Photoproduced dijets are a useful probe of gluon distributions inside nuclei. Recent ATLAS results from 2018 data are presented, showing the current progress in mapping these one-dimensional parton distributions with differential cross sections. To move forward in understanding higher order gluon distributions, the angular correlations of these gluons must be measured. CMS results from 2015...
We discuss the impact of soft gluon emissions on the azimuthal angular correlation between two jets produced in high energy collisions. We find a good description on the recent CMS data on dijet production in UPC events.
We present the MCscales approach for incorporating scale uncertainties in parton
distribution functions. The method builds on the Monte Carlo sampling method
for propagating experimental uncertainties to PDFs that underlies the NNPDF
approach, by extending it to the space of factorisation and renomalisation
scales for the processes entering a PDF fit . Our approach allows one to exactly...
The transverse momentum dependent and collinear factorization theorems are independent approaches to the description of scattering cross-sections at high energy. They operate with different set of universal distributions, namely, the transverse momentum distributions (TMDs) and collinear distributions. However, these distributions are not entire independent. In the regime of large transverse...
