Conveners
Parallel Session 3 - Goldstone Boson WG
- Mario Antonelli (LNF)
- Sebastien Descotes-Genon (CNRS/Univ. Paris-Sud 11)
- Andreas Juettner (University of Southampton)
- Emilie Passemar (Indiana University/JLab)
Shuangshi Fang
(Institute of High Energy Physics, Bejing)
6/30/15, 2:30 PM
Goldstone Boson Working Group
Talk
The BESIII Experiment at the Beijing Electron Positron Collider (BEPCII) has accumulated the world's largest samples of e+e- collisions in the tau-charm region. From a sample of 1.3 billions J/psi decays, BESIII has produced many new results in the decays of eta and eta'. This talk will review the current status of these analyses, especially on the Dalitz plot of eta/eta', observations of...
Marián Kolesár
(IPNP, Charles University, Prague)
6/30/15, 3:00 PM
Goldstone Boson Working Group
Talk
The eta to 3pi decays are a valuable source of information on low energy QCD. Yet they were not used for an extraction of the three flavor chiral symmetry breaking order parameters until now. We use a bayesian approach in the framework of resummed chiral perturbation theory to extract information on the quark condensate and pseudoscalar decay constant in the chiral limit, as well as the mass...
Bachir Moussallam
(IPN, Université Paris-Sud)
6/30/15, 3:20 PM
Goldstone Boson Working Group
Talk
The isospin violating eta->3pi decays are expected to provide the best observables for the determination of the u-d quark mass difference. However, using the chiral expansion of the Eta -> 3Pi amplitude in the physical region has proved problematic, as it fails to reproduce the recent precise measurements of the Dalitz plot parameters. In order to circumvent this problem, it was proposed to...
Pere Masjuan
(Johannes Gutenberg University, Mainz)
6/30/15, 3:40 PM
Goldstone Boson Working Group
Talk
A detailed and systematic study of the η − η mixing in Large-Nc ChPT will be presented [1], with special emphasis on the role of the next-to-next-to-leading order contributions in the combined p^2 and N_c expansion. At such order, loop corrections as well as OZI-violating pieces are relevant for an appropriate and stable numerical result for the mixing angle. Pseudoscalar masses as well as...
