Nuclear parton distributions and QCD matter properties from LHC data

Main funder

Funds granted by main funder (€)

599 565,00

Funding program

Academy Project, AoF (Academy of Finland)

Project timetable

Project start date: 01/09/2020

Project end date: 31/08/2024


This theory project has two closely interlinked research lines: Our aim is to develop

1. A new global analysis of nuclear parton distribution functions (nuclear PDFs), which includes LHC data from completely new, and all available, process types in proton-nucleus and nucleus-nucleus collisions. We will also work towards an NNLO analysis and a combined global free-proton PDF and nuclear PDF analysis. The practical objective here is a set (or sets) of nuclear PDFs of an unprecedented precision, intended for public use and as the new standard in the field. The theory objective is to probe the QCD collision dynamics, the validity of collinear factorization, in a wider kinematical range in nuclear collisions than ever before. With these developments, we aim to maintain our status as the leading nPDF analyst group worldwide.

2. A global analysis of QCD matter properties, which includes low-momentum particle-production observables both from the LHC and RHIC colliders. The analysis rests on significant further developments of our recent EbyE EKRT framework, where we compute the quark-gluon plasma initial conditions from perturbative QCD and saturation, and evolve the produced system with dissipative relativistic hydrodynamics, event by event. We aim at addressing the systematics of nucleus-nucleus collisions simultaneously with high-multiplicity proton-nucleus collisions in the determination of the QCD matter properties. A special focus is on a completely new event-by-event simulation of saturated minijet initial conditions for the QCD matter, currently under development work, which will give us a new possiblity to understand the origin of density fluctuations is these collisions. The ultimate goal here is to build a statistically rigorous global analysis for determining the QCD matter transport properties such as viscosities from all possible LHC and RHIC data. The project is internationally very important for a correct interpretation of the LHC data. Also with this research line, we wish to maintain our status among the very leading groups worldwide.

Principal Investigator

Primary responsible unit

Last updated on 2020-01-07 at 12:21