Application of nonperturbative techniques of calculation in exotic systems in the charm and bottom sectors

• Grant number: 15/07674-2
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: October 01, 2015
• End date: September 30, 2019
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Fernando Silveira Navarra
• Grantee: Jorgivan Morais Dias
• Host Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 12/50984-4 - Hadron Physics, AP.TEM
• Associated scholarship(s): 16/22561-2 - Study of the XYZ systems through three-body interactions using Faddeev equations, BE.EP.PD

Abstract

In this project we intend to use two important nonperturbative techniques of calculation, QCD Sum Rules and Effective Theories, to study different charmoniumlike and bottomoniumlike states with exotic structure. Such states are commonly labelled with $XYZ$ letters followed by their masses. In particular, from the point of view of the QCD Sum Rules, we will investigate the tetraquark or molecular nature of the charged structures $Z_c(4025)$ e $Z_c(4200)$ in order to determine their more likely quantum numbers. Using the Effective Theories, we will solve the Faddeev equations to study three-body meson-meson-baryon and three meson interactions in order to look for resonances and bound states formed in such systems. Our main goal is to explain the new charmonium and bottomoniumlike states and predict new states to be search at the existing experimental facilities around the world. (AU)