Probing quark-lepton correlation in GUTs with high-precision neutrino measurements

TL;DR

This paper investigates quark-lepton correlations in SO(10) GUTs using high-precision neutrino data, revealing implications for neutrino mass ordering, CP violation, and GUT model testability through various experiments.

Contribution

It performs numerical scans incorporating JUNO data to analyze flavor correlations, predicting neutrino properties and GUT model classifications relevant for experimental tests.

Findings

Preference for normal neutrino mass ordering

Predicted favored CP-violating phase region

Classified GUT models by testability in neutrinoless double beta decay

Abstract

GUTs unify quarks and leptons into same representations and predict correlations between their masses and mixing. We perform numerical scans in SO(10) GUTs to explore the flavor space with new data of JUNO taken into account. The quark-lepton correlation shows the preference of normal ordering for light neutrino masses, predicts favored region of the CP-violating phase in neutrino oscillations, and classifies GUT models based on their testability in neutrinoless double beta decay experiments. The quark-lepton correlation predicts mass spectrum of right-handed neutrinos, pointing to the energy scale of baryon and lepton number violation and providing sources for baryogenesis. We emphasize that, as high precision measurements of neutrino physics are coming, the quark-lepton correlation will provide increasingly important role in the testability of GUTs, complementary to proton decay measurements.