Leif Gellersen
Postdoc
Tackling the Uncertainties of Event Generators
Author
Summary, in English
Paper I presents an algorithm for tuning Monte Carlo event generators with high dimensional parameter spaces by splitting the parameter space algorithmically. The algorithm is tested in ideal conditions and real-life examples of tuning Herwig and Pythia for LEP.
Paper II concerns the perturbative uncertainty of unitarized next-to-leading order multi-jet merging prescriptions by discussing scale variations and scheme variations. The uncertainties are addressed for collisions at LEP and LHC.
Paper III deals with QCD/QED interference effects in parton showers. For this purpose, we implement a shower including QED and QCD emissions and tree-level matrix element corrections for fixed color configurations.
Paper IV proposes a method for the consistent removal of overlapping singularities in QCD parton showers at next-to-leading order in the strong coupling.
Department/s
- Theoretical Particle Physics - Has been reorganised
Publishing year
2021
Language
English
Full text
Document type
Dissertation
Publisher
Lund University (Media-Tryck)
Topic
- Subatomic Physics
Keywords
- QCD
- Phenomenology
- Parton Showers
- Matrix Element Merging
- Tuning
Status
Published
Supervisor
- Stefan Prestel
- Malin Sjödahl
ISBN/ISSN/Other
- ISBN: 978-91-8039-053-8
- ISBN: 978-91-8039-054-5
Defence date
25 November 2021
Defence time
10:00
Defence place
Lundmarksalen, Sölvegatan 27, Lund. Join via zoom: https://lu-se.zoom.us/j/64542025145
Opponent
- Jennifer Smillie (Doctor)