Leptoquark search at the Forward Physics Facility

In this study, we calculate the sensitivity reach on vector leptoquark (LQ) $U_1$ at experiments proposed in Forward Physics Facility (FPF), including FASER$\nu$, FASER$\nu2$, FLArE (10 tons), and (100 tons) using neutrino-nucleon scattering ($\nu N \rightarrow \nu N'$ $\nu l N'$). We cover a wide mass range of $10^{-3}$ GeV $\leq M_{LQ}\leq 10^4$ GeV. The new result shows that offers best to LQ model. curves for all follow similar pattern with weakened sensitivities increment mass. combine obtained from neutral- charged-current interactions neutrinos.