Speaker
Ran Xu
(Central China Normal University CCNU (CN))
Description
Direct photons from Compton and annihilation hard processes, produced in hard scatterings of partons from incoming nucleons, are unique colourless probes of QCD processes. The measurement provides a handle for testing perturbative QCD predictions and constrain the parton distribution functions.
In this contribution, we present the measurements of isolated photon cross section in pp collisions at $\sqrt{s}=13$ TeV using the data collected by the ALICE with a trigger based on electromagnetic calorimeters. Isolation criterion is applied to select direct photons and reduce contamination from decay and fragmentation photons. The result will be compared to theoretical calculations.
Primary author
Ran Xu
(Central China Normal University CCNU (CN))
