Coupled-channel meson-meson scattering in the diabatic framework

被引：11

作者：

Bruschini, R. ^{[1
]}

Gonzalez, P. ^{[1
,2
]}

机构：

[1] Univ Valencia CSIC, Unidad Teor, Inst Fis Corpusc, E-46980 Paterna, Valencia, Spain

[2] Univ Valencia, Dept Fis Teor, E-46100 Burjassot, Valencia, Spain

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 07期

基金：

欧盟地平线“2020”;

关键词：

HEAVY; PENTAQUARK; LIGHT;

D O I：

10.1103/PhysRevD.104.074025

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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.

引用

页数：16

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