396 citations · 12.1k across the 280 of their papers we have counts for
36 papers · 1 filter
The mechanical radius of the proton
V. D. Burkert, L. Elouadrhiri, F. X. Girod
We present the first determination of the proton mechanical radius. The result was obtained by employing a novel theoretical approach that connects experimental data of deeply virt…
The Present and Future of QCD
P. Achenbach, D. Adhikari, A. Afanasev +400
This White Paper presents the community inputs and scientific conclusions from the Hot and Cold QCD Town Meeting that took place September 23-25, 2022 at MIT, as part of the Nuclea…
Colloquium: Gravitational Form Factors of the Proton
V. D. Burkert, L. Elouadrhiri, F. X. Girod +3
The physics of the gravitational form factors of the proton, and their understanding within quantum chromodynamics, has advanced significantly in the past two decades through both…
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…
Nucleon resonances and transition form factors
Volker D. Burkert
This is a contribution to the review 50 Years of Quantum Chromodynamics edited by F. Gross and E. Klempt, to be published in Journal EPJC. This contribution reviews the nucleon res…
Light-quark baryons
Volker Burkert, Eberhard Klempt, Ulrike Thoma
This is a contribution to the review "50 Years of Quantum Chromdynamics" edited by F. Gross and E. Klempt [arXiv:2212.11107], to be published in EPJC. The contribution reviews the…
Note on the definitions of branching ratios of overlapping resonances
V. Burkert, V. Crede, E. Klempt +8
Branching ratios for the decay of hadrons with large width or near thresholds depend on their definition. We test different definitions and show that rather different branching rat…
Experimental determination of the QCD effective charge
A. Deur, V. Burkert, J. P. Chen +1
The QCD effective charge is an observable that characterizes the magnitude of the strong interaction. At high momentum , it coincides with the QCD running coupling…
Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data
A. N. Hiller Blin, W. Melnitchouk, V. I. Mokeev +4
Nucleon resonance contributions to the inclusive proton and structure functions are computed from resonance electroexcitation amplitudes in the mass range up to 1.75 Ge…
QCD2019 Workshop Summary
S. J. Brodsky, V. D. Burkert, D. S. Carman +26
The topical workshop {\it Strong QCD from Hadron Structure Experiments} took place at Jefferson Lab from Nov. 6-9, 2019. Impressive progress in relating hadron structure observable…
Nucleon resonance contributions to unpolarised inclusive electron scattering
A. N. Hiller Blin, V. Mokeev, M. Albaladejo +8
The first CLAS12 experiments will provide high-precision data on inclusive electron scattering observables at a photon virtuality ranging from 0.05 GeV to 12 GeV and…
Configuration mixings and light-front relativistic quark model predictions for the electroexcitation of the Delta(1232)3/2+, N(1440)1/2+, and Delta(1600)3/2+
I. G. Aznauryan, V. D. Burkert
We investigate the impact of the configurations mixings that follow from QCD-inspired interquark forces on our results for the electroexcitation of the Delta(1232)3/2+, N(1440)1/2+…
Model discrimination in pseudoscalar-meson photoproduction
J. Nys, J. Ryckebusch, D. G. Ireland +1
To learn about a physical system of interest, experimental results must be able to discriminate among models. We introduce a geometrical measure to quantify the distance between mo…
Electroexcitation of the Delta(1232)3/2+ and Delta(1600)3/2+ in a light-front relativistic quark model
I. G. Aznauryan, V. D. Burkert
The magnetic-dipole form factor and the ratios R_EM and R_SM for the gamma* N -> Delta(1232)3/2}+ transition are predicted within light-front relativistic quark model up to photon…
Pre-Town Meeting on Spin Physics at an Electron-Ion Collider
Elke-Caroline Aschenauer, Ian Balitsky, Leslie Bland +29
A polarized collider (Electron--Ion Collider, or EIC), with polarized proton and light-ion beams and unpolarized heavy-ion beams with a variable center--of--mass energy $\s…
Nucleon electromagnetic form factors and electroexcitation of low lying nucleon resonances in a light-front relativistic quark model
I. G. Aznauryan, V. D. Burkert
We utilize a light-front relativistic quark model (LF RQM) to predict the 3q core contribution to the electroexcitation amplitudes for the Delta(1232)P33, N(1440)P11, N(1520)D13, a…
Electroexcitation of nucleon resonances
I. G. Aznauryan, V. D. Burkert
We review recent progress in the investigation of the electroexcitation of nucleon resonances, both in experiment and in theory. The most accurate results have been obtained for th…
m_pi and N_c dependence of resonances from Unitarized Chiral Perturbation Theory
G. Rios, C. Hanhart, J. R. Pelaez
We review our studies on the rho and sigma resonances properties derived from the Inverse Amplitude Method. In particular, we study the leading behavior of the resonances m…
Model Analysis of the Electroproduction Reaction on the Proton
Viktor Mokeev, Volker Burkert, Tsung-Shung H. Lee +3
Recent CLAS data on the electroproduction off protons at 1.3W1.57 GeV and 0.250.6 GeV have been analyzed using a meson-baryon phenomenological mo…
Determination of the effective strong coupling constant alpha_{s,g_1}(Q^2) from CLAS spin structure function data
A. Deur, V. Burkert, J. P. Chen +1
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 hig…
A Bayesian analysis of pentaquark signals from CLAS data
The CLAS Collaboration, D. G. Ireland
We examine the results of two measurements by the CLAS collaboration, one of which claimed evidence for a pentaquark, whilst the other found no such evidence. The unique fe…
Phenomenological studies of double charged pion electroproduction from the CLAS data
Victor Mokeev, Volker Burkert
Recent results from phenomenological studies of the CLAS data on 2 electroproduction off proton are presented. The analysis is focused on extracting of N electroma…
Quark-Hadron Duality in Spin Structure Functions g1p and g1d
P. E. Bosted, K. V. Dharmawardane, G. E. Dodge +3
New measurements of the spin structure functions of the proton and deuteron g1p(x,Q2) and g1d(x,Q2) in the nucleon resonance region are compared with extrapolations of target-mass-…
Phenomenological analysis of the CLAS data on double charged pion photo and electro- production
V. I. Mokeev, V. D. Burkert, L. Elouadrhiri +5
First comprehensive data on the evolution of nucleon resonance photocouplings with photon virtuality Q^2 are presented for excited proton states in the mass range from 1.4 to 2.0 G…