstandard neutrino interactions at DUNE, T2HK and T2HKK

Liao

Marfatia

Whisnant

2017

J. High Energ. Phys.

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We study the matter effect caused by nonstandard neutrino interactions (NSI) in the next generation long-baseline neutrino experiments, DUNE, T2HK and T2HKK. If multiple NSI parameters are nonzero, the potential of these experiments to detect CP violation, determine the mass hierarchy and constrain NSI is severely impaired by degeneracies between the NSI parameters and by the generalized mass hierarchy degeneracy. In particular, a cancellation between leading order terms in the appearance channels when eτ = cot θ 23 eµ , strongly affects the sensitivities to these two NSI parameters at T2HK and T2HKK. We also study the dependence of the sensitivities on the true CP phase δ and the true mass hierarchy, and find that overall DUNE has the best sensitivity to the magnitude of the NSI parameters, while T2HKK has the best sensitivity to CP violation whether or not there are NSI. Furthermore, for T2HKK a smaller off-axis angle for the Korean detector is better overall. We find that due to the structure of the leading order terms in the appearance channel probabilities, the NSI sensitivities in a given experiment are similar for both mass hierarchies, modulo the phase change δ → δ + 180 • .

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Section: Jhep01(2017)071mentioning

confidence: 99%

Nonstandard neutrino interactions at DUNE, T2HK and T2HKK

Liao

Marfatia

Whisnant

2017

J. High Energ. Phys.

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“…We restricted ourselves to a discussion of CP asymmetries using solely the probability for the electron appearance channel P µe and showed how NSI effects translate at the level of event rates. Since then there has been a lot of activity [29,[38][39][40][41][42] in this direction exploring effects due to propagation NSI at long baselines. In [38], the goal was to discuss possible improvement of bounds on the NSI parameters using different channels at long baseline experiments.…”

Section: Introductionmentioning

confidence: 99%

“…Ref. [41] deals with constraining NSI parameters using long baseline experiments. Very recently, it has been suggested that the proposed MOMENT experiment due to its much smaller baseline may prove helpful in solving the degeneracies due to NSI leading to unambiguous determination of CP violation [42].…”

Section: Introductionmentioning

confidence: 99%

Nonstandard interactions spoiling theCPviolation sensitivity at DUNE and other long baseline experiments

Masud

Mehta

2016

Phys. Rev. D

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It is by now established that neutrino oscillations occur due to non-zero masses and parameters in the leptonic mixing matrix. The extraction of oscillation parameters may be complicated due to subleading effects such as non-standard neutrino interactions (NSI) and one needs to have a fresh look how a particular parameter value is inferred from experimental data. In the present work, we focus on an important parameter entering the oscillation framework -the leptonic CP violating phase δ, about which we know very little. We demonstrate that the sensitivity to CP violation gets significantly impacted due to NSI effects for the upcoming long baseline experiment, Deep Underground Neutrino Experiment (DUNE). We also draw a comparison with the sensitivities of other ongoing neutrino beam experiments such as NOvA and T2K as well as a future generation experiment, T2HK.a

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“…Recently, considering the model independent approach, we have studied the effect of lepton flavor violating NSIs on physics potential of long-baseline experiments [54]. Moreover, the recent works on the effect of NSI on the measurements of various neutrino oscillation experiments can be found in [55][56][57][58][59][60][61][62][63]. Since we focus on model-dependent approach in this paper, we consider the LVF decays of B meson in Z model to get the bound on NSI parameter as discussed in Sect.…”

Section: Neutrino Oscillation In the Presence Of Nsismentioning

confidence: 99%

Impact of lepton flavor universality violation on CP-violation sensitivity of long-baseline neutrino oscillation experiments

Soumya¹,

Mohanta²

2017

Eur. Phys. J. C

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The observation of neutrino oscillation as well as the recent experimental results on lepton flavor universality (LFU) violation in B meson decays are indications of new physics beyond the standard model. Many theoretical models, which are introduced in the literature as an extension of SM to explain these observed deviations in LFU, lead to a new kind of interactions, the so-called non-standard interaction (NSI) between the elementary particles. In this paper, we consider a model with an additional Z boson (which is quite successful in explaining the observed LFU anomalies) and analyze its effect in the lepton flavor violating (LFV) B d → τ ± e ∓ decay modes. From the present upper bound of the B d → τ ± e ∓ branching ratio, we obtain the constraints on the new physics parameters, which are related to the corresponding NSI parameters in the neutrino sector by SU (2) L symmetry. These new parameters are expected to have potential implications in the neutrino oscillation studies and in this work we investigate the possibility of observing the effects of these interactions in the currently running and upcoming long-baseline experiments, i.e., NOνA and DUNE, respectively.

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Constraining the nonstandard interaction parameters in long baseline neutrino experiments

Cited by 44 publications

References 39 publications

Nonstandard neutrino interactions at DUNE, T2HK and T2HKK

Nonstandard neutrino interactions at DUNE, T2HK and T2HKK

Nonstandard interactions spoiling theCPviolation sensitivity at DUNE and other long baseline experiments

Impact of lepton flavor universality violation on CP-violation sensitivity of long-baseline neutrino oscillation experiments

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