Observation of electron-antineutrino disappearance at Daya Bay.

Neutrino masses are yet unknown. We discuss the present state of effective electron antineutrino mass from β decay experiments; effective Majorana neutrino mass from neutrinoless double-beta decay experiments; neutrino mass squared differences from neutrino oscillation: solar, atmospheric, reactor, and accelerator-based experiments; sum of neutrino masses from cosmological observations. Current experimental challenges in the determination of neutrino masses are briefly discussed. The main focus is devoted to contemporary experiments.

Section: Reactor Neutrino Experimentmentioning

confidence: 99%

Theoretical and Experimental Challenges in the Measurement of Neutrino Mass

Singh,

Mirza

2023

“…The discovery of neutrino flavor oscillation is a tremendous achievement in particle physics during the last two decades [1][2][3], which manifests that neutrinos have masses, and the leptonic mixing matrix is nontrivial. However, the origin of the flavor mixing is elusive for theorists.…”

Section: Introductionmentioning

confidence: 99%

“…These patterns, especially the TBM, derived from flavor groups such as A 4 [15,16] and S 4 [16,17], are compatible with previous published data of atmospheric neutrino and solar neutrino. The discovery of a relatively large reactor mixing angle θ 13 [3,[18][19][20][21] and the remarkable progress of measurements of neutrino oscillation parameters, however, strictly constrain or exclude the above patterns. Hence, diverse methods to generate a nonzero reactor mixing angle θ 13 have been proposed.…”

Section: Introductionmentioning

confidence: 99%

The Geometric Correlations of Leptonic Mixing Parameters

Rong

2023

Leptonic mixing patterns are usually extracted on the basis of groups or algebraic structures. In this paper, we introduce an alternative geometric method to study the correlations between the leptonic mixing parameters. At the 3 σ level of the recent global fit data of neutrino oscillations, the distribution of the scattered points of the angles between the vectors, which are constructed by the element of the leptonic mixing matrix, is analysed. We find that the scattered points are concentrated on several special regions. Using the data in these regions, correlations of the leptonic mixing angles and the Dirac CP violating phase are obtained. The implications of the correlations are shown through the predicted flavor ratio of high-energy astrophysical neutrinos (HANs) at Earth.

“…Neutrino oscillations have been very well established by measuring the neutrino-mixing parameters θ 12 , θ 23 , θ 13 , Δ m 2 21 , and Δm 2 31 [1]. One of the promising candidates for explaining the observed Pontecorvo-Maki-Nakagawa-Sakata (PMNS) mixing matrix is the tribimaximal (TBM) [2] which is ruled out due to the discovery of the nonzero value of θ 13 [3][4][5][6][7][8][9]. Hence, in order to accommodate θ 13 ≠ 0, the PMNS matrix is reproduced using the next-to-TBM (NTBM) [10,11] which predicts the correlations among the phase and mixing angles.…”

Section: Introductionmentioning

confidence: 99%

Stability of the Next-to-Tribimaximal Mixings under Radiative Corrections with the Variation of the SUSY Breaking Scale in MSSM

Devi,

Singh,

Singh

2023

We analyze the radiative stability of the next-to-tribimaximal mixings (NTBM) with the variation of the SUSY breaking scale ( m S ) in MSSM, for both normal ordering (NO) and inverted ordering (IO) at the fixed input value of the seesaw scale M R = 1 0 15 GeV and two different values of tan β . All the neutrino oscillation parameters receive varying radiative corrections irrespective of the m S values at the electroweak scale, which are all within the 3 σ range of the latest global fit data at a low value of tan β . NO is found to be more stable than IO for all four different NTBM mixing patterns.