Feeddown contributions from unstable nuclei in relativistic heavy-ion collisions

  • We estimate the feeddown contributions from decays of unstable A=4 and A=5 nuclei to the final yields of protons, deuterons, tritons, 3He, and 4He produced in relativistic heavy-ion collisions at sNN>2.4 GeV, using the statistical model. The feeddown contribution effects do not exceed 5% at LHC and top RHIC energies due to the large penalty factors involved, but are substantial at intermediate collision energies. We observe large feeddown contributions for tritons, 3He, and 4He at sNN≲10 GeV, where they may account for as much as 70% of the final yield at the lower end of the collision energies considered. Sizable (>10%) effects for deuteron yields are observed at sNN≲4 GeV. The results suggest that the excited nuclei feeddown cannot be neglected in the ongoing and future analysis of light nuclei production at intermediate collision energies, including HADES and CBM experiments at FAIR, NICA at JINR, RHIC beam energy scan and fixed-target programmes, and NA61/SHINE at CERN. We further show that the freeze-out curve in the T-μB plane itself is affected significantly by the light nuclei at high baryochemical potential.

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Author:Volodymyr VovchenkoORCiDGND, Benjamin DönigusORCiDGND, Behruz KardanORCiDGND, Manuel LorenzORCiDGND, Horst StöckerORCiDGND
Parent Title (English):Physics Letters B.
Place of publication:Amsterdam [u.a.]
Document Type:Article
Date of Publication (online):2020/08/31
Date of first Publication:2020/08/31
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2020/09/14
Tag:excited nuclei; light nuclei production; statistical model
Institutes:Physik / Physik
Wissenschaftliche Zentren und koordinierte Programme / Frankfurt Institute for Advanced Studies (FIAS)
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Licence (German):License LogoCreative Commons - Namensnennung 4.0