Confronting the vector leptoquark hypothesis with new low- and high-energy data

Area of Science:

• High Energy Physics
• Particle Physics
• Theoretical Physics

Background:

• Charged-current B-meson anomalies suggest potential new physics beyond the Standard Model.
• Leptoquark models offer a compelling explanation for these observed anomalies.

Purpose of the Study:

• To perform an updated phenomenological analysis of the simplified leptoquark model.
• To investigate the compatibility of low-energy data with high-energy constraints.
• To explore leptoquark couplings to third-generation fermions.

Main Methods:

• Phenomenological analysis incorporating new data.
• Comparison of low-energy observables (lepton flavor universality ratios) with high-energy constraints (Drell-Yan data).
• Model building considerations for leptoquark couplings.

Main Results:

• Demonstrated good compatibility between low-energy B-meson data and high-energy Drell-Yan constraints.
• Found that data supports a framework where leptoquarks couple similarly to left- and right-handed third-generation fermions.
• Identified a well-motivated model-building scenario.

Conclusions:

• The simplified leptoquark model is consistent with current experimental data.
• The proposed leptoquark coupling scenario is theoretically well-motivated.
• The high-luminosity phase of the LHC will probe the high-energy implications of this model at 95% confidence level.