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Research Reveals New Insights into Neutrino Physics and Baryon Asymmetry

Strategic Insights

— 1 min read

Studies conducted at the National Institute of Technology have made significant progress in understanding the connections between neutrino physics, flavor symmetry, and baryon asymmetry. The research, which utilized the neutrinophillic two Higgs doublet model (v2HDM) framework, introduced an S-4 x Z(4) flavor symmetry with five flavons, resulting in mass matrices that realized the so-called Trimaximal TM1 mixing scheme. The model effectively explained lepton masses and flavor mixing under the normal ordering of neutrino masses, predicting that the effective neutrino mass in 0v beta beta decay lies between 4-5 meV, significantly lower than the sensitivity limits of current experiments.

Key Takeaways:

  • The research introduced a modified version of the Standard Model, including a scalar doublet and two right-handed neutrinos, forming the neutrinophillic two Higgs doublet (v2HDM) framework.
  • The introduction of an S-4 x Z(4) flavor symmetry with five flavons resulted in mass matrices that realized the so-called Trimaximal TM1 mixing scheme.
  • The model effectively explained lepton masses and flavor mixing under the normal ordering of neutrino masses.
  • The predicted effective neutrino mass in 0v beta beta decay lies between 4-5 meV.
  • The framework could support low-scale leptogenesis as a natural way to explain the observed imbalance between matter and antimatter in the Universe.
  • The research was funded by the Ministry of Human Resource Development (MHRD), Government of India, and GATE Senior Research Fellowship (SRF).
  • The study was conducted at the National Institute of Technology, Department of Physics, Tiruchirappalli 620015, Tamil Nadu, India.

Statistics:

  • The effective neutrino mass in 0v beta beta decay lies between 4-5 meV.
  • The introduction of the S-4 x Z(4) flavor symmetry resulted in five flavons.
  • The study was funded by the Ministry of Human Resource Development (MHRD) and GATE Senior Research Fellowship (SRF).
  • The research was published in Physics Letters B, Volume 870, 2025.

Sources:

  • Low Scale Leptogenesis and Tm 1 Mixing In Neutrinophilic Two Higgs Doublet Model (N2hdm) With S 4 Flavor Symmetry. Physics Letters B, 2025;870.
  • NewsRx. Studies from National Institute of Technology Yield New Information about Physics [Low Scale Leptogenesis and Tm 1 Mixing In Neutrinophilic Two Higgs Doublet Model (N2hdm) With S 4 Flavor Symmetry]. Journal of Physics Research. November 4, 2025; p 367.

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