Ph.D. Project: QCD corrections to quarkonium production in TMD factorization: applications to the LHC and EIC

Supervised by prof. D. Boer & dr. JP. Lansberg 

Four year research (1.0 FTE)

The objective of my PhD project is to advance the theory description of gluon induced quarkonium production within TMD factorisation by taking into account radiative QCD corrections both in the TMD evolution and in the hard scattering. Two class of processes are considered in two classes of reactions: both single and associated quarkonium production, both in proton-proton and electron-proton collisions (LHC and EIC). The study is carried out within the framework of NRQCD, and will include the hadroproduction of pseudo-scalar quarkonia via colour-singlet transition, the photoproduction of J/ψ quarkonium states via colour-octet transitions, the electroproduction (SIDIS) of J/ψ states via colour-octet transitions, the associated hadroproduction of J/ψ and states via colour-singlet transitions.

MSc. Thesis: The glueball spectrum in large-N Quantum Chromodynamics

Supervised by prof. E. Pallante 

One year research (1.0 FTE)

The aim of this work was to set up and employ lattice simulations to determine the glueball spectrum in the large-N limit as a fundamental probe of confinement, and, specifically, to verify a recently proposed exact solution of large-N Yang-Mills theory. A pure Yang-Mills lattice implementation was developed in-house, and first tests for the determination of the scalar 0(+,+) glueball mass in SU(2) were performed. An upper limit for this mass was found using noise reduction algorithms on the two-point connected glueball correlator, since the latter is particularly difficult to extract. From this it was found that a high degree of improvement strategy is necessary in order to be able to measure the glueball spectrum at large-N. Click here for the full thesis.

BSc. Thesis: Water in Protoplanetary Disks

Supervised by prof. I.E.E. Kamp 

Three months research (1.0 FTE)

The aim of this research was to gain a better insight in the water distribution within protoplanetary disks. In this study water column densities have been calculated as function of distance from the star for several models with different parameters by using the ProDiMo code. Fits were made to surface density profiles, which in turn where used to investigate possible correlations between the parameters and the radial water column density profile. The snow line (region), the point at which water freezes out, was obtained from these models. By relating the snow line to the changing parameters, the gas mass and faring parameter of the disk turned out to affect the position of the snow line. Also the water emission lines where extracted from the code and were related to the parameters. When searching for a relation between the emission line ratios of some prominent lines and the position of the snow line, a tentative relation was found. Click here for the full thesis.