Chiral extrapolation of the X(3872) binding energy

International Conference on Particle Physics and Astrophysics

Baru, V.^1,2 ; Epelbaum, E.^1 ; Filin, A.A.^1 ; Gegelia, J.^3,4 ; Nefediev, A.V.^2,5

Institut für Theoretische Physik II, Ruhr-Universität Bochum, Bochum

D-44780, Germany^1

Institute for Theoretical and Experimental Physics, B.Cheremushkinskaya 25, Moscow

117218, Russia^2

Forschungszentrum Jülich, Institute for Advanced Simulation, Institut für Kernphysik (Theorie), Julich Center for Hadron Physics, Julich

D-52425, Germany^3

Tbilisi State University, Tbilisi

0186, Georgia^4

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe highway 31, Moscow

115409, Russia^5

关键词: Charmonium;    Chiral extrapolation;    Lattice calculations;    Physical limits;    Quantum field theory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/675/2/022017/pdf
DOI  :  10.1088/1742-6596/675/2/022017

来源: IOP

【 摘 要 】

The role of pion dynamics in the X(3872) charmonium-like state is studied in the framework of a renormalisable effective quantum field theory approach and they are found to play a substantial role in the formation of the X. Chiral extrapolation from the physical point to unphysically large pion masses is performed and the results are confronted with the lattice predictions. The proposed approach overrides the gap between the lattice calculations and the physical limit in mπ.