The influence of net-quarks on the yields and rapidity spectra of identified hadrons

Abstract

Within a quark combination model, we study systematically the yields and rapidity spectra of various hadrons in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV. We find that considering the difference in rapidity between net-quarks and newborn quarks, the data of multiplicities, rapidity distributions for ${\pi }^{\pm }$, $K^{\pm }$, $p(\bar{p})$ and, in particular the ratios of charged antihadron to hadron as a function of rapidity, can be well described. The effect of net-quarks on various hadrons is analysed, and the rapidity distributions for $K_s^0$, $\Lambda (\bar{\Lambda })$, ${\Sigma }^{+}({\bar{\Sigma }}^{{}_{-}})$, ${\mathrm{\Xi }}^{-}$ (${\bar{\mathrm{\Xi }}}^{{}_{+}}$) and ${\mathrm{\Omega }}^{-}({\bar{\mathrm{\Omega }}}^{{}_{+}})$ are predicted. We discuss the rapidity distribution of net-baryon, and find that it reflects exactly the energy loss of colliding nuclei.

arXiv comment8 pages, 7 figures

References in corpus (28)

• Experimental and Theoretical Challenges in the Search for the Quark Gluon Plasma: The STAR Collaboration's Critical Assessment of the Evidence from RHIC Collisions
• High-Energy-Physics Event Generation with PYTHIA 6.1
• New Forms of QCD Matter Discovered at RHIC
• Identified Charged Particle Spectra and Yields in Au+Au Collisions at sqrt(s_NN) = 200 GeV
• Hadronization in heavy ion collisions: Recombination and fragmentation of partons
• 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
• The Quark-Gluon Plasma in Equilibrium
• Scaling behavior at high p_T and the p/pi ratio
• Nuclear Stopping in Au+Au Collisions at sqrt(sNN) = 200 GeV
• Charged Meson Rapidity Distributions in central Au+Au Collisions at sqrt(s_nn) = 200 GeV
• Matter in extremis: ultrarelativistic nuclear collisions at RHIC
• Anisotropic flow
• Colour Deconfinement in Nuclear Collisions
• Particle Production in Heavy Ion Collisions
• Enhanced strange baryon production in Au+Au collisions compared to p+p at sqrts = 200 GeV
• Rapidity Dependence of Charged Antiparticle-to-Particle Ratios in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV
• Flavor ordering of elliptic flows at high transverse momentum
• The beta function and equation of state for QCD with two flavors of quarks
• Forward Production in d+Au Collisions by Parton Recombination
• Statistical Mechanics of semi-classical colored Objects
• 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
• Longitudinal fluid dynamics for ultrarelativistic heavy-ion collisions
• Charged-particle rapidity density in Au+Au collisions in a quark combination model
• Study of Baryon Antibaryon Rapidity Correlation in e^+e^- Annihilation by Quark Combination Model
• Color separate singlets in $e^{+}{e}^{-}$ annihilation
• Properties of color singlet chain states in $e^{+}{e}^{-}$ annihilation

Cited by in corpus (7)

• Hadron production by quark combination in central Pb+Pb collisions at $\sqrt{s_{NN}}=17.3$ GeV
• Quark charge balance function and hadronization effects in relativistic heavy ion collisions
• Hadronic Rapidity Spectra in Heavy Ion Collisions at SPS and AGS energies in a Quark Combination Model
• $K^{\ast 0}$ and ${\Sigma }^{\ast }$ production in Au+Au collisions at $\sqrt{s_{NN}}=$ 200 GeV and 62.4 GeV
• Hadronization effects on the baryon-strangeness correlation in quark combination models
• Centrality dependence of $p_T$ spectra for identified hadrons in Au+Au and Cu+Cu collisions at $\sqrt{s_{NN}}=200$ GeV
• Statistical method in quark combination model