TY  - JOUR
AU  - Bruschini, R.
AU  - Gonzalez, P.
PY  - 2021
DA  - 2021//
TI  - Coupled-channel meson-meson scattering in the diabatic framework
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 074025
EP  - 16pp
VL  - 104
IS  - 7
PB  - Amer Physical Soc
AB  - We apply the diabatic framework, a QCD-based formalism for the unified study of quarkoniumlike systems in terms of heavy quark-antiquark and open-flavor meson-meson components, to the description of coupled-channel meson-meson scattering. For this purpose, we first introduce a numerical scheme to find the solutions of the diabatic Schrodinger equation for energies in the continuum, then we derive a general formula for calculating the meson-meson scattering amplitudes from these solutions. We thus obtain a completely nonperturbative procedure for the calculation of open-flavor meson-meson scattering cross sections from the diabatic potential, which is directly connected to lattice QCD calculations. A comprehensive analysis of various elastic cross sections for open-charm and open-bottom meson-meson pairs is performed in a wide range of the center-of-mass energies. The relevant structures are identified, showing a spectrum of quasiconventional and unconventional quarkoniumlike states. In addition to the customary Breit-Wigner peaks, we obtain nontrivial structures such as threshold cusps and minimums. Finally, our results are compared with existing data and with results from our previous bound-state-based analysis, finding full compatibility with both.
SN  - 2470-0010
UR  - https://arxiv.org/abs/2107.05459
UR  - https://doi.org/10.1103/PhysRevD.104.074025
DO  - 10.1103/PhysRevD.104.074025
LA  - English
N1  - WOS:000753716600003
ID  - Bruschini+Gonzalez2021
ER  -