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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. Here, 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 N C and next-to-leading (single) logarithms at leading N C.

Authors:
 [1]; ORCiD logo [2];  [3];  [4];  [5]
  1. Univ. of Manchester, Manchester (United Kingdom). Consortium for Fundamental Physics, School of Physics and Astronomy
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Center for Theoretical Physics
  3. Univ. College London, London (United Kingdom). Dept. of Physics and Astornomy; European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theoretical Physics Dept.
  4. European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theoretical Physics Dept.
  5. European Organization for Nuclear Research (CERN), Geneva (Switzerland). Theoretical Physics Dept.; CNRS, Paris (France); Rudolf Peierls Centre for Theoretical Physics
Publication Date:
Research Org.:
Massachusetts Inst. of Technology, Cambridge (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1499042
Grant/Contract Number:  
SC0012567
Resource Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 9; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; NLO Computations; QCD Phenomenology

Citation Formats

Dasgupta, Mrinal, Dreyer, Frédéric A., Hamilton, Keith, Monni, Pier Francesco, and Salam, Gavin P. Logarithmic accuracy of parton showers: a fixed-order study. United States: N. p., 2018. Web. doi:10.1007/jhep09(2018)033.
Dasgupta, Mrinal, Dreyer, Frédéric A., Hamilton, Keith, Monni, Pier Francesco, & Salam, Gavin P. Logarithmic accuracy of parton showers: a fixed-order study. United States. doi:10.1007/jhep09(2018)033.
Dasgupta, Mrinal, Dreyer, Frédéric A., Hamilton, Keith, Monni, Pier Francesco, and Salam, Gavin P. Fri . "Logarithmic accuracy of parton showers: a fixed-order study". United States. doi:10.1007/jhep09(2018)033. https://www.osti.gov/servlets/purl/1499042.
@article{osti_1499042,
title = {Logarithmic accuracy of parton showers: a fixed-order study},
author = {Dasgupta, Mrinal and Dreyer, Frédéric A. and Hamilton, Keith and Monni, Pier Francesco and Salam, Gavin P.},
abstractNote = {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. Here, 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.},
doi = {10.1007/jhep09(2018)033},
journal = {Journal of High Energy Physics (Online)},
number = 9,
volume = 2018,
place = {United States},
year = {2018},
month = {9}
}

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Cited by: 14 works
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    Works referencing / citing this record:

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