Phenomenological analysis of hybrid textures of neutrinos

Dev, S.; Verma, Surender; Gupta, Shivani

doi:10.1016/j.physletb.2010.02.055

Cited by 48 publications

(26 citation statements)

References 22 publications

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“…We are then left with the effective Majorana mass matrix M ν = κv 2 /2 for three light neutrinos from Eq. (16). If the dimension-5 Weinberg operator is obtained in the framework of the minimal supersymmetric standard model, one will be left with M ν = κ(v sin β) 2 /2, where tan β denotes the ratio of the vacuum expectation values of two Higgs doublets.…”

Section: Quantum Correctionsmentioning

confidence: 99%

Hybrid textures of Majorana neutrino mass matrix and current experimental tests

Liu

Zhou

2013

Phys. Rev. D

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Motivated by recent measurements of a relatively large θ 13 in the Daya Bay and RENO reactor neutrino experiments, we carry out a systematic analysis of the hybrid textures of Majorana neutrino mass matrix M ν , which contain one texture zero and two equal nonzero matrix elements. We show that three neutrino masses (m 1 , m 2 , m 3 ) and three leptonic CP-violating phases (δ, ρ, σ) can fully be determined from two neutrino mass-squared differences (δm 2 , ∆m 2 ) and three flavor mixing angles (θ 12 , θ 23 , θ 13 ). Out of sixty logically possible patterns of M ν , thirty-nine are found to be compatible with current experimental data at the 3σ level. We demonstrate that the texture zero of M ν is stable against one-loop quantum corrections, while the equality between two independent elements not. Phenomenological implications of M ν for the neutrinoless double-beta decay and leptonic CP violation are discussed, and a realization of the texture zero and equality by means of discrete flavor symmetries is illustrated.

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Section: Quantum Correctionsmentioning

confidence: 99%

Hybrid textures of Majorana neutrino mass matrix and current experimental tests

Liu

Zhou

2013

Phys. Rev. D

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“…where α and β are the Majorana phases. While analyzing the experimental results on neutrino mixing and mass matrices, we can often look for some particular features like equalities [1,2], zeros [3,4,5,6,7,8,9,10,11,12], hybrids of zeros and equalities [13,14,15,16,17], zero trace [18], or some other pattern [19,20,21,22] in their elements. Harrison, Perkins and Scott proposed one such type of mixing matrix [23] which had ν 2 trimaximally mixed and ν 3 bimaximally mixed.…”

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confidence: 99%

Two simple textures of the magic neutrino mass matrix

Channey

Kumar

2018

J. Phys. G: Nucl. Part. Phys.

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“…with in type-I+II seesaw [15], Type-II seesaw [16], inverse seesaw realization [17,18], linear seesaw realization [19,20] and scotogenic or radiative scenarios [21][22][23]. In literature, different phenomenological ansatz like texture zeros [24][25][26][27], hybrid textures [28][29][30], scaling neutrino mass matrix [31][32][33], magic neutrino mass matrix [34][35][36] have been proposed to understand the mechanism of neutrino mass generation. The flavor theoretic realization of these ansatze, based on non-Abelian discrete groups, rely on introducing one or more flavon fields and thus, suffers from flavon alignment perplexities.…”

Section: Introductionmentioning

confidence: 99%

Broken scaling neutrino mass matrix and leptogenesis based on A4 modular invariance

Kashav

Verma

2021

J. High Energ. Phys.

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In this work, we have proposed a modular A4 symmetric model of neutrino mass which, simultaneously, explains observed baryon asymmetry of the Universe (BAU). In minimal extension of the standard model (SM) with two right-handed neutrinos we work in a supersymmetric framework. At Type-I seesaw level, the model predicts scaling in the neutrino mass matrix. In order to have correct low energy phenomenology, we propose two possible scenarios of scale-breaking in the neutrino mass matrix emanating from Type-I seesaw. Scenario-1 is based on the dimension-5 Weinberg operator whereas scenario-2 implements Type-II seesaw via scalar triplet Higgs superfields (∆,$$ \overline{\Delta } $$ ∆ ¯ ). Interestingly, the breaking patterns in both, otherwise dynamically different scenarios, are similar which can be attributed to the same charge assignments of superfields (∆,$$ \overline{\Delta } $$ ∆ ¯ ) and the Higgs superfield Hu under modular A4 symmetry. The breaking is found to be proportional to the Yukawa coupling of modular weight 10 ($$ {Y}_{1,1\prime}^{10} $$ Y 1 , 1 ′ 10 ). We, further, investigates the predictions of the model under scenario-2 (Type-I+II) for neutrino mass, mixings and matter-antimatter asymmetry of the Universe. The model predicts normal hierarchical neutrino masses and provide a robust range (0.05 − 0.08)eV for sum of neutrino masses (Σmi). Lepton number violating 0νββ decay amplitude (Mee) is obtained to lie in the range (0.04 − 0.06)eV. Future 0νββ decay experiments such as NEXT and nEXO shall pose crucial test for the model. Both CP conserving and CP violating solutions are allowed in the model. Interesting correlations are obtained, specially, between Yukawa couplings of modular weight 2 and complex modulus τ. Contrary to $$ {Y}_2^2 $$ Y 2 2 and $$ {Y}_3^2 $$ Y 3 2 , the Yukawa coupling $$ {Y}_1^2 $$ Y 1 2 is found to be insensitive to τ and thus to CP violation because complex modulus τ is the only source of CP violation in the model. We, also, investigate the prediction of the model for BAU. The model exhibit consistent explanation of BAU for right-handed Majorana neutrino mass scale in the range ((1 − 5) × 1013) GeV.

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Phenomenological analysis of hybrid textures of neutrinos

Cited by 48 publications

References 22 publications

Hybrid textures of Majorana neutrino mass matrix and current experimental tests

Hybrid textures of Majorana neutrino mass matrix and current experimental tests

Two simple textures of the magic neutrino mass matrix

Broken scaling neutrino mass matrix and leptogenesis based on A4 modular invariance

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