https://doi.org/10.1051/epjconf/20148105005
Non-perturbative pion dynamics for the X(3872)
1 Institut für Theoretische Physik II, Ruhr-Universität Bochum, D-44780 Bochum Germany
2 Institute for Theoretical and Experimental Physics, 117218 Moscow, Russia
3 Forschungszentrum Jülich, Institute for Advanced Simulation, Institut für Kernphysik (Theorie) and Jülich Center for Hadron Physics, D-52425 Jülich, Germany
4 Helmholtz-Institut für Strahlen- und Kernphysik and Bethe Center for Theoretical Physics, Universität Bonn, D-53115 Bonn, Germany
5 National Research Nuclear University MEPhI, 115409, Moscow, Russia
6 Moscow Institute of Physics and Technology, 141700 Dolgoprudny, Moscow Region, Russia
a e-mail: vadimb@tp2.rub.de
Published online: 26 November 2014
We discuss the role of non-perturbative pion dynamics on the near-threshold resonant X(3872) charmonium state, which is assumed to be an S-wave DD̄* bound system. We calculate the contribution to the width of the X(3872) from the DD̄π intermediate state treated non-perturbatively and compare it with different approximate approaches. Further, we explore the quark-mass dependence of the pole position of the X(3872) state. We find that the trajectory of the X(3872) depends strongly on the assumed quark-mass dependence of the short-range interactions which can be determined in lattice QCD calculations.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
