Speaker
Description
The study of exotic resonances provides insights into the non-perturbative regime of Quantum Chromodynamics (QCD). Short-lived resonances such as ( f_0(980) ), ( f_1(1285) ), and ( f_2(1270) ) have been extensively investigated to explore their internal structures, which remain uncertain with possibilities including tetraquark states or meson-meson molecular states. Among them, the ( f_0(980) ) resonance, with a lifetime of approximately 3--5 fm/( c ) as reported by ALICE, is particularly sensitive to re-generation and re-scattering processes in the hadronic phase, making it highly suitable for such studies.
This contribution reports results by ALICE on the ( f_0(980) ) resonance in pp and p-Pb collisions at LHC energy, reconstructing the resonance was reconstructed via its ( \pi^+ \pi^- ) decay channel. New measurements on ( f_0(980) ) resonance production, focusing on its invariant mass spectra and integrated yields were performed. Comparisons with theoretical models were conducted to further understand its internal structure and, the role of exotic resonances as effective probes of the hadronic phase. The increase in statistics provided by the high luminosity of ALICE Run 3 has enabled more precise measurements of exotic resonances, offering additional insights into their properties. Moreover, the production cross-section of ( f_0(980) ) and its ratio to stable hadron yields were studied to provide complementary insights to the Run 2 results, focusing on the feasibility and performance of the measurement with the current Run 3 data. This analysis provides the latest results on the production of ( f_0(980) ), serving as a valuable reference for understanding the characteristics of the hadronic phase.
