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Indexed by:Journal Papers

Date of Publication:2020-04-08

Journal:EUROPEAN PHYSICAL JOURNAL C

Included Journals:SCIE

Volume:80

Issue:4

ISSN No.:1434-6044

Abstract:A new physics scenario shows that four-fermion operators of Nambu-Jona-Lasinio (NJL) type have a strongcoupling UV fixed point, where composite fermions F (bosons Pi) form as bound states of three (two) SM elementary fermions and they couple to their constituents via effective contact interactions at the composite scale Lambda approximate to O(TeV). We present a phenomenological study to investigate such composite particles at the LHC by computing the production cross sections and decay widths of composite fermions in the context of the relevant experiments at the LHC with pp collisions at root s = 13 TeV and root s = 14 TeV. Systematically examining all the different composite particles F and the signatures with which they can manifest, we found a vast spectrum of composite particles F that has not yet been explored at the LHC. Recasting the recent CMS results of the resonant channel pp -> e(+) F -> e(+)e(-)q (as F = E), we find that the composite fermionmass mF below 4.25 TeV is excluded for Lambda/mF = 1. We further highlight the region of parameter space where this specific composite particle F can appear using 3 ab(-1), expected by the High-Luminosity LHC, computing 3 and 5 sigma contour plots of its statistical significance.