Conveners
Parallel 3: nPDF
- Dieter Roehrich (University of Bergen (NO))
Measurements of dijet production in heavy ion collisions can be used to probe the nuclear matter. In proton-lead collisions, the normalized average dijet pseudorapidity distributions can be used as a sensitive tool for constraining the nuclear modifications of parton distribution functions (nPDF) at different $Q^2$ scales and Bjorken-$x$. In such studies, it is possible to investigate, with a...
Measurements of top quarks in heavy-ion collisions are expected to provide novel probes of nuclear modifications to parton distribution functions as well as to bring unique information about the evolution of strongly interacting mat- ter. We report the observation of the top-quark pair production in proton-lead collisions at the centre-of-mass energy of 8.16 TeV in the ATLAS experiment at the...
The strong interaction, QCD, has been very successful in
describing perturbative processes between high-energetic quarks and
gluons, but nonperturbative quantities such as the (spin) structure of
the nucleon and nuclei are generally not accessible from first
principles. Parton distribution functions, PDFs, have to be obtained
from experiment and in part from lattice simulations. The PDFs...
Recently in the nCTEQ group we have performed a number of dedicated analyses investigating different important aspects related to nuclear parton distribution functions (nPDFs). This includes: analysis of the low-x distributions with help of p-Pb heavy quark(onium) data from the LHC; study of the high-x region by including JLAB DIS data and systematically investigating theoretical aspects...
The increasingly precise experimental data from LHC have led to global extractions of parton distribution functions with significantly improved accuracy. While there are ways to approximate some theoretical uncertainties like those arising from the choices of the factorization scale, alternative approaches to tame the remaining theoretical uncertainties may eventually be needed for precision...
With its precise vertex reconstruction and particle identification capabilities,
the LHCb detector is ideally suited to study the production and polarization
of primary and secondary particles. In particular, as the origin of hyperon po-
larization from unpolarized proton-proton and proton-nucleus collisions is not
yet fully understood, measurements in different collision systems and...
