Publications (42)
Fully Relativistic Derivation of the Thermal Sunyaev-Zel'dovich Effect
BalÅ¡a TerziÄ, Geoffrey A. Krafft, William Clark +3
We present the first fully and inherently relativistic derivation of the thermal Sunyaev-Zel'dovich effect. This work uses the formalism historically used to compute radiation spec…
Unified Description of Polarized and Unpolarized Quark Distributions in the Proton
Tianbo Liu, Raza Sabbir Sufian, Guy F. de Téramond +3
We propose a unified new approach to describe polarized and unpolarized quark distributions in the proton based on the gauge-gravity correspondence, light-front holography, and the…
New Analysis of Dark Matter in Elliptical Galaxies
David Winters, Alexandre Deur, Xiaochao Zheng
We investigate a correlation between the dark matter content of elliptical galaxies and their ellipticity that was initially reported in 2014. We use new determinations of dark mat…
Towards a single scale-dependent Pomeron in holographic light-front QCD
Hans Günter Dosch, Guy F. de Téramond, Tianbo Liu +3
The Pomeron Regge trajectory underlies the dynamics dependence of hadronic total cross sections and diffractive reactions at high energies. The physics of the Pomeron is closely re…
Implications of the Principle of Maximum Conformality for the QCD Strong Coupling
Alexandre Deur, Jian-Ming Shen, Xing-Gang Wu +2
The Principle of Maximum Conformality (PMC) provides scale-fixed perturbative QCD predictions which are independent of the choice of the renormalization scheme, as well as the choi…
Single-pion contribution to the Gerasimov--Drell--Hearn sum rule and related integrals
Igor Strakovsky, Simon Å irca, William J. Briscoe +3
Phenomenological amplitudes obtained in partial-wave analyses (PWA) of single-pion photoproduction are used to evaluate the contribution of this process to the Gerasimov-Drell-Hear…
New Spin Structure Constraints on Hyperfine Splitting and Proton Size
David Ruth, Karl Slifer, Jian-Ping Chen +9
The 1S hyperfine splitting in hydrogen is measured to an impressive ppt precision and will soon be measured to ppm precision in muonic hydrogen. The latter measurement will rely on…
Nucleon spin structure measurements at Jefferson Lab
Alexandre Deur
We summarize the measurements investigating the nucleon spin structure done at Jefferson Lab, a multi-GeV continuous electron beam facility located in Newport News, Virgina, USA. A…
Asymptotic gauge symmetry and UV extension of the nonperturbative coupling in holographic QCD
Guy F. de Teramond, Arpon Paul, Hans Gunter Dosch +4
We extend our recent analytic study of the strong coupling in the nonperturbative and near-perturbative regimes~\cite{deTeramond:2024ikl} by imposing rigorous renorm…
Hadron and Nuclear Physics on the Light Front
Stanley J. Brodsky, Alexandre Deur
The QCD light-front (LF) Hamiltonian equation H_{LF}|Ψ> = M^2 |Ψ> derived from quantization at fixed LF time Ï= t+z/c provides a causal, frame-independent, method for computing…
The Light-Front Schrödinger Equation and Determination of the Perturbative QCD Scale from Color Confinement
Stanley J. Brodsky, Guy F. de Téramond, Alexandre Deur +1
The valence Fock-state wavefunctions of the light-front QCD Hamiltonian satisfy a relativistic equation of motion with an effective confining potential which systematically inc…
Measurement of the generalized form factors near threshold via $γ^* p \to nÏ^+$ at high
Kijun Park, Ralf Gothe, Krishna Adhikari +144
We report the first extraction of the pion-nucleon multipoles near the production threshold for the channel at relatively high momentum transfer ( up to 4.2 $\rm{GeV^2…
Poincaré invariance and the Unruh effect
Alexandre Deur, Stanley J. Brodsky, Craig D. Roberts +1
In quantum field theory, the vacuum is popularly considered to be a complex medium populated with virtual particle + antiparticle pairs. To an observer experiencing uniform acceler…
The QCD running coupling at all scales and the connection between hadron masses and Î_s
Alexandre Deur
We report on recent experimental and theoretical developments in our understanding of the QCD running coupling α_s in QCD's nonperturbative regime. They allow us to analytically c…
Nonperturbative strange-quark sea from lattice QCD, light-front holography, and meson-baryon fluctuation models
Raza Sabbir Sufian, Tianbo Liu, Guy F. de Téramond +5
We demonstrate that a nonzero strangeness contribution to the spacelike electromagnetic form factor of the nucleon is evidence for a strange-antistrange asymmetry in the nucleon's…
AdS/QCD, Light-Front Holography, and the Nonperturbative Running Coupling
Stanley J. Brodsky, Guy F. de Teramond, Alexandre Deur
The combination of Anti-de Sitter space (AdS) methods with light-front (LF) holography provides a remarkably accurate first approximation for the spectra and wavefunctions of meson…
Universality of Generalized Parton Distributions in Light-Front Holographic QCD
Guy F. de Teramond, Tianbo Liu, Raza Sabbir Sufian +3
The structure of generalized parton distributions is determined from light-front holographic QCD up to a universal reparametrization function which incorporates Regge behavi…
Single-nucleon experiments
Alexandre Deur
We discuss the Jefferson Lab low momentum transfer data on moments of the nucleon spin structure functions and and on single charged pion electroproduction off polarize…
50 Years of Quantum Chromodynamics
Franz Gross, Eberhard Klempt, Stanley J. Brodsky +92
This paper presents a comprehensive review of both the theory and experimental successes of Quantum Chromodynamics, starting with its emergence as a well defined theory in 1972-73…
The strong coupling in the nonperturbative and near-perturbative regimes
Guy F. de Teramond, Arpon Paul, Stanley J. Brodsky +4
We use analytic continuation to extend the gauge/gravity duality nonperturbative description of the strong force coupling into the transition, near-perturbative, regime where pertu…
Connecting the Hadron Mass Scale to the Fundamental Mass Scale of Quantum Chromodynamics
Alexandre Deur, Stanley J. Brodsky, Guy F. de Teramond
Establishing an explicit connection between the long distance physics of confinement and the dynamical interactions of quarks and gluons at short distances has been a long-sought g…
Determination of the Proton Spin Structure Functions for 0.05 < Q^2 < 5 GeV^2 using CLAS
Robert Fersch, Nevzat Guler, Peter Bosted +7
We present the results of our final analysis of the full data set of g_1^p(Q^2), the spin structure function of the proton, collected using CLAS at Jefferson Lab in 2000-2001. Pola…
Superconformal Algebraic Approach to Hadron Structure
Guy F. de Teramond, Stanley J. Brodsky, Alexandre Deur +2
Fundamental aspects of nonperturbative QCD dynamics which are not obvious from its classical Lagrangian, such as the emergence of a mass scale and confinement, the existence of a z…
Gluon matter distribution in the proton and pion from extended holographic light-front QCD
Guy F. de Téramond, H. G. Dosch, Tianbo Liu +3
The holographic light-front QCD framework provides a unified nonperturbative description of the hadron mass spectrum, form factors and quark distributions. In this article we exten…
Effect of gravitational field self-interaction on large structure formation
Alexandre Deur
We check whether General Relativity's field self-interaction alleviates the need for dark matter to explain the universe's large structure formation. We found that self-interaction…
The AdS/QCD Correspondence and Exclusive Processes
Stanley J. Brodsky, Guy F. de Téramond, Alexandre Deur
The AdS/CFT correspondence between theories in AdS space and conformal field theories in physical space-time provides an analytic, semi-classical, color-confining model for strongl…
Hubble Tension and Gravitational Self-Interaction
Corey Sargent, Alexandre Deur, Balsa Terzic
One of the most important problems vexing the CDM cosmological model is the Hubble tension. It arises from the fact that measurements of the present value of the Hubble paramet…
High precision measurement of phi-nucleon cross section using a tensor polarized deuteron target
Mark M. Dalton, Alexandre Deur, Chris D. Keith +2
We propose to measure the -nucleon cross section to solve the longstanding puzzle of whether mb, as extracted from photoproduction, or 30…
On the Evidence for Violation of the Equivalence Principle in Disk Galaxies
Corey Sargent, William Clark, Antonia Seifert +5
We examine the claimed observations of a gravitational external field effect (EFE) reported in Chae et al. We show that observations suggestive of the EFE can be interpreted withou…
The Heavy Photon Search Experiment
Nathan Baltzell, Marco Battaglieri, Mariangela Bondi +59
The Heavy Photon Search (HPS) experiment is designed to search for a new vector boson in the mass range of 20 MeV/ to 220 MeV/ that kinetically mixes with the…
Relativistic corrections to the rotation curves of disk galaxies
Alexandre Deur
We present a method to investigate relativistic effects arising from large masses. The method is non-perturbative and employs a mean-field approximation and gravitational lensing.…
Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions
Harut Avakian, Stanley J. Brodsky, Alexandre Deur +1
We study the quark helicity distributions at large x in perturbative QCD, taking into account contributions from the valence Fock states of the nucleon which have nonzero orbital a…
Potential for Tensor Polarized Deuterons in Hall D at Jefferson Lab
Mark M. Dalton, Alexandre Deur, Chris Keith
Hall D at Jefferson lab is an ideal place to install a polarized deuteron target which can be ''tensor polarized", allowing the separation of the spin states or the meas…
Results on spin sum rules and polarizabilities at low
Alexandre Deur
We report on recently published experimental results on spin sum rules, and particularly on the generalized spin polarizabilities (for both the proton and neutron) and…
A correlation between the amount of dark matter in elliptical galaxies and their shape
Alexandre Deur
We discuss the correlation between the dark matter content of elliptical galaxies and their ellipticities. We then explore a mechanism for which the correlation would emerge natura…
Significance of Gravitational Nonlinearities on the Dynamics of Disk Galaxies
Alexandre Deur, Corey Sargent, BalÅ¡a TerziÄ
The discrepancy between the visible mass in galaxies or galaxy clusters, and that inferred from their dynamics is well known. The prevailing solution to this problem is dark matter…
Strange Hadron Spectroscopy with Secondary KL Beam in Hall D
KLF Collaboration, Moskov Amaryan, Mikhail Bashkanov +150
We propose to create a secondary beam of neutral kaons in Hall D at Jefferson Lab to be used with the GlueX experimental setup for strange hadron spectroscopy. The superior CEBAF e…
A relation between the dark mass of elliptical galaxies and their shape
Alexandre Deur
We have studied a large number of elliptical galaxies and found a correlation between their dark matter content and the ellipticity of their visible shape. The galaxies were strict…
The Heavy Photon Search Test Detector
Marco Battaglieri, Sergey Boyarinov, Stephen Bueltmann +61
The Heavy Photon Search (HPS), an experiment to search for a hidden sector photon in fixed target electroproduction, is preparing for installation at the Thomas Jefferson National…
Nonperturbative QCD Coupling and its function from Light-Front Holography
Stanley J. Brodsky, Guy F. de Téramond, Alexandre Deur
The light-front holographic mapping of classical gravity in AdS space, modified by a positive-sign dilaton background, leads to a nonperturbative effective coupling $α_s^{AdS}(Q^2…
Clean measurements of the nucleon axial-vector and free-neutron magnetic form factors
Alexandre Deur
We discuss the feasibility of a weak charged current experiment using a low energy electron beam. A first goal is to measure the Q^2 dependence of the axial-vector form factor g_a(…
Analysis of nucleon electromagnetic form factors from light-front holographic QCD : The spacelike region
Raza Sabbir Sufian, Guy F. de Téramond, Stanley J. Brodsky +2
We present a comprehensive analysis of the spacelike nucleon electromagnetic form factors and their flavor decomposition within the framework of light-front holographic QCD. We sho…