Constraints on Einstein-dilation-Gauss-Bonnet Gravity and electric charge of black hole from GW230529

In this work, we study the implications of GW230529 on gravity theories and the charge of black holes. The GW230529, which was initially released in O4a, is most likely neutron star-black hole (NSBH) mergers. We reanalyze the data from the GW230529 event to obtain bounds on the Einstein-dilation-Gauss-Bonnet (EdGB) gravity parameter √αEdGB and the electric charge of black holes. The event places a $90%$ credible upper bounds on √αEdGB of 0.298 km. After including high order corrections of EdGB gravity, the bounds improve to √αEdGB 0.260 km. Analyses of GW230529 also yield a $90%$ credible upper bounds on charge-to-mass ratio ζ 0.024. The constraints are more stringent than those derived from previously observed single gravitational wave merger event.