Logarithmic accuracy of parton showers: a fixed-order study
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13130_2018_Article_8961.pdf
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Author(s)
Dasgupta, Mrinal
Hamilton, Keith
Monni, Pier Francesco
Salam, Gavin P.
Dreyer, Frederic
Date Issued
September 2018
Journal
Journal of High Energy Physics
Publisher
Springer Berlin Heidelberg
Citation
Dasgupta, Mrinal, et al. “Logarithmic Accuracy of Parton Showers: A Fixed-Order Study.” Journal of High Energy Physics, vol. 2018, no. 9, Sept. 2018.
Version
Final published version
Abstract
We formulate some first fundamental elements of an approach for assessing the logarithmic accuracy of parton-shower algorithms based on two broad criteria: their ability to reproduce the singularity structure of multi-parton matrix elements, and their ability to reproduce logarithmic resummation results. We illustrate our approach by considering properties of two transverse-momentum ordered final-state showers, examining features up to second order in the strong coupling. In particular we identify regions where they fail to reproduce the known singular limits of matrix elements. The characteristics of the shower that are responsible for this also affect the logarithmic resummation accuracies of the shower, both in terms of leading (double) logarithms at subleading NC and next-to-leading (single) logarithms at leading NC. Keywords: NLO Computations, QCD Phenomenology
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1007/JHEP09(2018)033
