D. Hundertmark, A. Laptev and T. Weidl New bounds on the Lieb-Thirring constants (44K, LaTeX2e) ABSTRACT. Improved estimates on the constants $L_{\gamma,d}$, for $1/2<\gamma<3/2$, $d\in N$ in the inequalities for the eigenvalue moments of Schr\"{o}dinger operators are established.