Structure of the bottomonium counterpart of X(3872)

The exotic hadron candidate X(3872) was observed in 2003 by Belle experiment. Although many experimental and theoretical studies have been conducted since the discovery of X(3872), the structure of X(3872) is still not completely understood. X(3872) has numerous interesting properties that have attracted the interest of many researchers. The paper on the discovery of X(3872) has over 2000 citations. X(3872) is thought to contain charm and anti-charm quark pairs as components. From the heavy flavor symmetry of QCD, X_b, a possible botmonium counterpart of X(3872), is believed to be present. We have studied the structure of X(3872) in the charmonimu and hadronic molecule hybrid model. We have studied the effect of the one-pion exchange interaction on BB*-B*B* system in the heavy hadron effective field theory.

We study X_b in the bottomonia χ_b1(3P), χ_b1(4P), and hadronic molecule BB*-B*B* hybrid model and discuss the structure of X_b and its observability.