NEW MASS RELATION FOR MESON 25-PLET

By assuming the existence of (quasi)-linear Regge trajectories for 25- plet mesons in the low-energy region, we derive a new, 14th power, mes on mass relation. This relation may be reduced to a quadratic Gell-Man n-Okubo-type formula by fitting the values of the Regge slopes of thes e (quasi)-linear trajectories. Such a formula holds with an accuracy o f similar to 2% for vector mesons, and also suggests that the quantum number I(J(p)) = 1/2 (2(+)) should be assigned to both the B-J(5732) a nd B-sJ(5850) mesons discovered recently. We also discuss reasons for the failure of group theory to produce correct mass relations for heav y quarkonia.