Beam energy dependence of net-hyperon yield and its implication on baryon transport mechanism
arXiv:2409.06492 · doi:10.1016/j.physletb.2024.139205
Abstract
In the constituent quark model, each quark inside a baryon carries 1/3 unit of the baryon number. An alternative picture exists where the center of a Y-shaped topology of gluon fields, called the baryon junction, carries a unit baryon number. Studying baryon transport over a large rapidity gap () in nuclear collisions provides a possible tool to distinguish these two pictures. A recent analysis of global data on net-proton yield at mid-rapidity in Au+Au collisions showed an exponential dependence on and the exponential slope does not vary with event centrality, favoring the baryon junction picture. Since junctions are flavor blind, hyperons -- baryons containing valence strange quarks -- are expected to exhibit a similar behavior as the proton. This study aims to test this prediction by analyzing hyperon yields in Au+Au collisions at various energies. We observe that net-hyperon yields, after correcting for the strangeness production suppression, adhere to the expected exponential form. The extracted slope parameters for net-, net- and net- are consistent with each other and with those of net-proton within uncertainties, and exhibit no centrality dependence, further substantiating the baryon junction picture. Various implementations of the \texttt{PYTHIA} event generator, primarily based on valence quarks for baryon transport, are unable to simultaneously describe the slope parameters for all baryons.
References in corpus (31)
- PYTHIA 6.4 Physics and Manual
- PYTHIA 6.2 Physics and Manual
- A Brief Introduction to PYTHIA 8.1
- Glauber Modeling in High Energy Nuclear Collisions
- Systematic Measurements of Identified Particle Spectra in pp, d+Au and Au+Au Collisions from STAR
- Tuning Monte Carlo Generators: The Perugia Tunes
- Bulk Properties of the Medium Produced in Relativistic Heavy-Ion Collisions from the Beam Energy Scan Program
- Energy Dependence of Pion and Kaon Production in Central Pb+Pb Collisions
- Measurements of Strange Particle Production in Collisions at = 200 GeV
- String Formation Beyond Leading Colour
- K and production in Pb-Pb collisions at = 2.76 TeV
- Production of pions, kaons and protons in pp collisions at GeV with ALICE at the LHC
- Multi-strange baryon production at mid-rapidity in Pb-Pb collisions at = 2.76 TeV
- Charged Meson Rapidity Distributions in central Au+Au Collisions at sqrt(s_nn) = 200 GeV
- Identified charged hadron production in p+p collisions at sqrt(s)=200 and 62.4 GeV
- Can Gluons Trace Baryon Number?
- Three-Quark Potential in SU(3) Lattice QCD
- Strange particle production in proton-proton collisions at TeV with ALICE at the LHC
- Energy dependence of Lambda and Xi production in central Pb+Pb collisions at 20A, 30A, 40A, 80A, and 158A GeV measured at the CERN Super Proton Synchrotron
- Strangeness Enhancement in Cu+Cu and Au+Au Collisions at \sqrt{s_{NN}} = 200 GeV
- Inclusive production of charged pions in p+p collisions at 158 GeV/c beam momentum
- Strange hadron production in Au+Au collisions at = 7.7, 11.5, 19.6, 27, and 39 GeV
- Strange and Multi-strange Particle Production in Au+Au Collisions at = 62.4 GeV
- Enhancement of hyperon production at central rapidity in 158 A GeV/c Pb-Pb collisions
- Inclusive production of charged kaons in p+p collisions at 158 GeV/c beam momentum and a new evaluation of the energy dependence of kaon production up to collider energies
- Search for baryon junctions in photonuclear processes and isobar collisions at RHIC
- Results on Total and Elastic Cross Sections in Proton-Proton Collisions at GeV
- Correlations of Baryon and Charge Stopping in Heavy Ion Collisions
- Lattice QCD Study for the Interquark Force in Three-Quark and Multi-Quark Systems
- Search for baryon junctions in e+A collisions at the Electron Ion Collider
- A Comprehensive Study of Energy Dependence of Particle Ratios in Collisions from SPS to LHC Energies