Gießen 2024 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 72: Poster

HK 72.51: Poster

Donnerstag, 14. März 2024, 17:15–18:45, HBR 14: Foyer

Exploring deuteron production with pion-deuteron femtoscopy — •Bhawani Singh — Technical University of Munich, James-Franck-Straße 1, 85748 Garching bei München

The ALICE Collaboration presents a new experimental approach to explore the interactions in three-hadron systems by analyzing femtoscopic correlation functions of deuteron-hadron pairs produced in high-multiplicity pp collisions at √s= 13 TeV at the LHC. These measurements provide unique information on the aspects of strongly-coupled systems, such as the genuine three-particle interaction, the formation of light nuclei, and the search for exotic bound states. A microscopic understanding of (anti)nuclei production in hadron-hadron collisions is the subject of discussion for experimental and theoretical efforts in nuclear physics. This topic is also very relevant for astrophysics since the rare production of antinuclei in our Universe could be a doorway to discover new physics. The results presented in this poster are obtained by measuring the pion-deuteron (π–d) femtoscopic correlations. The observed π–d correlations are compared with theoretical predictions, employing scattering parameters from conventional experiments for π^±–d systems. A noticeable discrepancy arises when calculations only consider the strong interaction between the pion and deuteron. The signal due to the presence of strongly decaying resonances in π^±–d systems indicates a delayed (anti)deuteron formation compared to hadrons in hadron-hadron collisions. This research was funded by BmBf Verbundforschung (05P21WOCA1 ALICE)