@article{08cab37d05eb4c618ad7e9bb6bedd692,
title = "Logarithmic accuracy of parton showers: a fixed-order study",
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.",
author = "Mrinal Dasgupta and Dreyer, \{Fr{\'e}d{\'e}ric A.\} and Keith Hamilton and Monni, \{Pier Francesco\} and Salam, \{Gavin P.\}",
note = "Funding Information: We are grateful to Stefan H{\"o}che, Paolo Nason, Torbj{\"o}rn Sj{\"o}strand, Peter Skands, Gregory Soyez, Bryan Webber and Giulia Zanderighi for helpful discussions and comments on the manuscript. We also thank a referee for bringing references [51, 53, 54] to our attention and for helpful comments. The work of P.F.M. has been supported by a Marie Sklo dowska Curie Individual Fellowship of the European Commission{\textquoteright}s Horizon 2020 Programme under contract number 702610 Resummation4PS. F.D. is supported by the SNF grant P2SKP2 165039 and by the Office of High Energy Physics of the U.S. Department of Energy (DOE) under grant DE-SC-0012567. K.H. was supported by the European Commission through the ERC Consolidator Grant HICCUP (No. 614577). K.H. also thanks the Science and Technology Facilities Council (STFC) for support via grant award ST/P000274/1. M.D. thanks the STFC for support via grant award ST/P000800/1 and the Publisher Copyright: {\textcopyright} 2018, The Author(s). Copyright: Copyright 2018 Elsevier B.V., All rights reserved.",
year = "2018",
month = sep,
day = "7",
doi = "10.1007/JHEP09(2018)033",
language = "English",
volume = "2018",
journal = "Journal of High Energy Physics",
issn = "1126-6708",
publisher = "Springer Nature",
number = "9",
}