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Title: Implementing NLO DGLAP evolution in parton showers

Abstract

Here, we present a parton shower which implements the DGLAP evolution of parton densities and fragmentation functions at next-to-leading order precision up to effects stemming from local four-momentum conservation. The Monte-Carlo simulation is based on including next-to-leading order collinear splitting functions in an existing parton shower and combining their soft enhanced contributions with the corresponding terms at leading order. Soft double counting is avoided by matching to the soft eikonal. Example results from two independent realizations of the algorithm, implemented in the two event generation frameworks Pythia and Sherpa, illustrate the improved precision of the new formalism.

Authors:
ORCiD logo [1];  [2];  [3]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. Durham Univ., Durham (United Kingdom)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1407421
Report Number(s):
SLAC-PUB-16965
Journal ID: ISSN 1029-8479; PII: 6851; TRN: US1703148
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2017; Journal Issue: 10; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Jets; QCD Phenomenology

Citation Formats

Hoche, Stefan, Krauss, Frank, and Prestel, Stefan. Implementing NLO DGLAP evolution in parton showers. United States: N. p., 2017. Web. doi:10.1007/JHEP10(2017)093.
Hoche, Stefan, Krauss, Frank, & Prestel, Stefan. Implementing NLO DGLAP evolution in parton showers. United States. doi:10.1007/JHEP10(2017)093.
Hoche, Stefan, Krauss, Frank, and Prestel, Stefan. Fri . "Implementing NLO DGLAP evolution in parton showers". United States. doi:10.1007/JHEP10(2017)093. https://www.osti.gov/servlets/purl/1407421.
@article{osti_1407421,
title = {Implementing NLO DGLAP evolution in parton showers},
author = {Hoche, Stefan and Krauss, Frank and Prestel, Stefan},
abstractNote = {Here, we present a parton shower which implements the DGLAP evolution of parton densities and fragmentation functions at next-to-leading order precision up to effects stemming from local four-momentum conservation. The Monte-Carlo simulation is based on including next-to-leading order collinear splitting functions in an existing parton shower and combining their soft enhanced contributions with the corresponding terms at leading order. Soft double counting is avoided by matching to the soft eikonal. Example results from two independent realizations of the algorithm, implemented in the two event generation frameworks Pythia and Sherpa, illustrate the improved precision of the new formalism.},
doi = {10.1007/JHEP10(2017)093},
journal = {Journal of High Energy Physics (Online)},
number = 10,
volume = 2017,
place = {United States},
year = {Fri Oct 13 00:00:00 EDT 2017},
month = {Fri Oct 13 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
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Cited by: 4 works
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