Production of light flavor and single-charmed hadrons in $pp$ collisions at $\sqrt{s}=5.02$ TeV in an equal-velocity quark combination model

Abstract

We apply an equal-velocity quark combination model to study the production of light-flavor hadrons and single-charmed hadrons at midrapidity in $pp$ collisions at $\sqrt{s}=5.02$ TeV. We find experimental data for $p_T$ spectra of $\Omega$ and $\varphi$ exhibit a quark number scaling property, which is a clear signal of quark combination mechanism at hadronization. Experimental data for $p_T$ spectra of $p$, $\Lambda$, $\Xi$, $\Omega$, $\varphi$ and $K^{\ast 0}$ are systematically described by the model. The non-monotonic $p_T$ dependence of $\Omega /\varphi$ ratio is naturally explained and we find it is closely related to the shape of the logarithm of strange quark $p_T$ distribution. Using $p_T$ spectra of light-flavor quarks obtained from light-flavor hadrons and a $p_T$ spectrum of charm quarks which is consistent with perturbative QCD calculations, the experimental data for differential cross-sections of $D^{0,+}$, $D_s^{+}$ and ${\Lambda }_c^{+}$ as the function of $p_T$ are systematically described. We predict the differential cross-sections of ${\Xi }_c^{0,+}$ and ${\Omega }_c^0$. The ratio ${\Xi }_c^{0,+}/D^0$ in our model is about 0.16 and ${\Omega }_c^0/D^0$ is about 0.012 due to the cascade suppression of strangeness. In addition, the predicted ${\Xi }_c^{0,+}/D^0$ and ${\Omega }_c^0/D^0$ ratios exhibit the non-monotonic dependence on $p_T$ in the low $p_T$ range.

11 pages, 9 figures

References in corpus (14)

• Big-Bang Nucleosynthesis
• Observation of long-range near-side angular correlations in proton-lead collisions at the LHC
• Evidence for collective multi-particle correlations in pPb collisions
• Measurements of $\varphi$ meson production in relativistic heavy-ion collisions at RHIC
• Charm-Baryon Production in Proton-Proton Collisions
• Strange and Multi-strange Particle Production in Au+Au Collisions at $\sqrt{s_{NN}}$ = 62.4 GeV
• Charm Hadrons in pp collisions at LHC energy within a Coalescence plus Fragmentation approach
• $\varphi$ and $\Omega$ production in relativistic heavy ion collisions in a dynamical quark coalescence model
• 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
• Hadron production by quark combination in central Pb+Pb collisions at $\sqrt{s_{NN}}=17.3$ GeV
• Quark number scaling of hadronic $p_T$ spectra and constituent quark degree of freedom in $p$-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• New insights into hadron production mechanism from $p_T$ spectra in $pp$ collisions at $\sqrt{s}=7$ TeV
• Hyperon/meson ratios in rare high-multiplicity $pp$ collisions at energies available at the Large Hadron Collider, and potential signatures for mini-quark-gluon plasma formation
• Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions

Cited by in corpus (8)

• 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
• Towards the understanding of heavy quarks hadronization: from leptonic to heavy-ion collisions
• Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions
• Signals of quark combination at hadronization in $pp$ collisions at $\sqrt{s}=200$ GeV
• Transverse momentum and multiplicity dependence of ${\Lambda }_c^{+}/D^0$ ratio in $pp$ collisions at $\sqrt{s}=13$ TeV
• Charm fragmentation fractions and $\mathrm{c}\overline{\mathrm{c}}$ cross section in p$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Production of Strange and Charm Hadrons in Pb+Pb Collisions at $\sqrt{s_{NN}}=$ 5.02 TeV
• The domain of soft hadrons in transverse momentum space in high energy collisions