Speaker
Lisa Olbrich
(german)
Description
In the framework of the extended Linear Sigma Model we study four baryonic multiplets introduced via the mirror assignment, which allows chirally invariant mass terms. We first investigate formal features of a three-flavor treatment of the problem and then study the reduction to the two flavor case. In the latter, four baryonic doublets are present: the nucleon $N(939)$ and the Roper $N(1440)$ with positive parity, as well as the resonances $N(1535)$ and $N(1650)$ with negative parity. We determine the parameters of the model via a fit to known masses and decay properties of the aforementioned states, showing a good agreement of theory with data.
Primary author
Lisa Olbrich
(german)
Co-authors
Prof.
Dirk Rischke
(Goethe University)
Dr
Francesco Giacosa
(Frankfurt University)
Dr
Miklós Zétényi
(Wigner Research Center of Budapest)
