Measurement Of Inclusive Jet Cross-Section In Proton-Proton Collisions At √s = 13TeV Using The CMS Detector At The LHC

The theory of Quantum Chromodyanmics (QCD) is one of the fundamental underlying theories to describe interactions among quarks and gluons. In QCD, partons (quarks and gluons) are produced in hadron-hadron collision with large cross-sections. Partons, immediately after production, fragment and hadronize forming a cluster of collimated energetic colorless particles, hadrons. A clustering algorithm is applied on these particles to form a collection of particles which are called jets, the experimental analogue of partons and one of the key objects in the theory of QCD. However, formation of jets out of produced partons due to hadron-hadron collision is a very nontrivial phenom- ena. Hence Inclusive Jet cross-section measurement is an important and essential study at every new energy regime. The jets serve as the background for most other searches in a collider experiment. A detailed description of double differential inclusive jet cross- section measurement using proton-proton collision data from the CMS detector at CERN is presented. The center-of-mass energy is 13 TeV. The data used for this analysis correspond to 71.52 pb -1. Measurement of the efficiencies of the triggers used is presented in detail. Jets are clustered with the Anti kT clustering algorithm. The measured cross- section is unfolded to get rid of all detector effects. Various aspects of systematic uncertainties are discussed and estimated. Corrections for non-perturbative effects are also performed. Finally, the cross-section is presented as a function of jet momentum in various rapidity bins. For the first time, super forward rapidity region is included in the measurement. The measured cross-section will be used to extract the value of the strong coupling constant and to study its scale dependence on a wider kinematic range than the one accessible at lower energies.