Chiral effective theory with a light scalar and lattice QCD

Friday March 23, 14:30hs -  Seminar room

Speaker: Pedro Talavera (Universitat de Barcelona)


We extend the usual chiral perturbation theory framework to allow the inclusion of a light dynamical isosinglet scalar.

Using lattice QCD results, and a few phenomenological inputs, we explore the parameter space of the effective theory. We discuss the S-wave pion-pion scattering lengths, extract the average value of the two light quark masses and evaluate the impact of the dynamical singlet field in some low-energy constants.


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