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Deuterons at LHC: "snowballs in hell" via hydrodynamics and hadronic afterburner
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Deuterons at LHC: "snowballs in hell" via hydrodynamics and hadronic afterburner
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The deuteron yield in Pb+Pb collisions at $\sqrt{s_{NN}} = 2.76$ TeV is consistent with thermal production at a freeze-out temperature of $T = 155$ MeV. The existence of deuterons with binding energy of 2.2 MeV at this temperature was described as "snowballs in hell". We provide a microscopic explanation of this phenomenon, utilizing relativistic hydrodynamics and switching to a hadronic afterburner at the above mentioned temperature of $T = 155$ MeV. The measured deuteron $p_T$-spectra and coalescence parameter $B_2(p_T)$ are reproduced without free parameters, only by implementing experimentally known cross-sections of deuteron reactions with hadrons, most importantly $\pi d \leftrightarrow \pi n p$.
Forward citations
Cited by 3 Pith papers
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Hypernucleus production in p+Au reactions at the FAIR facility
UrQMD plus coalescence predicts measurable yields of hypernuclei such as 3_Lambda H, 4_Lambda H, Xi N and Xi NN in p+Au reactions at FAIR energies.
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