HADRON 2017

An Effective Theory approach to B¯s mesons involving SU(3) heavy meson symmetry and constituent quark-model states

27 Sept 2017, 11:55

20m

Sala Menor

Talk Spectroscopy of mesons Spectroscopy of mesons

Speaker

Pedro Fernandez-Soler (Instituto de Fisica Corpuscular (CSIC-University of Valencia))

Description

The bottom partners of the $D_{s0}(2317)$ and $D_{s1}(2460)$ have not been measured yet but the existence of these bottom-strange $J^P=0^{+}$ and $1^{+}$ states is motivated by heavy quark flavor symmetry (HQFS) and heavy quark spin symmetry (HQSS).

In this talk we will present the predictions for such heavy quark partners using a unitarized effective approach involving $SU(3)$ chiral heavy meson symmetry and incorporating explicit di-quark Fock components ($Q\overline{q}$) to the theory in a HQFS/HQSS consistent way.

We take advantage of the energy levels spectrum for $0^{+}$ and $1^{+}$ $B_s$ mesons obtained in a recent lattice QCD simulation to constrain the coupling of the $Qq$ components. By fitting the lattice QCD energy levels with the energy levels obtained with the model in finite volume, we are able to make predictions for these exotic ${\overline{B}}_s$ mesons. Our predictions are compatible with the lattice QCD results and previous heavy meson chiral perturbation theory predictions. In the same line, results for charm-strange mesons will be presented.

Presentation materials

Pedro-Fernandez-Soler-beamer-hadron.pdf