Conveners
Day 3 (mostly Spin/TMDs): Morning session
- Miguel Echevarria (University of Alcala)
Day 3 (mostly Spin/TMDs): Afternoon session (incl. EIC)
- Daniel Boer
Presentation materials
Quarkonium emissions in forward as well as in central directions of rapidity are widely recognized as excellent channels to access the nucleon structure in the high-energy/small-
Status of Next-to-Leading order calculation of the High-Energy Factorization coefficient function for the inclusive heavy-quarkonium photoproduction will be presented. The one-loop correction to the leading-order process:
R(q1) + gamma(q) -> c\bar{c} [1S0^(8)],
where R-Reggeized gluon with four-momentum q1=x1P1+qT1, qT1.P1=0, will be discussed within an effective-action framework...
In this talk I will discuss the TMD factorization and shape functions for quarkonium production in direct photo and lepto-production. The leading power contribution from color octets yields a more familiar form for the factorized cross section involving the quarkonium TMD-shape functions. The singlet contribution, which can be enhanced due to relative velocity power-counting, involves...
Based on generator-level simulations, a number of potential problems and pitfalls of the measurement of gluon TMD in the jpsi+gamma final state will be presented, and remedies suggested.
Measurements of heavy quark bound states, like J/psi meson, provide a unique opportunity to study QCD properties. General features of quarkonia production such as cross-sections and transverse momentum distributions are well described by many existing models. In order to differentiate between various models one has to study quarkonia production in more details. One of the observables which can...
We study transverse Single-Spin Asymmetries (SSAs) for
In our work we are interested in the transverse single-spin asymmetry (TSSA) of
We study the Sivers azimuthal asymmetry, and the role of the gluonSivers function (GSF), in inelastic
We present a recent calculation of
Transverse momentum dependent parton distribution functions (TMDs) are extensions of the well-known collinear PDFs. They contain, apart from the usual x- and scale dependence, also information on the intrinsic transverse momentum carried by the parton, and on the spin correlations.
Experimentally, not so much is known about gluon TMDs, since they are subleading with respect to their quark...