HERWIRI1.031: New Approach to Parton Shower MC's in Precision QCD Theory
B.F.L. Ward (1), S.A. Yost (2) ((1) Department of Physics, Baylor, University, Waco, TX, USA, (2) Department of Physics, The Citadel,, Charleston, SC, USA)
TL;DR
This paper introduces HERWIRI1.0(31), a new Monte Carlo generator implementing IR-improved DGLAP-CS kernels in HERWIG6.5, showing improved agreement with experimental data and potential implications for LHC physics.
Contribution
The paper develops and implements IR-improved DGLAP-CS kernels in HERWIG6.5, creating HERWIRI1.0(31) for more accurate QCD simulations.
Findings
HERWIRI1.0(31) shows better agreement with FNAL data.
IR-improved kernels enhance parton shower accuracy.
Potential impact on LHC phenomenology discussed.
Abstract
The new IR-improved Dokshitzer-Gribov-Lipatov-Altarelli-Parisi-Callan-Symanzik (DGLAP-CS) kernels recently developed by one of us is implemented in the HERWIG6.5 environment to generate a new MC, HERWIRI1.0(31), for hadron-hadron scattering at high energies. The comparison between the parton shower generated by the standard DGLAP-CS kernels and that generated by the new IR-improved DGLAP-CS kernels is illustrated using MC data. This is done for some of the respective exact {\cal O}(\alpha_s) corrected spectra using the seamless interfaces to MC@NLO while making comparisons with FNAL data. Some discussion of possible implications for LHC phenomenology is also presented.
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