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

## $f_0(980)$ production in $D^+_s \to \pi^+ \pi^+ \pi^-$ and $D^+_s \to \pi^+ K^+ K^-$ decays

28 Sep 2017, 15:15
20m
Aula 2.3

### Speaker

Dr Jorgivan Morais Dias (Instituto de Física Corpuscular - Universidad de Valencia, Spain.)

### Description

We study the $D^+_s \to \pi^+ \pi^+ \pi^-$ and $D^+_s \to \pi^+ K^+ K^-$ decays adopting a mechanism in which the $D^+_s$ decays weakly into a $\pi^+$ and a $q\bar{q}$ component, which hadronizes into two pseudoscalar mesons. The final state interactions between these two pseudoscalar mesons is taken into account by using a chiral unitary approach in coupled channels, which gives rise to the $f_0(980)$ resonance. Hence, we obtain the invariant mass distribution of the pairs $\pi^+\pi^-$ and $K^+K^-$ after the decay of that resonance and compare our theoretical amplitudes with those available from the experimental data. Our results are in a fair agreement with the shape of these data, within large uncertainty, and a $f_0(980)$ signal is seen in both the $\pi^+\pi^-$ and $K^+K^-$ distributions. Predictions for the relative size of $\pi^+\pi^-$ and $K^+K^-$ distributions are made.

### Primary author

Dr Jorgivan Morais Dias (Instituto de Física Corpuscular - Universidad de Valencia, Spain.)

### Co-authors

Prof. Fernando Navarra (Instituto de Física, Universidade de São Paulo, Brazil.) Prof. Marina Nielsen (Instituto de Física, Universidade de São Paulo) Prof. Eulogio Oset (Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC)