Fluctuations and correlations of net baryon number, electric charge and strangeness in a background magnetic field

Abstract

We present results on the second-order fluctuations of and correlations among net baryon number, electric charge and strangeness in (2+1)-flavor lattice QCD in the presence of a background magnetic field. Simulations are performed using the tree-level improved gauge action and the highly improved staggered quark (HISQ) action with a fixed scale approach ($a\simeq$ 0.117 fm). The light quark mass is set to be 1/10 of the physical strange quark mass and the corresponding pion mass is about 220 MeV at vanishing magnetic field. Simulations are performed on $32^3\times N_{\tau }$ lattices with 9 values of $N_{\tau }$ varying from 96 to 6 corresponding to temperatures ranging from zero up to 281 MeV. The magnetic field strength $eB$ is simulated with 15 different values up to $\sim$2.5 GeV${}^2$ at each nonzero temperature. We find that quadratic fluctuations and correlations do not show any singular behavior at zero temperature in the current window of $eB$ while they develop peaked structures at nonzero temperatures as $eB$ grows. By comparing the electric charge-related fluctuations and correlations with hadron resonance gas model calculations and ideal gas limits we find that the changes in degrees of freedom start at lower temperatures in stronger magnetic fields. Significant effects induced by magnetic fields on the isospin symmetry and ratios of net baryon number and baryon-strangeness correlation to strangeness fluctuation are observed, which could be useful for probing the existence of a magnetic field in heavy-ion collision experiments.

arXiv comment12 pages, 7 figures, invited contribution to The European Physical Journal A-Hadrons and Nuclei: Topical Issue on "QCD Phase Diagram in Strong Magnetic Fields", minor revision

References in corpus (72)

• 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
• The chiral and deconfinement aspects of the QCD transition
• Signatures of the Tricritical Point in QCD
• Event-by-Event Fluctuations in Heavy Ion Collisions and the QCD Critical Point
• Event-by-event generation of electromagnetic fields in heavy-ion collisions
• Chiral Magnetic and Vortical Effects in High-Energy Nuclear Collisions --- A Status Report
• The QCD phase diagram for external magnetic fields
• Highly Improved Staggered Quarks on the Lattice, with Applications to Charm Physics
• QCD quark condensate in external magnetic fields
• Search for the QCD Critical Point with Fluctuations of Conserved Quantities in Relativistic Heavy-Ion Collisions at RHIC : An Overview
• The QCD Equation of State to $\mathcal{O}({\mu }_B^6)$ from Lattice QCD
• Fluctuation Probes of Quark Deconfinement
• The QCD crossover at finite chemical potential from lattice simulations
• Charged Particle Ratio Fluctuation as a Signal for QGP
• Fluctuations and Correlations of net baryon number, electric charge, and strangeness: A comparison of lattice QCD results with the hadron resonance gas model
• Basics of thermal field theory -- a tutorial on perturbative computations
• Inverse magnetic catalysis and the Polyakov loop
• Thermal dilepton rate and electrical conductivity: An analysis of vector current correlation functions in quenched lattice QCD
• Spectral functions at small energies and the electrical conductivity in hot, quenched lattice QCD
• Baryon-strangeness correlations: a diagnostic of strongly interacting matter
• The QCD equation of state in background magnetic fields
• Fluctuations as probe of the QCD phase transition and freeze-out in heavy ion collisions at LHC and RHIC
• Chiral phase transition temperature in (2+1)-Flavor QCD
• Non-monotonic energy dependence of net-proton number fluctuations
• Magnetic Catalysis vs Magnetic Inhibition
• Inverse magnetic catalysis in the (2+1)-flavor Nambu--Jona-Lasinio and Polyakov--Nambu--Jona-Lasinio models
• Spontaneous electromagnetic superconductivity of vacuum in strong magnetic field: evidence from the Nambu--Jona-Lasinio model
• Chiral Properties of Strong Interactions in a Magnetic Background
• Skewness, kurtosis and the 5th and 6th order cumulants of net baryon-number distributions from lattice QCD confront high-statistics STAR data
• On Primordial Magnetic Fields of Electroweak Origin
• Lattice QCD at non-zero temperature
• Meson masses in electromagnetic fields with Wilson fermions
• Strangeness at high temperatures: from hadrons to quarks
• Discrete Accidental Symmetry for a Particle in a Constant Magnetic Field on a Torus
• QCD equation of state at nonzero magnetic fields in the Hadron Resonance Gas model
• Meson Screening Masses in (2+1)-Flavor QCD
• The quark mass gap in a magnetic field
• Diagonal and off-diagonal quark number susceptibilities at high temperatures
• Magnetic Catalysis: A Review
• Deconfinement transition in two-flavour lattice QCD with dynamical overlap fermions in an external magnetic field
• Chiral magnetic effect reveals the topology of gauge fields in heavy-ion collisions
• The melting and abundance of open charm hadrons
• Low-$p_T$ $e^{+}{e}^{-}$ pair production in Au$+$Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and U$+$U collisions at $\sqrt{s_{NN}}$ = 193 GeV at STAR
• Spontaneous generation of local CP violation and inverse magnetic catalysis
• Probing the effects of strong electromagnetic fields with charge-dependent directed flow in Pb-Pb collisions at the LHC
• QCD phase diagram in a magnetic background for different values of the pion mass
• First observation of the directed flow of $D^0$ and $\overline{D^0}$ in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200~GeV
• The Magnetic Structure of Light Nuclei from Lattice QCD
• Hyper-order baryon number fluctuations at finite temperature and density
• Thermal dilepton rates and electrical conductivity of the QGP from the lattice
• Magnetic catalysis (and inverse catalysis) at finite temperature in two-color lattice QCD
• Heavy quarkonia in strong magnetic fields
• Observation of centrality-dependent acoplanarity for muon pairs produced via two-photon scattering in Pb+Pb collisions at $\sqrt{s_{\mathrm{NN}}}=5.02$ TeV with the ATLAS detector
• Magnetic catalysis and inverse catalysis for heavy pions
• Chiral properties of (2+1)-flavor QCD in strong magnetic fields at zero temperature
• Lattice study of electromagnetic conductivity of quark-gluon plasma in external magnetic field
• Magnetized baryons and the QCD phase diagram: NJL model meets the lattice
• Inverse Magnetic Catalysis from improved Holographic QCD in the Veneziano limit
• Recent progresses on QCD phases in a strong magnetic field -- views from Nambu--Jona-Lasinio model
• Exploring effects of magnetic field on the Hadron Resonance Gas
• Magnetic shift of the chemical freezeout and electric charge fluctuations
• From Inverse to Delayed Magnetic Catalysis in Strong Magnetic Field
• New developments in lattice QCD on equilibrium physics and phase diagram
• Octet Baryon Magnetic Moments from Lattice QCD: Approaching Experiment from a Three-Flavor Symmetric Point
• Thermodynamics of 2+1 Flavor Polyakov-Loop Quark-Meson Model under External Magnetic Field
• Chiral phase structure of three flavor QCD in a background magnetic field
• Fluctuations and correlations of hot QCD matter in an external magnetic field
• Interacting hadron resonance gas model in magnetic field and the fluctuations of conserved charges
• Bose-Einstein Condensation of Bound Pairs of Relativistic Fermions in a Magnetic Field
• Net baryon-number fluctuations in magnetized quark matter
• Overview of fluctuation and correlation measurements

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• Baryon electric charge correlation as a magnetometer of QCD
• Heavy quark dynamics in a strongly magnetized quark-gluon plasma
• Effects of finite volume and magnetic fields on thermodynamic properties of quark matter and fluctuations of conserved charges
• QCD Equation of State at nonzero baryon density in external magnetic field
• Magnetic field effect on hadron yield ratios and fluctuations in a hadron resonance gas
• Deciphering the phases of QCD matter with fluctuations and correlations of conserved charges
• Chiral condensates and screening masses of neutral pseudoscalar mesons from lattice QCD at physical quark masses
• Correlations and fluctuations in a magnetized PNJL model with and without inverse magnetic catalysis effect
• Purity correction for cumulants of hyperon number distribution
• Strongly interacting matter in extreme magnetic fields
• Study of the Roberge-Weiss phase caused by external uniform classical electric field using lattice QCD approach
• Correlations and fluctuations in a magnetized three-flavor PNJL model with and without inverse magnetic catalysis effect
• Thermodynamics of strongly magnetized dense quark matter from hard dense loop perturbation theory
• Measurement of correlations among net-charge, net-proton, and net-kaon multiplicity distributions in Pb$-$Pb collisions at $\sqrt{s_{\text{NN}}}=5.02$ TeV