Magnetic field effect on hadron yield ratios and fluctuations in a hadron resonance gas

Abstract

This work studies the influence of an external magnetic field on hadron yields and fluctuations in a hadron resonance gas by performing calculations within an updated version of the open-source Thermal-FIST package. The presence of the magnetic field has a sizable influence on certain hadron yield ratios. Most notably, it leads to enhanced $p/\pi$ and suppressed $n/p$ ratios, which may serve as a magnetometer in heavy-ion collisions. By attributing the centrality dependence of the $p/\pi$ ratio in Pb-Pb collisions at 5.02~TeV measured by the ALICE Collaboration entirely to the magnetic field, its maximal strength at freeze-out is estimated to be $eB\simeq 0.12$~GeV${}^2\simeq 6.3m_{\pi }^2$ in peripheral collisions. The magnetic field also enhances various conserved charge susceptibilities, which is qualitatively consistent with recent lattice QCD data and is driven in the HRG model by the increase of hadron densities. However, the variances of hadrons do not show any enhancement when normalized by the means, therefore, measurements of second-order fluctuations in heavy-ion collisions appear to offer limited additional information about the magnetic field relative to mean multiplicities.

arXiv comment11 pages, 7 figures, v3: published version, minor misprints corrected, v2: Fig. 7 added with the comparison between proton-charge correlator and proton/pion ratio

References in corpus (64)

• The Chiral Magnetic Effect
• The effects of topological charge change in heavy ion collisions: "Event by event P and CP violation"
• Estimate of the magnetic field strength in heavy-ion collisions
• Physics of Strongly Magnetized Neutron Stars
• Event-by-event generation of electromagnetic fields in heavy-ion collisions
• Decoding the phase structure of QCD via particle production at high energy
• The QCD phase diagram for external magnetic fields
• Centrality dependence of $\pi$, K, p production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Quantum field theory in a magnetic field: From quantum chromodynamics to graphene and Dirac semimetals
• QCD quark condensate in external magnetic fields
• Event-by-event fluctuations of magnetic and electric fields in heavy ion collisions
• Energy and system size dependence of chemical freeze-out in relativistic nuclear collisions
• Electromagnetic fields and anomalous transports in heavy-ion collisions --- A pedagogical review
• Hadron Resonance Mass Spectrum and Lattice QCD Thermodynamics
• Baryon-strangeness correlations: a diagnostic of strongly interacting matter
• Thermal Hadron Production in High Energy Heavy Ion Collisions
• Production of charged pions, kaons and (anti-)protons in Pb-Pb and inelastic pp collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV
• Higher order fluctuations and correlations of conserved charges from lattice QCD
• Magnetic field-induced gluonic (inverse) catalysis and pressure (an)isotropy in QCD
• van der Waals Interactions in Hadron Resonance Gas: From Nuclear Matter to Lattice QCD
• Hadron Formation in Relativistic Nuclear Collisions and the QCD Phase Diagram
• Thermal-FIST: A package for heavy-ion collisions and hadronic equation of state
• The ALICE experiment: a journey through QCD
• Relation between baryon number fluctuations and experimentally observed proton number fluctuations in relativistic heavy ion collisions
• Momentum transport in strongly coupled anisotropic plasmas in the presence of strong magnetic fields
• Global polarization of $\Lambda$ and $\overline{\Lambda }$ hyperons in Pb-Pb collisions at the LHC
• Meson masses in electromagnetic fields with Wilson fermions
• Thermo-magnetic effects in quark matter: Nambu--Jona-Lasinio model constrained by lattice QCD
• Constraining the hadronic spectrum through QCD thermodynamics on the lattice
• Loosely-bound objects produced in nuclear collisions at the LHC
• QCD equation of state at nonzero magnetic fields in the Hadron Resonance Gas model
• ${\pi }_0$ pole mass calculation in a strong magnetic field and lattice constraints
• Repulsive baryonic interactions and lattice QCD observables at imaginary chemical potential
• Non-thermal p/pi ratio at LHC as a consequence of hadronic final state interactions
• Centrality dependence of hadronization and chemical freeze-out conditions in heavy ion collisions at \sqrt s_{NN} = 2.76 TeV
• Off-diagonal correlators of conserved charges from lattice QCD and how to relate them to experiment
• Chiral properties of (2+1)-flavor QCD in strong magnetic fields at zero temperature
• Heavy quark complex potential in a strongly magnetized hot QGP medium
• Second order cumulants of conserved charge fluctuations revisited I. Vanishing chemical potentials
• Effect of the anomalous magnetic moment of quarks on magnetized QCD matter and meson spectra
• Global baryon number conservation encoded in net-proton fluctuations measured in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76 TeV
• Magnetized baryons and the QCD phase diagram: NJL model meets the lattice
• Phase diagram of QCD in a magnetic background
• Neutral and charged pion properties under strong magnetic fields in the NJL model
• Finite resonance widths influence the thermal-model description of hadron yields
• Influence of hadronic resonances on the chemical freeze-out in heavy-ion collisions
• Particlization of an interacting hadron resonance gas with global conservation laws for event-by-event fluctuations in heavy-ion collisions
• Kinetic freeze-out temperature from yields of short-lived resonances
• Exploring effects of magnetic field on the Hadron Resonance Gas
• Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field
• Spectral properties of $\rho$ meson in a magnetic field
• Chiral condensates and screening masses of neutral pseudoscalar mesons in thermomagnetic QCD medium
• Magnetic shift of the chemical freezeout and electric charge fluctuations
• The Role of Baryon Number Conservation in Measurements of Fluctuations
• Light (anti)nuclei production in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV
• Baryon electric charge correlation as a magnetometer of QCD
• Magnetic corrections to the boson self-coupling and boson-fermion coupling in the linear sigma model with quarks
• Rho meson decay in presence of magnetic field
• Effect of a magnetic field on the thermodynamic properties of a high-temperature hadron resonance gas with van der Waals interactions
• Closing in on critical net-baryon fluctuations at LHC energies: cumulants up to third order in Pb$-$Pb collisions
• Centrality dependence of proton and light nuclei yields as a consequence of baryon annihilation in the hadronic phase
• Masses of magnetized pseudoscalar and vector mesons in an extended NJL model: the role of axial vector mesons
• Neutral to charged kaon yield fluctuations in Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}}$ = 2.76TeV
• Scalar boson emission from a magnetized relativistic plasma

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