LHC production of forward-center and forward-forward di-jets in the kt-factorization and transverse dependent unintegrated parton distribution frameworks

The present work is devoted to study the high-energy QCDevents, such as the di-jet productions from proton-proton inelastic collisions at the LHCin the forward-center and the forward-forward configurations. This provides us with much valuable case study, since such phenomena can provide a direct glimpse into the partonic behavior of a hadronin a dominant gluonic region. We use the unintegratedparton distribution functions (UPDF) in the kt-factorization framework. The UPDFof Kimberet al.(KMR) and Martinet al. (MRW) are generated in the leading order (LO) and next-to-leading order (NLO), using the Harland-Langet al. (MMHT2014) PDFlibraries. While working in the forward-center and the forward-forward rapidity sectors, one can probe the parton densities at very low longitudinal momentum fractions (x). Such a model computation can provide simpler analytic description of data with respect to existing formalisms such as perturbative QCD. The differential cross-section calculations are performed at the center of mass energy of 7TeV corresponding to CMScollaboration measurement. It is shown that the gluonic jet productions are dominant and a good description of data as well as other theoretical attempts (i.e. KS-linear, KS-nonlinear and rcBK) is obtained. The uncertainty of the calculations is derived by manipulating the hard scale of the processes by a factor of two. This conclusion is achieved, due to the particular visualization of the angular ordering constraint (AOC), that is incorporated in the definition of these UPDF. (C) 2017 The Authors. Published by Elsevier B.V.