KKMChh: Matching CEEX Photonic ISR to a QED-Corrected Parton Shower Article Swipe
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.22323/1.414.0887
· OA: W4309705224
KKMChh adapts the CEEX (Coherent Exclusive Exponentiation) formalism of the\nMonte Carlo Program KKMC for Z boson production and decay to hadron scattering.\nAmplitude-level soft photon exponentiation of initial and final state\nradiation, together with initial-final interference, is matched to a\nperturbative calculation to second order next-to-leading logarithm, and\nelectroweak corrections to the hard process are included via DIZET. The first\nrelease of KKMChh included complete initial state radiation calculated with\ncurrent quark masses. This version assumes idealized pure-QCD PDFs with\nnegligible QED contamination. Traditional PDFs neglect QED evolution but are\nnot necessarily free of QED influence in the data. QED-corrected PDFs provide a\nfirmer starting point for precision QED work. We describe a new procedure for\nmatching KKMChh's initial state radiation to a QED-corrected PDF, and compare\nthis to earlier approaches.\n
