The Observation of Jet Azimuthal Angular Decorrelation at FCC-ep

Abstract

Higher collision energies at future colliders may eventually lead to the falsification of standard fixed-order perturbation theory and linear evolutions due to non-linear structure of QCD at small-x. New physics researches that is strictly based on accurate jet measurements will undoubtedly have this observation known as BFKL effect via angular jet decorrelations taking into account the Mueller-Navelet jets. As one of the frontier colliders, FCC-ep, has a great observation potential on parton densities through asymmetrical collisions. We aim to test the observability of azimuthal angular jet decorrelations with the recent event generators (HERWIG, PYTHIA) at the particle level for FCC-ep centre of mass energies 3.5 TeV in proton-electron collisions. Jets are reconstructed by the Anti-kT algorithm (R = 0.5), with $p_T>35GeV$ and selected in the range of |y|<6. Relevant rapidity regions has been analyzed with the azimuthal-angle difference between Mueller-Navelet Jets ($\Delta \Phi$) in the rapidity seperation ($\Delta y$) and the distributions of cosn($\pi -\Delta \Phi$) are presented in comparison as the result.

arXiv comment11 pages, 15 figures, 3 tables. Accepted by IJMPA in 13/02/2023

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