Accessing the deuteron source with pion-deuteron femtoscopy in Pb-Pb collisions at √<i>s<sub>NN</sub></i>=5.02 TeV


Acharya S., Agarwal A., Rinella G. A., Aglietta L., Agnello M., Agrawal N., ...More

PHYSICAL REVIEW C, vol.112, no.6, 2025 (SCI-Expanded, Scopus) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 112 Issue: 6
  • Publication Date: 2025
  • Doi Number: 10.1103/mrp4-z4hh
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC
  • Yıldız Technical University Affiliated: Yes

Abstract

Femtoscopy of nonidentical particle pairs has been instrumental for precision measurements of both two-particle sources and the final-state interactions in high-energy elementary and heavy-ion collisions. The majority of measurements assessing the source properties are based on identical particle pairs, providing direct access to the characteristics of the single-particle source. The work in this paper demonstrates, via femtoscopy measurements of charged pion-deuteron pairs in Pb-Pb collisions at root s(NN) = 5.02 TeV, the feasibility of accessing the characteristics of the single-particle femtoscopic source by using particle pairs with large mass differences such as pions and deuterons. The first experimental results of the measurement of deuteron source sizes in ultrarelativistic heavy-ion collisions are presented. The results show good agreement with the trend derived from other charged hadrons such as pions, kaons, and protons as a function of transverse mass, indicating similar source properties.