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Recently we have proposed a new level-classification scheme of hadrons with amanifestly covariant framework. In this scheme the requirement of chiralsymmetry on the light quark leads to a prediction of existence of new type ofscalars X_B, X_D and axial-vectors X_B^*,X_D^* as the chiral partners of groundstate pseudoscalar B,D and vector B^*,D^* mesons, respectively. They belong to``relativistic S-wave states,'' and are discriminated from the conventionalP-wave mesons with j_q=1/2 appearing in the heavy quark effective theory. Inthis talk we examine the properties of these chiral mesons: The mass-splittingsbetween the respective chiral partners are predicted to be equal, and the decaywidths of one pion emission of X_B, X_D, X_B^* and X_D^* are to take the samevalue due to both chiral and heavy quark symmetries. Some experimentalindications for existence of X_B and X_D^* are also given, which are consistentwith the above prediction.Comment: proc. of "Hadron '01," Protvino, Russia, Aug, 2001. 5 pages, uses  ptptex.st

Property of Chiral Scalar and Axial-Vector Mesons in Heavy-Light Quark Systems