Imprints of scalar NSI on the CP-violation sensitivity using synergy among DUNE, T2HK and T2HKK

Medhi, Abinash; Devi, Moon Moon; Dutta, Debajyoti

doi:10.1007/jhep01(2023)079

Cited by 12 publications

(3 citation statements)

References 91 publications

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“…In addition to a vector mediator, one can consider different Lorentz structure for the underlying theory behind a new neutrino interaction. Scalar NSI has been investigated in the context of some neutrino oscillation experiments as well as early universe constraints [88,113,[132][133][134][135][136][137]. All previous studies, to our knowledge, focused on the diagonal scalar NSI parameters; instead, we focus here on the off-diagonal parameters.…”

Section: Scalar Non-standard Neutrino Interactionmentioning

confidence: 99%

How to identify different new neutrino oscillation physics scenarios at DUNE

Denton

Giarnetti

Meloni

2023

J. High Energ. Phys.

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Next generation neutrino oscillation experiments are expected to measure the remaining oscillation parameters with very good precision. They will have unprecedented capabilities to search for new physics that modify oscillations. DUNE, with its broad band beam, good particle identification, and relatively high energies will provide an excellent environment to search for new physics. If deviations from the standard three-flavor oscillation picture are seen however, it is crucial to know which new physics scenario is found so that it can be verified elsewhere and theoretically understood. We investigate several benchmark new physics scenarios by looking at existing long-baseline accelerator neutrino data from NOvA and T2K and determine at what sensitivity DUNE can differentiate among them. We consider sterile neutrinos and both vector and scalar non-standard neutrino interactions, all with new complex phases, the latter of which could conceivably provide absolute neutrino mass scale information. We find that, in many interesting cases, DUNE will have good model discrimination. We also perform a new fit to NOvA and T2K data with scalar NSI.

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Section: Scalar Non-standard Neutrino Interactionmentioning

confidence: 99%

How to identify different new neutrino oscillation physics scenarios at DUNE

Denton

Giarnetti

Meloni

2023

J. High Energ. Phys.

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“…Here, we attempt to investigate the potential impact of dual NSIs on the CP measurement potential of two upcoming long-baseline studies, DUNE and T2HK. At the probability level, the CP-asymmetry parameter can be written as follows [61]:…”

Section: Effect Of Dual Nsi Parameters On Oscillation Probabilitymentioning

confidence: 99%

Discernible NSI Effects in Long-Baseline Neutrino Experiments

Brahma¹,

Giri²

2023

Preprint

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Neutrino oscillation in the matter could get affected by the sub-dominant, yet unknown, nonstandard interactions. The upcoming long-baseline (LBL) neutrino experiments will be sensitive to these effects and can provide information on the unknown oscillation parameter values. In this article, we study the parameter degeneracies that can occur in DUNE, T2HK experiments, and a combination of both due to nonstandard interactions (NSI), arising simultaneously, from two different off-diagonal sectors, i.e., e − µ and e − τ . We derive constraints on both the NSI sectors using the combined datasets of NOνA and T2K. Our analysis reveals a significant impact that dual NSIs may have on the sensitivity of atmospheric mixing angle θ 23 in the normal ordering (NO) case. Furthermore, when non-standard interaction from the e − µ and e − τ sectors are included, we see significant changes in the probabilities for DUNE, T2HK, and as well as a combined analysis involving both. Moreover, the CP sensitivity gets affected significantly due to the presence of dual NSIs, and, in addition, the CP asymmetry also exhibits an appreciable difference.

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“…Given the high precision of current and upcoming neutrino experiments, these subdominant NSI effects on neutrino oscillations can significantly impact the physics potential of these experiments. We focus on the impact of scalar mediated NSIs [4,6,7] on the measurement of the leptonic phase 𝛿 𝐶 𝑃 in the long baseline experiments DUNE, [9], T2HK [10] and T2HKK [11]. Through a synergy analysis of these experiments, we investigate the effects of scalar NSIs in a model-independent manner.…”

Section: Introductionmentioning

confidence: 99%

Imprints of scalar mediated NSI on long baseline experiments

Medhi¹,

Devi²,

Dutta³

2023

Proceedings of 38th International Cosmic Ray Conference — PoS(ICRC2023)

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The experimental observation of the phenomena of neutrino oscillations, which essentially confirms non-zero masses of neutrinos, has opened a new sector to explore physics beyond the Standard Model. The models describing new-physics phenomena often come with some unknown interactions of neutrinos termed Non-Standard Interactions. It is crucial and interesting to explore the impact of Non-Standard Interactions in the ongoing and upcoming neutrino oscillations experiments to precisely measure the oscillation parameters. In this work, we have probed the impact of a scalar-mediated Non-Standard Interaction in the long baseline sector, focussing on the three upcoming long-baseline experiments: DUNE, T2HK and T2HKK. The effects of scalar Non-Standard Interaction appear as medium-dependent corrections to the neutrino mass term. Its contribution scales linearly with matter density, making long-baseline experiments among the most suitable candidates for probing such effects. We show that the presence of scalar Non-Standard Interaction may significantly impact the oscillation probabilities and the event rates at the detectors and the 𝜒 2 -sensitivities of 𝛿 𝐶 𝑃 -measurements of the experiment. We also show that synergy among the long-baseline experiments (DUNE+T2HK, DUNE+T2HKK) may offer a better capability of constraining the scalar NSI parameters as well as an improved sensitivity towards CP-violation.

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Imprints of scalar NSI on the CP-violation sensitivity using synergy among DUNE, T2HK and T2HKK

Cited by 12 publications

References 91 publications

How to identify different new neutrino oscillation physics scenarios at DUNE

How to identify different new neutrino oscillation physics scenarios at DUNE

Discernible NSI Effects in Long-Baseline Neutrino Experiments

Imprints of scalar mediated NSI on long baseline experiments

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