Exotic Mesons with Hidden Bottom Near Thresholds

Abstract

We discuss exotic meson spectroscopy near open bottom thresholds. Assuming the exotic mesons as \({B^{(\ast)}\bar{B}^{(\ast)}}\) molecular states, we study the interaction among two heavy mesons in terms of the one boson exchange potential model. It is shown that masses of Z b (10610) and Z b (10650) are reproduced as \({B^{(\ast)}\bar{B}^{(\ast)}}\) bound and resonance states. Besides, we also show that \({B^{(\ast)}\bar{B}^{(\ast)}}\) molecular states having various exotic quantum numbers can exist around the thresholds. By contrast, there are no \({D^{(\ast)}\bar{D}^{(\ast)}}\) molecular states having exotic quantum numbers.