Sergi Gonzalez-Solis: Phenomenological applications of rational approximants

Wednesday Mar 2, 2016, 1:00 PM → 2:00 PM Europe/Madrid

Seminar (IFAE)

Jelena Aleksic (IFAE), Joern Lange (IFAE Barcelona), Stefania Bordoni (IFAE)

In this talk I will first give a brief introduction to the Padé Approximants (PAs) method. PAs are rational functions of a polynomial of order N over a polynomial of order M, constructed in such a manner that they have the same Taylor expansion as the function to be approximated up to order N+M+1. These approximants are known to have better convergence properties than a Taylor expansion, property that I will exploit to parameterize physical observables which are difficult to describe from first principles. In particular, I will tackle gamma-gamma-meson vertex applied to both the space-and time-like energy regions.

1 Introduction and General Announcements

Speakers: Dr Jelena Aleksic (IFAE), Joern Lange (IFAE Barcelona), Stefania Bordoni (IFAE)

2 Presentation of the Week

Speaker: Mr Sergi Gonzàlez-Solís (IFAE-U.A.Barcelona)

3 Discussion

4 Pizza