Heavy Barions and new Interacting Boson Fermion Fermion Model results (Hugo Garcia Tecocoatzi, INFN Genova)

Novembre 8, 2023@2:00 pm–3:00 pm
Aula 500 e online

Seminario di Fisica Teorica-

In the first part of the presentation, I will present a study of the spectra and strong decay widths of heavy baryons. The masses of single heavy baryons up to the D-wave have been calculated within a constituent quark model, employing both the three-quark and quark-diquark schemes. The decay widths of the ground and excited single heavy baryons into the heavy single baryon-(vector/pseudoscalar) meson pairs and the (octet/ decuplet) baryon-
(pseudoscalar/vector) heavy meson pairs, have been calculated. Moreover, I will discuss why the presence or absence of the ρ-mode excitations in the experimental spectrum is the key to distinguishing between the quark-diquark and three-quark behaviours, as it was originally pointed out in. The quantum number assignments and predictions for mass spectra and strong-decay widths are in agreement with the available data. These findings provide valuable
guidance for future measurements in experiments as ATLAS, CMS, LHCb, Belle, and Belle II.
In the second part of this talk, I will present a new application of the Interacting Boson Fermion-Fermion Model (IBFFM) for describing double charge exchange reactions. The study of double charge exchange reactions induced by heavy ions involving candidate nuclei for neutrinoless double beta decay is a complex task carried out by the NUMEN collaboration [5], to which I belong. This investigation faces the intricacies of complex odd-odd intermediate nuclei in sequential double charge exchange processes. I will offer a comprehensive description of heavy odd-odd nuclei using the (IBFFM). Additionally, I will outline the methodology for describing transfer operators within this framework.
Finally, I will explore the potential applications of our results in future reaction codes for describing double charge exchange reactions.

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