Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-10-27
AIP Conf.Proc. 619 (2002) 731-734
Physics
High Energy Physics
High Energy Physics - Phenomenology
proc. of "Hadron '01," Protvino, Russia, Aug, 2001. 5 pages, uses ptptex.sty
Scientific paper
10.1063/1.1482528
Recently we have proposed a new level-classification scheme of hadrons with a manifestly covariant framework. In this scheme the requirement of chiral symmetry on the light quark leads to a prediction of existence of new type of scalars X_B, X_D and axial-vectors X_B^*,X_D^* as the chiral partners of ground state pseudoscalar B,D and vector B^*,D^* mesons, respectively. They belong to ``relativistic S-wave states,'' and are discriminated from the conventional P-wave mesons with j_q=1/2 appearing in the heavy quark effective theory. In this talk we examine the properties of these chiral mesons: The mass-splittings between the respective chiral partners are predicted to be equal, and the decay widths of one pion emission of X_B, X_D, X_B^* and X_D^* are to take the same value due to both chiral and heavy quark symmetries. Some experimental indications for existence of X_B and X_D^* are also given, which are consistent with the above prediction.
Ishida Muneyuki
Ishida Shin
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