Determination of the effective strong coupling constant alpha_{s,g_1}(Q^2) from CLAS spin structure function data

Abstract

We present a new extraction of the effective strong coupling constant α_{s,g_1}(Q^2). The result agrees with a previous determination and extends the measurement of the low and high Q^2 behavior of α_{s,g_1}(Q^2) that was previously deduced from sum rules. In particular, it experimentally verifies the lack of Q^2-dependence of α_{s,g_1}(Q^2) in the low Q^2 limit. This fact is necessary for application of the AdS/CFT correspondence to QCD calculations. We provide a parameterization of α_{s,g_1}(Q^2) thatcan equivalently be used to parameterize the Q^2-dependence of the generalized Gerasimov-Drell-Hearn and Bjorken sums.

Updated to the version published in PLB (minor modifications)

References in corpus (26)

• The Large N Limit of Superconformal Field Theories and Supergravity
• Linear Confinement and AdS/QCD
• Hard Scattering and Gauge/String Duality
• Infrared Properties of QCD from Dyson-Schwinger equations
• Hadronic Spectra and Light-Front Wavefunctions in Holographic QCD
• Bethe-Salpeter Study of Vector Meson Masses and Decay Constants
• Deep Inelastic Scattering and Gauge/String Duality
• Hadronic Spectrum of a Holographic Dual of QCD
• Precision Determination of the Neutron Spin Structure Function g1n
• On the Infrared Exponent for Gluon and Ghost Propagation in Landau Gauge QCD
• Measurements of the $Q^2$-Dependence of the Proton and Neutron Spin Structure Functions g1p and g1n
• QCD Analysis of Polarized Deep Inelastic Data and Parton Distributions
• Analysis of a quenched lattice-QCD dressed-quark propagator
• Commensurate Scale Relations in Quantum Chromodynamics
• Infrared Exponents and Running Coupling of SU(N) Yang-Mills Theories
• Experimental determination of the effective strong coupling constant
• Experimental determination of the evolution of the Bjorken integral at low Q^2
• The Generalized Crewther Relation in QCD and its Experimental Consequences
• A measurement of $alph{a}_s(Q^2)$ from the Gross-Llewellyn Smith Sum Rule
• Q^2 Evolution of the Neutron Spin Structure Moments using a He-3 Target
• On the Behavior of the Effective QCD Coupling alpha_tau(s) at Low Scales
• Generalized Sum Rules for Spin-Dependent Structure Functions of the Nucleon
• Multiplicative renormalizability and quark propagator
• What the Gribov copy tells on the confinment and the theory of dynamical chiral symmetry breaking
• The Gerasimov-Drell-Hearn Sum Rule and the Spin Structure of the Nucleon
• The Infrared Behaviour of the Running Coupling in Landau Gauge QCD

Cited by in corpus (72)

• Event generation with SHERPA 1.1
• General-purpose event generators for LHC physics
• Light-Front Holography: A First Approximation to QCD
• The QCD Running Coupling
• The Large Hadron-Electron Collider at the HL-LHC
• 50 Years of Quantum Chromodynamics
• Nonperturbative QCD Coupling and its $\beta$ function from Light-Front Holography
• Insights into the Emergence of Mass from Studies of Pion and Kaon Structure
• Spin Structure of the Nucleon - Status and Recent Results
• Process-independent strong running coupling
• Azimuthal correlations of heavy quarks in Pb+Pb collisions at LHC ($\sqrt{s}=2.76$ TeV)
• The Spin Structure of the Nucleon
• Effective charge from lattice QCD
• Empirical Consequences of Emergent Mass
• Collisional processes of on-shell and off-shell heavy quarks in vacuum and in the Quark-Gluon-Plasma
• Selected Science Opportunities for the EicC
• Light-Front Holography and Gauge/Gravity Duality: The Light Meson and Baryon Spectra
• Bjorken Sum Rule and pQCD frontier on the move
• Connecting the Hadron Mass Scale to the Fundamental Mass Scale of Quantum Chromodynamics
• QCD Running Couplings and Effective Charges
• Nucleon spin structure and pQCD frontier on the move
• Four-loop QCD analysis of the Bjorken sum rule vs data
• Reflections upon the Emergence of Hadronic Mass
• Process-independent effective coupling. From QCD Green's functions to phenomenology
• On the Interface between Perturbative and Nonperturbative QCD
• Nearly perturbative lattice-motivated QCD coupling with zero IR limit
• anQCD: a Mathematica package for calculations in general analytic QCD models
• Measurement of the Bjorken Sum at very low $Q^2$
• Implications of the Principle of Maximum Conformality for the QCD Strong Coupling
• Extraction of ${\alpha }_s$ from deep inelastic scattering at large $x$
• Baryon properties from light-front holographic QCD
• Determination of ${\Lambda }_{\overline{MS}}$ at five loops from holographic QCD
• Gluon Propagator in Fractional Analytic Perturbation Theory
• Bjorken sum rule in QCD frameworks with analytic (holomorphic) coupling
• Techniques of evaluation of QCD low-energy physical quantities with running coupling with infrared fixed point
• The Light-Front Schrödinger Equation and Determination of the Perturbative QCD Scale from Color Confinement
• N* Structure and Strong QCD
• Pion condensation in holographic QCD
• Implications of Graviton-Graviton Interaction to Dark Matter
• Structure of magnetized strange quark star in perturbative QCD
• Self-interacting scalar fields at high-temperature
• Towards a Born term for hadrons
• Is the remnant of GW190425 a strange quark star?
• Heavy quarkonia properties from a hard-wall confinement potential model with conformal symmetry perturbing effects
• Light-Front Holography and Superconformal Quantum Mechanics: A New Approach to Hadron Structure and Color Confinement
• Perturbative QCD in acceptable schemes with holomorphic coupling
• Light-Front Holography, Color Confinement, and Supersymmetric Features of QCD
• Modelling duality between bound and resonant meson spectra by means of free quantum motions on the de Sitter space time dS4
• Analysis of the semileptonic $B\to K_1{\ell }^{+}{\ell }^{-}$transitions and non-leptonic $B\to K_1\gamma$ decay in the AdS/QCD correspondence
• Pileup and Infrared Radiation Annihilation (PIRANHA): A Paradigm for Continuous Jet Grooming
• Analysis of strong coupling constant with machine learning and its application
• Proton's Electromagnetic Form Factors from a Non-Power Confinement Potential
• Highlights and Perspectives of the JLab Spin Physics Program
• PQCD Analysis of Parton-Hadron Duality
• Evaluations of low-energy physical quantities in QCD with IR freezing of the coupling
• Hadron Form Factors in AdS/QCD
• The magnetic mass of transverse gluon, the B-meson weak decay vertex and the triality symmetry of octonion
• Light-front holographic QCD with generic dilaton profile
• Analysis of ${\alpha }_s$ from the realization of quark-hadron duality
• The QCD running coupling at all scales and the connection between hadron masses and Λ_s
• Search for scaling onset in exclusive reactions with the lightest nuclei
• Insights into the Origin of Mass
• Confinement with Perturbation Theory, after All?
• Light-Front Holography and AdS/QCD Correspondence
• Magnetic aspects of QCD at finite density and temperature
• Measurement of the nucleon spin structure functions for 0.01<$Q^2$<1 GeV${}^2$ using CLAS
• AdS/QCD, Light-Front Holography, and the Nonperturbative Running Coupling
• Hadron and Nuclear Physics on the Light Front
• Potentials on the conformally compactified Minkowski spacetime and their application to quark deconfinement
• Lectures on Bound states
• Systematic investigation of trace anomaly contribution in nucleon mass
• Study of spin sum rules (and the strong coupling constant at large distances)