Misurazioni della sezione d'urto di produzione di mesoni B in collisioni protone-protone a 13 TeV con il detector CMS

The upgrade of the Large Hadron Collider(LHC) to an energy of 13 TeV in the centre-of-mass frame and the increment of instantaneous luminosity will allow to achieve a better understanding of the production mechanism underlying the production of heavy mesons. The study of heavy mesons composed by quarks like b and c will give a rich experimental scenario for the understanding of QCD, the theory of strong interactions. The goal of this analysis is the measurement of the cross section for the process pp\ -> Bc -> J/\psi pi and pp -> B+ -> J/psi K with 2016 data acquired with the Compact Muon Solenoid(CMS) detector performed in the J/\psi ->mu mu channel plus a charged track pi/K. This analysis was partly awed out at LIP centre of particle research in Lisboa with the support of the Erasmus Traineeships program.