Looking for Lorentz invariance violation (LIV) in the latest long baseline accelerator neutrino oscillation data

Rahaman, Ushak

doi:10.1140/epjc/s10052-021-09598-4

Cited by 18 publications

(10 citation statements)

References 62 publications

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“…A similar result would be expected from NOvA [390]. A mild tension between T2K and NOvA oscillation measurements can be eased by nonzero CPT-odd Lorentz violation [391], although such possibility is severely constrained by other results [392]. MINOS [393] had a magnetized far detector and unlikely other experiments it allowed a direct comparison of neutrinos and anti-neutrinos.…”

Section: Cpt Violationsupporting

confidence: 64%

Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor

Argüelles¹,

Barenboim²,

Bustamante³

et al. 2022

Preprint

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Section: Cpt Violationsupporting

confidence: 64%

Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor

Argüelles¹,

Barenboim²,

Bustamante³

et al. 2022

Preprint

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“…The effect of new physics on the determination of unknown oscillation parameters in the long-baseline accelerator neutrino experiments have been studied in detail in the literature [73]. In recent times, efforts have been made to resolve the tension between NOνA and T2K experiments with the help of non-standard physics [74][75][76][77]. In this section, we will discuss the present status of different non-standard physics to resolve this tension.…”

Section: Resolution Of the Noνa -T2k Tension With New Physicsmentioning

confidence: 99%

A Review of the Tension between the T2K and NOνA Appearance Data and Hints to New Physics

2022

Self Cite

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In this article, we review the status of the tension between the long-baseline accelerator neutrino experiments T2K and NOνA. The tension arises mostly due to the mismatch in the apappearance data of the two experiments. We explain how this tension arises based on νμ→νe and ν¯μ→ν¯e oscillation probabilities. We define the reference point of vacuum oscillation, maximal θ23 and δCP and compute the νe/ν¯e appearance events for each experiment. We then study the effects of deviating the unknown parameters from the reference point and the compatibility of any given set of values of unknown parameters with the data from T2K and NOνA. T2K observes a large excess in the νe appearance event sample compared to the expected νe events at the reference point, whereas NOνA observes a moderate excess. The large excess in T2K dictates that δCP be anchored at −90° and that θ23 > π/4 with a preference for normal hierarchy. The moderate excess at NOνA leads to two degenerate solutions: (a) NH, 0 < δCP < 180°, and θ23 > π/4; (b) IH, −180° < δCP < 0, and θ23 > π/4. This is the main cause of tension between the two experiments. We review the status of three beyond standard model (BSM) physics scenarios, (a) non-unitary mixing, (b) Lorentz invariance violation, and (c) non-standard neutrino interactions, to resolve the tension.

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“…The tension is reduced when the data are analyzed in the context of Lorentz invariance violation (LIV). However, it is accompanied by a new mild tension between the best-fit values of sin 2 θ 23 [33]. Besides, the 0123456789().…”

Section: Introductionmentioning

confidence: 99%

Improving CP measurement with THEIA and muon decay at rest

Kong

Pasquini

2022

Eur. Phys. J. C

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We explore the possibility of using the recently proposed THEIA detector to measure the $${\bar{\nu }}_\mu \rightarrow {\bar{\nu }}_e$$ ν ¯ μ → ν ¯ e oscillation with neutrinos from a muon decay at rest ($$\mu $$ μ DAR) source to improve the leptonic CP phase measurement. Due to its intrinsic low-energy beam, this $$\mu $$ μ THEIA configuration ($$\mu $$ μ DAR neutrinos at THEIA) is only sensitive to the genuine leptonic CP phase $$\delta _D$$ δ D and not contaminated by the matter effect. With detailed study of neutrino energy reconstruction and backgrounds at the THEIA detector, we find that the combination with the high-energy DUNE can significantly reduce the CP uncertainty, especially around the maximal CP violation cases $$\delta _D = \pm 90^\circ $$ δ D = ± 90 ∘ . Both the $$\mu $$ μ THEIA-25 with 17 kt and $$\mu $$ μ THEIA-100 with 70 kt fiducial volumes are considered. For DUNE + $$\mu $$ μ THEIA-100, the CP uncertainty can be better than $$8^\circ $$ 8 ∘ .

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Looking for Lorentz invariance violation (LIV) in the latest long baseline accelerator neutrino oscillation data

Cited by 18 publications

References 62 publications

Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor

Snowmass White Paper: Beyond the Standard Model effects on Neutrino Flavor

A Review of the Tension between the T2K and NOνA Appearance Data and Hints to New Physics

Improving CP measurement with THEIA and muon decay at rest

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