PhD Thesis: Intrinsic Charm in Proton


Despite rather long-term theoretical and experimental study, the hypothesis of the non-zero intrinsic (valence like) heavy quark component of the proton distribution functions has not yet been resolved. The LHC with its proton-proton (pp) collisions at √s = 7–14 TeV offers new insights into the structure of the proton. Using the first ATLAS data on the associated production of prompt photons and charm-quark jets in pp collisions at √s = 8 TeV the constrain on possible intrinsic charm is determined. The upper limit on intrinsic charm probability w < 1.97% at the 68% confidence level along with predictions for the possible pp → γ + c‑jet measurement at √s = 13 TeV is presented.