2014/01/20 by Ravi Kuchimanchi, Kuchimanchi, Ravi
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.48550/arxiv.1401.5066
10 pages, slightly expanded, references added
openalex publication_date 2014/01/20 · arxiv created 2014/04/24 · arxiv updated 2014/04/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We find that minimizing the number of fine tuning relations in non-supersymmetric models can determine the scales at which some gauge symmetries beyond the standard model must break. We show that SU(2)R and B-L gauge symmetries of the minimal left-right symmetric model must break at a scale 1015 GeV or higher, determined by the hierarchy problem and small ratios of quark masses, if parameters that break chiral or μ-symmetries (and therefore can be naturally small), are not fine-tuned. This provides the raison d'etre for the seesaw scale ∼ 1015GeV indicated by neutrino experiments. Small ratios of fermion (quark) masses, which are natural in the standard model due to approximate chiral symmetry, will have to be fine tuned in minimal left right model if SU(2)R × U(1)B-L breaks at a lower scale.