2 papers
hep-ph1999
The Linear Sigma Model at Work: Succesful Postdictions for Pion Scattering
J. L. Lucio, M. Napsuciale, M. Ruiz-Altaba
We enforce chiral Ward identities on the vertices of the linear sigma model to take into account the width of the scalar sigma, considered as a true physical resonance. We consider…
hep-th1998
On the Initial Conditions for Pre-Big-Bang Cosmology
M. Borunda, M. Ruiz-Altaba
The beautiful scenario of pre-big-bang cosmology is appealling not only because it is more or less derived from string theory, but also because it separates clearly the problem of…