An analysis of unfolding methods for measurement of hadron dijet production cross sections

Nuclear physics

The comparison results of different methods of detector’s distortion elimination have been presented. The following methods were taken: bin-by-bin correction method, migration matrix inversion one, the one of maximal likelihood with Tikhonov regularisation (TUnfold), the one of singular value decomposition of the migration matrix (SVD), the one of D’Agostini iterations. The comparison of selected methods was performed through Monte Carlo simulation of hadron dijet production in proton-proton collisions at center-of-mass energy of 2.76 TeV and the simulation of а response of the CMS detector at Large Hadron Collider. The optimal scheme of unfolding was chosen for the measurement under study. Practical recommendations for building of unfolding procedure were given.