Constituent quark number scaling from strange hadron spectra in $pp$ collisions at $\sqrt{s}=$ 13 TeV

Abstract

We show that the data of $p_T$ spectra of ${\Omega }^{-}$ and $\varphi$ at midrapidity in inelastic events in $pp$ collisions at $\sqrt{s}=$ 13 TeV exhibit a constituent quark number scaling property, which is a clear signal of quark combination mechanism at hadronization. We use a quark combination model under equal velocity combination approximation to systematically study the production of identified hadrons in $pp$ collisions at $\sqrt{s}$= 13 TeV. The midrapidity data of $p_T$ spectra of proton, $\Lambda$, ${\Xi }^{-}$, ${\Omega }^{-}$, $\varphi$ and $K^{\ast }$ in inelastic events are simultaneously well fitted by the model. The data of multiplicity dependency of yields of these hadrons are also well understood. The strong $p_T$ dependence for data of $p/\varphi$ ratio is well explained by the model, which further suggests that the production of two hadrons with similar masses is determined by their quark contents at hadronization. $p_T$ spectra of strange hadrons at midrapidity in different multiplicity classes in $pp$ collisions at $\sqrt{s}=$ 13 TeV are predicted to further test the model in the future. The midrapidity $p_T$ spectra of soft ($p_T<2$ GeV/c) strange quark and up/down quark at hadronization in $pp$ collisions at $\sqrt{s}=$ 13 TeV are extracted.

arXiv comment13 pages, 14 figures

References in corpus (46)

• A Brief Introduction to PYTHIA 8.1
• Observation of Long-Range Near-Side Angular Correlations in Proton-Proton Collisions at the LHC
• Hadronization in heavy ion collisions: Recombination and fragmentation of partons
• Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
• Parton coalescence and antiproton/pion anomaly at RHIC
• Elliptic flow at large transverse momenta from quark coalescence
• Multiplicity Dependence of Pion, Kaon, Proton and Lambda Production in p-Pb Collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Evidence for collectivity in pp collisions at the LHC
• String Formation Beyond Leading Colour
• Scaling properties of azimuthal anisotropy in Au+Au and Cu+Cu collisions at sqrt(s_NN) = 200 GeV
• Scaling behavior at high p_T and the p/pi ratio
• Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Initial state geometry and the role of hydrodynamics in proton-proton, proton-nucleus and deuteron-nucleus collisions
• K*(892)${}^0$ and $\Phi$(1020) production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Color reconnection and flow-like patterns in pp collisions
• Collective dynamics of the high-energy proton-nucleus collisions
• Scaling properties of proton and anti-proton production in sqrt(s_NN) = 200 GeV Au + Au collisions
• Measurement of long-range near-side two-particle angular correlations in pp collisions at sqrt(s) = 13 TeV
• The "Ridge" in Proton-Proton Scattering at 7 TeV
• The Monte Carlo Event Generator AcerMC 2.0 with Interfaces to PYTHIA 6.2 and HERWIG 6.5
• Multiplicity dependence of light-flavor hadron production in pp collisions at $\sqrt{s}$ = 7 TeV
• Production of K${}^{\ast }$(892)${}^0$ and $\varphi$(1020) in pp collisions at $\sqrt{s}=7$ TeV
• Long-range two-particle correlations of strange hadrons with charged particles in pPb and PbPb collisions at LHC energies
• Production of K${}^{\ast }$(892)${}^0$ and $\varphi$(1020) in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Multi-strange baryon production in pp collisions at $\sqrt{s}$ = 7 TeV with ALICE
• New feature of low $p_T$ charm quark hadronization in $pp$ collisions at $\sqrt{s}=7$ TeV
• Eccentricity and elliptic flow in proton-proton collisions from parton evolution
• Elliptic flow ($v_2$) in pp collisions at energies available at the CERN Large Hadron Collider: A hydrodynamical approach
• Production of $\Sigma (1385{)}^{\pm }$ and $\Xi (1530{)}^0$ in p-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Production rates for hadrons, pentaquarks ${\Theta }^{+}$ and ${\Theta }^{\ast ++}$, and di-baryon $(\Omega \Omega {)}_{0^{+}}$ in relativistic heavy ion collisions by a quark combination model
• Hadron production by quark combination in central Pb+Pb collisions at $\sqrt{s_{NN}}=17.3$ GeV
• Parton Distributions at Hadronization from Bulk Dense Matter Produced at RHIC
• Production of single-charm hadrons by quark combination mechanism in $p$-Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV
• Hadron Yield Correlation in Combination Models in High Energy AA Collisions
• Energy dependence of $\varphi$(1020) production at mid-rapidity in pp collisions with ALICE at the LHC
• Direct photons at low transverse momentum -- a QGP signal in pp collisions at LHC
• 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
• Baryon-antibaryon production asymmetry in relativistic heavy ion collisions
• Strangeness production as a function of charged particle multiplicity in proton-proton collisions
• New insights into hadron production mechanism from $p_T$ spectra in $pp$ collisions at $\sqrt{s}=7$ TeV
• Multiplicity dependence of strangeness and hadronic resonance production in pp and p-Pb collisions with ALICE at the LHC
• Yield ratios of identified hadrons in p+p, p+Pb, Pb+Pb collisions at the Large Hadron Collider
• Yield correlations and $p_T$ dependence of charm hadrons in Pb + Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV
• Multiplicity dependence of identified particle production in pp collisions with ALICE
• D+- and D0 (anti D0) production asymetries in pion-proton collisions

Cited by in corpus (9)

• Production of light flavor and single-charmed hadrons in $pp$ collisions at $\sqrt{s}=5.02$ TeV in an equal-velocity quark combination model
• Quark number scaling of $p_T$ spectra for $\Omega$ and $\varphi$ in relativistic heavy-ion collisions
• Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions
• Strange hadron production in a quark combination model in Au+Au collisions at RHIC energies
• Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions
• Impact of strong magnetic field, baryon chemical potential, and medium anisotropy on polarization and spin alignment of hadrons
• Signals of quark combination at hadronization in $pp$ collisions at $\sqrt{s}=200$ GeV
• Statistical method in quark combination model
• Transverse momentum and multiplicity dependence of ${\Lambda }_c^{+}/D^0$ ratio in $pp$ collisions at $\sqrt{s}=13$ TeV