25-29 September 2017
Salamanca, Spain
Europe/Zurich timezone

## An Effective Theory approach to $\bar{B}_s$ mesons involving $SU(3)$ heavy meson symmetry and constituent quark-model states

27 Sep 2017, 11:55
20m
Sala Menor

#### Sala Menor

Talk 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 ($Q\bar{q}$) 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 $\bar{B}_s$ 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.

### Primary authors

Pedro Fernandez-Soler (Instituto de Fisica Corpuscular (CSIC-University of Valencia)) Miguel Albaladejo (Universidad de Murcia) Juan M Nieves (IFIC (CSIC-UV)) Pablo G. Ortega (University of Salamanca)