Leptoquarks in Oblique Corrections and Higgs Signal Strength: Status and Prospects

Understand

Leptoquarks (LQs) are predicted within Grand Unified Theories and are well motivated by the current flavor anomalies.

• In this article we investigate the impact of scalar LQs on Higgs decays and oblique corrections as complementary observables in the search for them.
• Taking into account all five LQ representations under the Standard Model gauge group and including the most general mixing among them, we calculate the effects in $h\to\gamma\gamma$, $h\to gg$, $h \to Z \gamma$ and the Peskin-Takeuchi parameters $S$, $T$ and $U$.
• We find that these observables depend on the same Lagrangian parameters, leading to interesting correlations among them.