180 citations · 472 across the 12 of their papers we have counts for
15 papers
Transverse Orbital Angular Momentum in the Proton
Osamah Alkasassbeh, Abha Rajan, Michael Engelhardt +1
Using the equations of motion of QCD and Lorentz invariance relations, we show a new, more direct way of obtaining the decomposition of the proton's quark transverse angular moment…
Quark spin-orbit correlations in the proton
M. Engelhardt, J. R. Green, N. Hasan +10
Generalized transverse momentum-dependent parton distributions (GTMDs) provide a comprehensive framework for imaging the internal structure of the proton. In particular, by encodin…
Parton distributions and lattice QCD calculations: toward 3D structure
Martha Constantinou, Aurore Courtoy, Markus A. Ebert +24
The strong force which binds hadrons is described by the theory of Quantum Chromodynamics (QCD). Determining the character and manifestations of QCD is one of the most important an…
Probing Nucleons and Nuclei in High Energy Collisions
Christine A. Aidala, Elke Aschenauer, Fatma Aslan +87
This volume is a collection of contributions for the 7-week program "Probing Nucleons and Nuclei in High Energy Collisions" that was held at the Institute for Nuclear Theory in Sea…
Near threshold and photo-production at JLab and RHIC
Yoshitaka Hatta, Abha Rajan, Di-Lun Yang
We update our previous calculation of photo-production near threshold \cite{Hatta:2018ina} by incorporating the recent developments in theory and the new experimental data fr…
Bounds on the Equation of State of Neutron Stars from High Energy Deeply Virtual Exclusive Experiments
Abha Rajan, Tyler Gorda, Simonetta Liuti +1
The recent detection of gravitational waves from merging neutron star events has opened a new window on the many unknown aspects of their internal dynamics. A key role in this cont…
Quark and gluon contributions to the QCD trace anomaly
Yoshitaka Hatta, Abha Rajan, Kazuhiro Tanaka
We show that, in dimensional reguralization in the minimal subtraction scheme, the QCD trace anomaly can be unambiguously decomposed into two parts coming from the renormalized qua…
Generalized Wandzura Wilczek Relations and Orbital Angular Momentum
Simonetta Liuti, Michael Engelhardt, Abha Rajan
New Lorentz Invariance Relations (LIRs) were presented between twist-three Generalized Parton Distributions (GPDs) and transverse momentum, , moments of twist-two Generalized…
Lorentz Invariance and QCD Equation of Motion Relations for Generalized Parton Distributions and the Dynamical Origin of Proton Orbital Angular Momentum
Abha Rajan, Michael Engelhardt, Simonetta Liuti
We derive new Lorentz Invariance and Equation of Motion Relations between twist-three Generalized Parton Distributions (GPDs) and moments in the parton transverse momentum, ,…
Twist Three Generalized Parton Distributions for Orbital Angular Momentum
Abha Rajan, Simonetta Liuti
We study the orbital angular momentum contribution to the spin structure of the proton. It is well known that the quark and gluon spin contributions do not add up to the proton spi…
Parton Transverse Momentum and Orbital Angular Momentum Distributions
Abha Rajan, Aurore Courtoy, Michael Engelhardt +1
The quark orbital angular momentum component of proton spin, , can be defined in QCD as the integral of a Wigner phase space distribution weighting the cross product of the qu…
Towards a Direct Measurement of the Quark Orbital Angular Momentum Distribution
Simonetta Liuti, Aurore Courtoy, Michael Engelhardt +1
We discuss two different definitions of partonic orbital angular momentum given in the literature in terms of the Fourier transform of a Wigner distribution, , and a twist…
Identification of Observables for Quark and Gluon Orbital Angular Momentum
Aurore Courtoy, Gary R. Goldstein, J. Osvaldo Gonzalez Hernandez +2
A new debate has recently arisen on the subject of orbital angular momentum in QCD, in particular on its observability and on its partonic interpretation. Orbital momentum can be d…
On the Observability of the Quark Orbital Angular Momentum Distribution
Aurore Courtoy, Gary R. Goldstein, J. Osvaldo Gonzalez Hernandez +2
We argue that due to Parity constraints, the helicity combination of the purely momentum space counterparts of the Wigner distributions -- the generalized transverse momentum distr…
Partonic Picture of Generalized Transverse Momentum Distributions
Simonetta Liuti, Aurore Courtoy, Gary R. Goldstein +2
We argue that due to parity constraints, the helicity combination of the purely momentum space counterparts of the Wigner distributions -- the generalized transverse momentum distr…