Mapping reactor neutrino spectra from TAO to JUNO

Capozzi, Francesco; Lisi, E.; Marrone, A.

doi:10.1103/physrevd.102.056001

Cited by 8 publications

(2 citation statements)

References 76 publications

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“…JUNO in combination with TAO aims to measure very precisely several of the neutrino oscillation parameters (sin 2 (θ 12 ), ∆m 2 21 , |∆m 2 31 |) and the neutrino mass ordering (see Refs. [11,[14][15][16][17][18][19][20]). Apart from this, a very rich program of new physics searches will be possible using JUNO (see Refs.…”

Section: Introductionmentioning

confidence: 99%

Short-baseline oscillation scenarios at JUNO and TAO

Basto-Gonzalez¹,

Forero²,

Giunti³

et al. 2021

Preprint

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We study the sensitivity of JUNO and TAO to the oscillations induced by two well-motivated scenarios beyond the standard model: Large Extra Dimensions (LED) and light sterile neutrinos in the context of 3+1 neutrino mixing. We find that JUNO+TAO can set competitive bounds on the parameter space of each scenario. In particular, we find that JUNO+TAO can be competitive with MINOS, DUNE or KATRIN in the context of LED. If LED are present in nature, we show that the parameters could be measured with a similar precision as the standard oscillation parameters. We also show that JUNO+TAO can test nearly all of the parameter space preferred by Gallium experiments in the context of 3+1 mixing. Finally, we discuss the possibility to distinguish the two scenarios from each other.

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Section: Introductionmentioning

confidence: 99%

Short-baseline oscillation scenarios at JUNO and TAO

Basto-Gonzalez¹,

Forero²,

Giunti³

et al. 2021

Preprint

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“…Recently, there is study suggesting that varying the central values of the oscillation parameter could give rise to significant impact on the sensitivities of neutrino MH resolution[52]. We believe that more precise measurements on the oscillation parameters could be more important than determining the fine structure for the future MBRO experiment(s).…”

mentioning

confidence: 99%

Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments

et al. 2020

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In the past decade, the precise measurement of the lastly known neutrino mixing angle $$\theta _{13}$$ θ 13 has enabled the resolution of neutrino mass hierarch (MH) at medium-baseline reactor neutrino oscillation (MBRO) experiments. Recent calculations of the reactor neutrino flux predict percent-level sub-structures in the $$\bar{\nu }_e$$ ν ¯ e spectrum due to Coulomb effects in beta decay. Such fine structure in the reactor spectrum has been an issue of concern for efforts to determine the neutrino MH for the MBRO approach, the concern being that the sub-dominant oscillation pattern used to discriminate different hierarchies will be obscured by fine structure. The energy resolutions of current reactor experiments are not sufficient to measure such fine structure, and therefore the size and location in energy of these predicted discontinuities has not been confirmed experimentally. There has been speculation that a near detector is required with sufficient energy resolution to resolve the fine structure. This article studies the impact of fine structure on the resolution of MH, based on predicted reactor neutrino spectra, using the measured spectrum from Daya Bay as a reference. We also investigate how a near detector could improve the sensitivity of neutrino MH resolution based on various assumptions of near detector energy resolution.

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Solar parameters in long-baseline accelerator neutrino oscillations

Denton

Gehrlein

2023

J. High Energ. Phys.

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Long-baseline (LBL) accelerator neutrino oscillation experiments, such as NOvA and T2K in the current generation, and DUNE-LBL and HK-LBL in the coming years, will measure the remaining unknown oscillation parameters with excellent precision. These analyses assume external input on the so-called “solar parameters,” θ12 and $$ \Delta {m}_{21}^2 $$ ∆ m 21 2 , from solar experiments such as SNO, SK, and Borexino, as well as reactor experiments like KamLAND. Here we investigate their role in long-baseline experiments. We show that, without external input on $$ \Delta {m}_{21}^2 $$ ∆ m 21 2 and θ12, the sensitivity to detecting and quantifying CP violation is significantly, but not entirely, reduced. Thus long-baseline accelerator experiments can actually determine $$ \Delta {m}_{21}^2 $$ ∆ m 21 2 and θ12, and thus all six oscillation parameters, without input from any other oscillation experiment. In particular, $$ \Delta {m}_{21}^2 $$ ∆ m 21 2 can be determined; thus DUNE-LBL and HK-LBL can measure both the solar and atmospheric mass splittings in their long-baseline analyses alone. While their sensitivities are not competitive with existing constraints, they are very orthogonal probes of solar parameters and provide a key consistency check of a less probed sector of the three-flavor oscillation picture. Furthermore, we also show that the true values of $$ \Delta {m}_{21}^2 $$ ∆ m 21 2 and θ12 play an important role in the sensitivity of other oscillation parameters such as the CP violating phase δ.

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Mapping reactor neutrino spectra from TAO to JUNO

Cited by 8 publications

References 76 publications

Short-baseline oscillation scenarios at JUNO and TAO

Short-baseline oscillation scenarios at JUNO and TAO

Potential impact of sub-structure on the determination of neutrino mass hierarchy at medium-baseline reactor neutrino oscillation experiments

Solar parameters in long-baseline accelerator neutrino oscillations

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