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Title: Parton showers and matching uncertainties in top quark pair production with Herwig 7

Abstract

Abstract We evaluate the theoretical uncertainties in next-to-leading order plus parton shower predictions for top quark pair production and decay in hadronic collisions. Our work is carried out using the Herwig  7 event generator and presents an in-depth study of variations in matching schemes with two systematically different shower algorithms, the traditional angular-ordered and alternative dipole shower. We also present all of the required extensions of the Herwig dipole shower algorithm to properly take into account quark mass effects, as well as its ability to perform top quark decays. The predictions are compared at parton level as well as to Large Hadron Collider data, including in the boosted regime. We find that the regions where predictions with a non-top-quark-specific tune differ drastically from data are plagued by large uncertainties which are consistent between our two shower and matching algorithms.

Authors:
; ; ORCiD logo; ;
Publication Date:
Research Org.:
Florida State Univ., Tallahassee, FL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1619367
Alternate Identifier(s):
OSTI ID: 1802041
Grant/Contract Number:  
FG02-13ER41942; SC0010102; PIEF- GA-2013-628739
Resource Type:
Published Article
Journal Name:
European Physical Journal. C, Particles and Fields
Additional Journal Information:
Journal Name: European Physical Journal. C, Particles and Fields Journal Volume: 79 Journal Issue: 11; Journal ID: ISSN 1434-6044
Publisher:
Springer Science + Business Media
Country of Publication:
Germany
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Physics

Citation Formats

Cormier, Kyle, Plätzer, Simon, Reuschle, Christian, Richardson, Peter, and Webster, Stephen. Parton showers and matching uncertainties in top quark pair production with Herwig 7. Germany: N. p., 2019. Web. doi:10.1140/epjc/s10052-019-7370-7.
Cormier, Kyle, Plätzer, Simon, Reuschle, Christian, Richardson, Peter, & Webster, Stephen. Parton showers and matching uncertainties in top quark pair production with Herwig 7. Germany. https://doi.org/10.1140/epjc/s10052-019-7370-7
Cormier, Kyle, Plätzer, Simon, Reuschle, Christian, Richardson, Peter, and Webster, Stephen. Tue . "Parton showers and matching uncertainties in top quark pair production with Herwig 7". Germany. https://doi.org/10.1140/epjc/s10052-019-7370-7.
@article{osti_1619367,
title = {Parton showers and matching uncertainties in top quark pair production with Herwig 7},
author = {Cormier, Kyle and Plätzer, Simon and Reuschle, Christian and Richardson, Peter and Webster, Stephen},
abstractNote = {Abstract We evaluate the theoretical uncertainties in next-to-leading order plus parton shower predictions for top quark pair production and decay in hadronic collisions. Our work is carried out using the Herwig  7 event generator and presents an in-depth study of variations in matching schemes with two systematically different shower algorithms, the traditional angular-ordered and alternative dipole shower. We also present all of the required extensions of the Herwig dipole shower algorithm to properly take into account quark mass effects, as well as its ability to perform top quark decays. The predictions are compared at parton level as well as to Large Hadron Collider data, including in the boosted regime. We find that the regions where predictions with a non-top-quark-specific tune differ drastically from data are plagued by large uncertainties which are consistent between our two shower and matching algorithms.},
doi = {10.1140/epjc/s10052-019-7370-7},
journal = {European Physical Journal. C, Particles and Fields},
number = 11,
volume = 79,
place = {Germany},
year = {Tue Nov 12 00:00:00 EST 2019},
month = {Tue Nov 12 00:00:00 EST 2019}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1140/epjc/s10052-019-7370-7

Citation Metrics:
Cited by: 11 works
Citation information provided by
Web of Science

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