Abstract
The deuteron yield in Pb+Pb collisions at is consistent with thermal production at a freeze out temperature of . The existence of deuterons with binding energy of 2.2 MeV at this temperature was described as “snowballs in hell” [P. Braun-Münzinger, B. Dönigus, and N. Löher, CERN Courier, August 2015]. We provide a microscopic explanation of this phenomenon, utilizing relativistic hydrodynamics and switching to a hadronic afterburner at the above-mentioned temperature of . The measured deuteron spectra and coalescence parameter are reproduced without free parameters, only by implementing experimentally known cross sections of deuteron reactions with hadrons, most importantly .
3 More- Received 15 September 2018
- Revised 7 December 2018
DOI:https://doi.org/10.1103/PhysRevC.99.044907
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society
Physics Subject Headings (PhySH)
Synopsis
Explaining Light Ion Production in High-Energy Collisions
Published 11 April 2019
Pions could catalyze reactions between protons and neutrons, allowing the stable production of deuterons in high-energy ion-ion collisions.
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