Inclusive forward jet cross section measurement in proton - proton collisions at √s =7tev

Forward (di)jet studies provide an important testing ground for QCD predictions of the SM and give significant information for multiparton radiation, DGLAP and BFKL dynamics. This thesis presents measurement of cross section of inclusive forward jets and dijet events with at least one jet emitted at forward region in proton - proton collisions at √s = 7 TeV. The data for analysis are based on 3.14 pb-1 of luminosity events collected by the CMS detector in 2010. Jets are reconstructed with the anti-kT jet algorithm (R = 0.5) in the Hadronic Forward (HF) calorimeter at pseudorapidities 3.2 < | | < 4.7, in the transverse momentum range pT = 35 – 150 GeV/c. The measurement is compared to next-to-leading order (NLO) perturbative Quantum Chromodynamics (pQCD) calculations, to PYTHIA and HERWIG parton shower event generators with different tunes as well as to the CASCADE and HEJ Monte Carlo within the experimental and theoretical uncertainties.