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Rios, G. ; Gómez Nicola, Ángel ; Hanhart, C. ; Peláez Sagredo, José Ramón | Amer Inst Physics | 2008We review our recent study of the pion mass dependence of the p and a resonances, generated from one-loop SU(2) Chiral Perturbation Theory (ChPT) with the Inverse Amplitude Method (IAM). In order to properly account for the Adler zero region, we[...]texto impreso
We review our work on the ? and ? resonances derived from the Inverse Amplitude Method. In particular, we study the leading 1/N_c behavior of the resonances masses and widths and their evolution with changing m_?. The 1/Nc expansion gives a clea[...]texto impreso
Llanes Estrada, Felipe José ; Guo, F.-K. ; Hanhart, C. ; Cleven, M | American Institute of Physics | 2011The pion mass dependence of the pion vector form factor is investigated using the Omnes representation. Our prediction agrees with later lattice results quite well. The nice agreement of the pion mass dependence of the scattering lengths of the [...]texto impreso
We discuss in general terms pole trajectories of resonances coupling to a continuum channel as some strength parameter is varied. It is demonstrated that, regardless of the underlying dynamics, the trajectories of poles that couple to the contin[...]texto impreso
Peláez Sagredo, José Ramón ; Hanhart, C. ; Nebreda Manjón, Jenifer ; Rios, G. | American Institute of Physics | 2010In this talk we briefly review how the unitarization of Chiral Perturbation Theory with dispersion relations can successfully describe the meson- meson scattering data and generate light resonances, whose mass, width and nature can be related to[...]texto impreso
Berengut, J. C. ; Epelbaum, E. ; Flambaum, V. V. ; Hanhart, C. ; Meißner, U.-G ; Nebreda, G. ; Peláez Sagredo, José Ramón | Amer Physical Soc | 2013-04-10The quark mass dependences of light-element binding energies and nuclear scattering lengths are derived using chiral perturbation theory in combination with nonperturbative methods. In particular, we present new, improved values for the quark ma[...]
