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<p>In the framework of the hybrid type-I + type-II seesaw mechanism, we propose a minimal and predictive texture for the Majorana neutrino mass matrix. The texture contains four free parameters that lead to intriguing correlations and yield several notable predictions, including the exclusion of the inverted hierarchy of neutrino masses, the determination of the octant of the atmospheric mixing angle, and constraints on the three CP-violating phases. Furthermore, the texture is embedded within the discrete symmetry group <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(A_4 \times Z_{10} \times Z_7 \times Z_3\)</EquationSource> </InlineEquation>, together with the Standard Model gauge groups.</p>

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A minimal and predictive hybrid seesaw model for Majorana neutrinos

  • 期刊论文

  • 发表日期：

    2026年4月30日

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  • Sagar Tirtha Goswami,
  • Pralay Chakraborty,
  • Subhankar Roy

摘要

In the framework of the hybrid type-I + type-II seesaw mechanism, we propose a minimal and predictive texture for the Majorana neutrino mass matrix. The texture contains four free parameters that lead to intriguing correlations and yield several notable predictions, including the exclusion of the inverted hierarchy of neutrino masses, the determination of the octant of the atmospheric mixing angle, and constraints on the three CP-violating phases. Furthermore, the texture is embedded within the discrete symmetry group \(A_4 \times Z_{10} \times Z_7 \times Z_3\) , together with the Standard Model gauge groups.