Winter Meeting 2025

Multi-strange baryon spectroscopy in charm decays at LHCb

4 Feb 2025, 16:50

25m

Aula Magna Enric Casassas (Facultat de Física)

Speaker

Lukas Calefice (Universitat de Barcelona/ICCUB)

Description

The study of excitation spectra of hadrons is a crucial experimental tool to understand the binding mechanism of quarks in the strong interaction. While big advances have been made in recent years in the study of heavy-flavour hadrons containing a charm (c) or beauty (b) quark, the field of multi-strange (s) baryons, especially ${\mathrm{\Xi }}^{0,-}$ (ssu, ssd) and ${\mathrm{\Omega }}^{-}$ (sss), is largely unexplored. To date, only a limited amount of states (10 for ${\mathrm{\Xi }}^{0,-}$ and 4 for ${\mathrm{\Omega }}^{-}$) are known, most of them seen with very low statistics in small fixed-target experiments in the 1980s but never experimentally confirmed. The vast LHCb dataset of charm hadrons such as the ${\mathrm{\Omega }}_c^0$ baryon offers a rare opportunity to search for missing states in the excitation spectra of strange baryons by looking at decays of the ${\mathrm{\Omega }}_c^0$ baryon such as ${\mathrm{\Omega }}_c^0\to {\mathrm{\Xi }}^{-}{\pi }^{+}{K}^{-}{\pi }^{+}$. I will discuss some ideas and preliminary results on how a search at LHCb can be performed.

Presentation materials

LukasCalefice_ICCUB_WinterMeeting.pdf