Charm Hadrons in pp collisions at LHC energy within a Coalescence plus Fragmentation approach

Abstract

The recent experimental measurements on $pp$ collisions at $\sqrt{s}=5.02\mathrm{TeV}$ have shown a very large abundance of heavy baryon production corresponding to a ratio of ${\Lambda }_c/D^0\sim 0.6$, about one order of magnitude larger than what measured in $e^{+}{e}^{-}$, $ep$ collisions and even in $pp$ collisions at LHC, but at forward rapidity. We apply for the first time to $pp$ collisions a quark coalescence plus fragmentation approach developed for $AA$ collisions, assuming the formation of Hot QCD matter at finite temperature. An approach that has correctly predicted a ${\Lambda }_c/D\sim O(1)$ in AA collisions at RHIC energy. We calculate the heavy baryon/meson ratio and the $p_T$ spectra of charmed hadrons with and without strangeness content: $D^0$, $D_s$, ${\Lambda }_c^{+}$, ${\Xi }_c$ and ${\Omega }_c$ in $pp$ collisions at top LHC energies, finding a satisfactory result for the measured ${\Lambda }_c^{+}/D^0$ and the ${\Xi }_c/D^0$ without any specific tuning of parameters to $pp$ collisions. At variance with other approaches a coalescence approach predicts also a significant production of ${\Omega }_c$ such that ${\Omega }_c/D^0\sim O(10^{-1})$ .

arXiv comment8 pages, 5 figures; modifications in Figures 1,2,3,4,5 and corrected typos

References in corpus (24)

• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Parton coalescence and antiproton/pion anomaly at RHIC
• Hadron production in heavy ion collisions: Fragmentation and recombination from a dense parton phase
• Elliptic flow at large transverse momenta from quark coalescence
• Parton coalescence at RHIC
• QCD Predictions for Charm and Bottom Production at RHIC
• Parton-Hadron-String Dynamics: an off-shell transport approach for relativistic energies
• Quark Coalescence for Charmed Mesons in Ultrarelativistic Heavy-Ion Collisions
• One fluid to rule them all: viscous hydrodynamic description of event-by-event central p+p, p+Pb and Pb+Pb collisions at $\sqrt{s}=5.02$ TeV
• Charmed Hadrons from Coalescence plus Fragmentation in relativistic nucleus-nucleus collisions at RHIC and LHC
• Charm-Baryon Production in Proton-Proton Collisions
• Combined analysis of charm-quark fragmentation-fraction measurements
• Collectivity and electromagnetic radiation in small systems
• Quark Coalescence based on a Transport Equation
• First measurement of ${\Lambda }_c$ baryon production in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200 GeV
• Measurement of ${\mathrm{D}}^0$, ${\mathrm{D}}^{+}$, ${\mathrm{D}}^{\ast +}$ and ${{\mathrm{D}}^{+}}_s$ production in pp collisions at $\sqrt{\text{s}}=5.02\mathbf{TeV}$ with ALICE
• ${\Lambda }_{\mathrm{c}}^{+}$ production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Charge radii of light and heavy mesons
• Charmed and Bottom Baryons: a Variational Approach based on Heavy Quark Symmetry
• Charmed hadron chemistry in relativistic heavy-ion collisions
• ${\Lambda }_c^{\pm }$ production in pp collisions with a new fragmentation function
• Heavy-light flavour correlations of anisotropic flows at LHC energies within event-by-event transport approach
• Resonance Recombination Model and Quark Distribution Functions in the Quark-Gluon Plasma
• Study of collective anisotropies $v_2$ and $v_3$ and their fluctuations in $pA$ collisions at LHC within a relativistic transport approach

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• Observation of a multiplicity dependence in the $p_{\mathrm{T}}$-differential charm baryon-to-meson ratios in proton-proton collisions at $\sqrt{s}=13$ TeV
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• Measurement of the production cross section of prompt ${\Xi }_{\mathrm{c}}^0$ baryons at midrapidity in pp collisions at $\sqrt{s}$ = 5.02 TeV
• Charm production and fragmentation fractions at midrapidity in pp collisions at $\sqrt{s}=13$ TeV
• First measurement of ${\Lambda }_{\mathrm{c}}^{+}$ production down to $p_{\mathrm{T}}=0$ in pp and p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Fluid dynamics of charm quarks in the quark--gluon plasma
• Multi-charmed and singled charmed hadrons from coalescence: yields and ratios in different collision systems at LHC
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• Study of charm hadronization with prompt ${\Lambda }_{\mathrm{c}}^{+}$ baryons in proton-proton and lead-lead collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
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• Observation of strangeness enhancement with charmed mesons in high-multiplicity $p\mathrm{Pb}$ collisions at $\sqrt{s_{\mathrm{NN}}}=8.16$TeV
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• Measurement of ${\Omega }_{\mathrm{c}}^0$ baryon production and branching-fraction ratio $\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\mathrm{e}}^{+}{\nu }_{\mathrm{e}})/\mathrm{BR}({\mathrm{\Omega }}_{\mathrm{c}}^0\to {\mathrm{\Omega }}^{-}{\pi }^{+})$ in pp collisions at $\sqrt{s}$ = 13 TeV
• Measurement of the non-prompt D-meson fraction as a function of multiplicity in proton$-$proton collisions at $\sqrt{s}=13$ TeV
• Universal Energy Dependence of Measured Temperatures for Baryons Produced in Heavy-ion Collisions
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• Measurement of beauty production via non-prompt charm hadrons in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Multiplicity dependence of charm baryon and charm meson production in pPb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 8.16 TeV
• Charm fragmentation fractions and $\mathrm{c}\overline{\mathrm{c}}$ cross section in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• In-medium hadronization of heavy quarks and its effect on charmed meson and baryon distributions in heavy-ion collisions
• Transverse momentum and multiplicity dependence of ${\Lambda }_c^{+}/D^0$ ratio in $pp$ collisions at $\sqrt{s}=13$ TeV
• D-meson production via sequential hadronization in high-energy nuclear collisions
• Event shape Engineering analysis of D meson in ultrarelativistic heavy ion collisions
• Studies of beauty hadron and non-prompt charm hadron production in pp collisions at $\sqrt{s}$=13 TeV within a transport model approach
• Measurement of the production cross section of prompt ${\Xi }_{\mathrm{c}}^0$ baryons in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV