Speaker
Francesco Giacosa
(Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Frankfurt)
Description
We present a simple alternative to the relativistic Breit–Wigner distribution that (i) contains left-threshold effects, (ii) is properly normalized for any decay width, (iii) can be obtained as an appropriate limit in which the decay width is a constant, (iv) is easily generalized to the multi-channel case (v) as well as to a convoluted form in case of a decay chain and (vi) is simple to deal with. We first apply this distribution to well-known and conventional hadrons and then extend it to the study of exotic hybrid mesons (such as $\eta_1(1855)$ and $\pi_1(1600)$ as well as to some unsettled baryonic resonances.
Primary author
Francesco Giacosa
(Institut für Theoretische Physik, Johann Wolfgang Goethe-Universität, Frankfurt)
Co-author
Vanamali Shastry
(Jan Kochanowski University)
