This report describes the physics case, the resulting detector requirements, and the evolving
detector concepts for the experimental program at the Electron-Ion Collider (EIC). The EIC …

The physics of the gravitational form factors of the proton, as well as their understanding
within quantum chromodynamics, has advanced significantly in the past two decades …

The general question, crucial to an understanding of the internal structure of the nucleon, of
how to split the total angular momentum of a photon or gluon into spin and orbital …

We discuss in detail the distributions of energy, radial pressure and tangential pressure
inside the nucleon. In particular, this discussion is carried on in both the instant form and the …

A bstract We revisit the problem of small Bjorken-x evolution of the gluon and flavor-singlet
quark helicity distributions in the shock wave (s-channel) formalism. Earlier works on the …

The physics case for quarkonium-production studies accessible at the US Electron Ion
Collider is described.

Using a recently developed light-front spectator model that incorporates gluon, where the
light-front wave functions are modeled from the soft-wall anti–de Sitter/QCD prediction, we …

Is gauge-invariant complete decomposition of the nucleon spin possible? Although it is a
difficult theoretical question which has not reached a complete consensus yet, a general …

Definitions of orbital angular momentum based on Wigner distributions are used as a
framework to discuss the connection between the Ji definition of the quark orbital angular …

Generalized transverse-momentum dependent parton distributions (GTMDs) encode the
most general parton structure of hadrons. Here we focus on two twist-2 GTMDs which are …