New Exotic Meson and Baryon Resonances from Doubly Heavy Hadronic Molecules

Abstract

We predict several new exotic doubly-heavy hadronic resonances, inferring from the observed exotic bottomonium-like and charmonium-like narrow states X(3872), Z b (10610), Z b (10650), Z c (3900), and Z c (4020/4025). We interpret the binding mechanism as mostly molecular-like isospin-exchange attraction between two heavy-light mesons in a relative S-wave state. We then generalize it to other systems containing two heavy hadrons which can couple through isospin exchange. The new predicted states include resonances in meson-meson, meson-baryon, baryon-baryon, and baryon-antibaryon channels. These include those giving rise to final states involving a heavy quark Q = c, b and antiquark

The hidden-charm pentaquark and tetraquark states

“…In Ref. [421], Karliner and Rosner also suggested the existence of doubly heavy molecular pentaquarks. The above hidden-bottom and doubly heavy pentaquark states from the OBE and OPE models may be accessible at future experiments.…”

“…[421]. They also interpreted the Z b (10610) and Z b (10650) as the weakly bound molecular states composed of theBB * andB * B * , respectively.…”

“…In Ref. [421], Karliner and Rosner interpreted the Z c (3900), together with the X(3872), as weakly bound molecular states with the DD * component and the Z c (4020)/Z c (4025) as a D * D * molecular state.…”

“…One has good reasons to expect the existence of the hidden-charm baryonium [423,421], which is the six-quark matter.…”

Hidden-charm pentaquarks as a meson-baryon molecule with coupled channels for D¯(*)ΛYamaguchi1, Santopinto2 2017Phys. Rev. D652410View full textAdd to dashboardCite

“…The compact pentaquark states have been discussed by the (di)quark model [4][5][6][7][8] and Gürsey-Radicati inspired formula [9]. The hadronic molecules have been studied by the meson-baryon coupled-channel approach [10][11][12][13][14][15][16][17][18] and the QCD sum rules [19,20]. On the other hand, the threshold enhancement by the anomalous triangle singularity is discussed in Refs.…”