Title: One-dimensional pion, kaon, and proton femtoscopy in Pb-Pb collisions at s NN = 2.76 TeV

Journal Article · · Physical Review. C. Nuclear Physics
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The size of the particle emission region in high-energy collisions can be deduced using the femtoscopic correlations of particle pairs at low relative momentum. Such correlations arise due to quantum statistics and Coulomb and strong final state interactions. In this paper, results are presented from femtoscopic analyses of π± π±, K± K±, K$$0\atop{S}$$K$$0\atop{S}$$, pp , and $$\overline{p}$$ $$\overline{p}$$ correlations from Pb-Pb collisions at s NN = 2.76 TeV by the ALICE experiment at the LHC. One-dimensional radii of the system are extracted from correlation functions in terms of the invariant momentum difference of the pair. The comparison of the measured radii with the predictions from a hydrokinetic model is discussed. The pion and kaon source radii display a monotonic decrease with increasing average pair transverse mass mT which is consistent with hydrodynamic model predictions for central collisions. Lastly, the kaon and proton source sizes can be reasonably described by approximate mT scaling.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
European Organization for Nuclear Research (CERN), Geneva (Switzerland); National Science Foundation (NSF); State Committee of Science (SCS); USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC); World Federation of Scientists (WFS); Worldwide LHC Computing Grid (WLCG)
Contributing Organization:
ALICE Collaboration
Grant/Contract Number:
AC02-05CH11231; AC05-00OR22725; AC52-07NA27344
OSTI ID:
1341545
Report Number(s):
LLNL-JRNL-737482
Journal Information:
Physical Review. C. Nuclear Physics, Journal Name: Physical Review. C. Nuclear Physics Journal Issue: 5 Vol. 92; ISSN 0556-2813
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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