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:
-
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- TU Dresden (Germany). Inst. of Nuclear and Particle Physics
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Technische Universität 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. https://doi.org/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. https://doi.org/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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