Erlangen 2026 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 29: Hadron Structure and Spectroscopy V

HK 29.5: Vortrag

Donnerstag, 19. März 2026, 15:00–15:15, PHIL C 301

Femtoscopic study of the proton-proton and proton-deuteron systems in heavy-ion collisions at the LHC — •Wioleta Rzesa for the ALICE Germany collaboration — Technische Universität München, München, Germany

This work presents femtoscopic correlations of proton−proton (p−p) and proton−deuteron (p−d) pairs measured in Pb−Pb collisions at a center-of-mass energy of √s_NN = 5.02 TeV by the ALICE Collaboration. The p−p correlation functions allow the extraction of a precise power-law dependence of the nucleon femtoscopic radius on the pair transverse mass (m_T), as well as a linear dependence on the average charged-particle multiplicity. These dependencies are studied across three centrality intervals (0−10%, 10−30%, 30−50%) of Pb−Pb collisions. The measured p−d correlations are well described by both two-body and three-body calculations. This indicates that the femtoscopic observable in Pb−Pb collisions is not sensitive to short-distance features of the p−(p−n) interaction, owing to the relatively large inter-particle distances created in the heavy-ion environment at the LHC. Moreover, the proton m_T-scaling obtained for the p−p and p−d systems is compatible within one standard deviation of the experimental uncertainties. These findings provide new input for fundamental studies of the production and behavior of light (anti)nuclei under extreme conditions.

Keywords: femtoscopy, interations, proton, deuteron, ALICE