Light nuclei production in pp and pA collisions in the Baryon Canonical Ensemble

Abstract

The increase in yields of light nuclei with charged particle multiplicity, as reported by the ALICE collaboration at CERN in p-p and p-Pb collisions at the LHC energy is investigated in the thermal hadron resonance gas model. The model is extended to account for exact baryon number conservation. The focus is on the production of protons, deuterons, ${}^3$He, and ${}_{\Lambda }^3$H. A very good description of proton and deuteron yields is obtained as a function of charged particle multiplicity in the mid-rapidity region using the same fixed temperature as in central Pb-Pb collisions. The yields of light nuclei ${}^3$He and ${}_{\Lambda }^3$H though qualitatively explained as a function of multiplicity, are lower than the model expectation. One of the possible reasons could be that for ${}^3$He and ${}_{\Lambda }^3$H, the chemical equilibrium is not yet reached at small multiplicities.

12 pages, 3 captioned figures

References in corpus (7)

• The QCD Equation of State to $\mathcal{O}({\mu }_B^6)$ from Lattice QCD
• Multiplicity dependence of (multi-)strange baryons in the canonical ensemble with phase shift corrections
• On coalescence as the origin of nuclei in hadronic collisions
• Hypertriton production in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Energy dependence of light hypernuclei production in heavy-ion collisions from a coalescence and statistical-thermal model perspective
• Light nuclei in the hadron resonance gas
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Cited by in corpus (6)

• Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• The imprint of conservation laws on correlated particle production
• Measurement of ${}_{\Lambda }^3\mathrm{H}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Measurement of the production of (anti)nuclei in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$ TeV
• Measurement of (anti)alpha production in central Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• More uses for Thermal Models