Eur. Phys. J. C (2016) 76: 522
https://doi.org/10.1140/epjc/s10052-016-4369-1

Regular Article - Theoretical Physics

R-matrix calculations for few-quark bound states

¹ Instituto de Física Teórica, UNESP, 01140-070, São Paulo, SP, Brazil
² Institute of Nuclear and Particle Physics and Department of Physics and Astronomy, Ohio University, Athens, OH, 45701, USA
³ College of Science and Engineering, Central State University, Wilberforce, OH, 45384, USA

^* e-mail: shalchi@ift.unesp.br

Received: 7 July 2016
Accepted: 12 September 2016
Published online: 26 September 2016

Abstract

The R-matrix method is implemented to study the heavy charm and bottom diquark, triquark, tetraquark, and pentaquarks in configuration space, as the bound states of quark–antiquark, diquark–quark, diquark–antidiquark, and diquark–antitriquark systems, respectively. The mass spectrum and the size of these systems are calculated for different partial wave channels. The calculated masses are compared with recent theoretical results obtained by other methods in momentum and configuration spaces and also by available experimental data.