Chiral dispersive calculations of pion-pion scattering and Regge theory

por Jose Ramon Pelaez (Universidad Complutense de Madrid)

viernes 23 ene. 2004 12:00 → 13:00 Europe/Madrid

Sala Seminarios IFIC (Edf. Institutos de Investigación)

I will introduce Chiral Dispersive calculations and how they have recently awake great interest because they could ellucidate the chiral structure of the QCD vacuum, and they would represent one of the few instances where hadronic theories are ahead of the experiments recently carried out at CERN. Next I will review the set of papers where we have questioned the extremely high precision claimed in chiral dispersive calculations, which fail to satisfy several sum rules. I present a recent Regge description of high energy pion-pion data, not described by these calculations, that supports our critizisms. The talk is based on: J. R. Peláez and F.J. Ynduráin. PRD68:074005,2003 F.J. Ynduráin. ‘QCD@Work’, hep-ph/0310206 J. R. Peláez and F.J. Ynduráin. hep-ph/0312187