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Title: Momentum conservation and unitarity in parton showers and NLL resummation

Abstract

We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order to obtain a traditional, momentum and probability conserving parton shower based on the coherent branching formalism. The impact of each approximation is studied, and an overall comparison is made between the parton shower and pure NLL resummation. Differences compared to modern parton-shower algorithms formulated in terms of color dipoles are analyzed.

Authors:
ORCiD logo [1];  [2];  [2]
  1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  2. TU Dresden (Germany). Inst. of Nuclear and Particle Physics
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); TU Dresden (Germany)
Sponsoring Org.:
USDOE; German Academic Exchange Service (DAAD); German Research Foundation (DFG)
OSTI Identifier:
1425581
Grant/Contract Number:  
AC02-76SF00515; SI 2009/1-1
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: 1; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; QCD phenomenology

Citation Formats

Höche, Stefan, Reichelt, Daniel, and Siegert, Frank. Momentum conservation and unitarity in parton showers and NLL resummation. United States: N. p., 2018. Web. doi:10.1007/jhep01(2018)118.
Höche, Stefan, Reichelt, Daniel, & Siegert, Frank. Momentum conservation and unitarity in parton showers and NLL resummation. United States. doi:10.1007/jhep01(2018)118.
Höche, Stefan, Reichelt, Daniel, and Siegert, Frank. Tue . "Momentum conservation and unitarity in parton showers and NLL resummation". United States. doi:10.1007/jhep01(2018)118. https://www.osti.gov/servlets/purl/1425581.
@article{osti_1425581,
title = {Momentum conservation and unitarity in parton showers and NLL resummation},
author = {Höche, Stefan and Reichelt, Daniel and Siegert, Frank},
abstractNote = {We present a systematic study of differences between NLL resummation and parton showers. We first construct a Markovian Monte-Carlo algorithm for resummation of additive observables in electron-positron annihilation. Approximations intrinsic to the pure NLL result are then removed, in order to obtain a traditional, momentum and probability conserving parton shower based on the coherent branching formalism. The impact of each approximation is studied, and an overall comparison is made between the parton shower and pure NLL resummation. Differences compared to modern parton-shower algorithms formulated in terms of color dipoles are analyzed.},
doi = {10.1007/jhep01(2018)118},
journal = {Journal of High Energy Physics (Online)},
number = 1,
volume = 2018,
place = {United States},
year = {2018},
month = {1}
}

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Cited by: 2 works
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    Works referencing / citing this record:

    Jet Structure Studies in Small Systems
    journal, May 2019

    • Varga, Zoltán; Vértesi, Róbert; Barnaföldi, Gergely Gábor
    • Universe, Vol. 5, Issue 5
    • DOI: 10.3390/universe5050132

    Jet Structure Studies in Small Systems
    journal, May 2019

    • Varga, Zoltán; Vértesi, Róbert; Barnaföldi, Gergely Gábor
    • Universe, Vol. 5, Issue 5
    • DOI: 10.3390/universe5050132