IR-improved DGLAP-CS QCD parton showers in Pythia8

We introduce the recently developed IR-improved DGLAP-CS theory into the showers in Pythia8, as this Monte Carlo event generator is in wide use at LHC. We show that, just as it was true in the IR-improved shower Monte Carlo Herwiri, which realizes the IR-improved DGLAP-CS theory in the Herwig6.5 env...

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Bibliographic Details
Published in:Computer physics communications 2016-04, Vol.201, p.29-32
Main Author: Ward, B.F.L.
Format: Article
Language:English
Subjects:
Availability
Bosons
Computer simulation
Detectors
DGLAP-CS theory
Exact resummation
Large Hadron Collider
Monte Carlo methods
Parton shower
Quantum chromodynamics
Showers
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Summary:We introduce the recently developed IR-improved DGLAP-CS theory into the showers in Pythia8, as this Monte Carlo event generator is in wide use at LHC. We show that, just as it was true in the IR-improved shower Monte Carlo Herwiri, which realizes the IR-improved DGLAP-CS theory in the Herwig6.5 environment, the soft limit in processes such as single heavy gauge boson production is now more physical in the IR-improved DGLAP-CS theory version of Pythia8. This opens the way to one’s getting a comparison between the actual detector simulations for some of the LHC experiments between IR-improved and unimproved showers as Pythia8 is used in detector simulations at LHC whereas Herwig6.5, the environment of the only other IR-improved DGLAP-CS QCD MC in the literature, Herwiri1.031, is not any longer so used. Our achieving the availability of the IR-improved DGLAP-CS Pythia8 then is an important step in the further development of the LHC precision theory program under development by the author and his collaborators.
ISSN:0010-4655
1879-2944
DOI:10.1016/j.cpc.2015.12.008