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Title: Parton shower and NLO-matching uncertainties in Higgs boson pair production

Abstract

We perform a detailed study of NLO parton shower matching uncertainties in Higgs boson pair production through gluon fusion at the LHC based on a generic and process independent implementation of NLO subtraction and parton shower matching schemes for loop-induced processes in the Sherpa event generator. We take into account the full top-quark mass dependence in the two-loop virtual corrections and compare the results to an effective theory approximation. In the full calculation, our findings suggest large parton shower matching uncertainties that are absent in the effective theory approximation. Here, we observe large uncertainties even in regions of phase space where fixed-order calculations are theoretically well motivated and parton shower effects expected to be small. We compare our results to NLO matched parton shower simulations and analytic resummation results that are available in the literature.

Authors:
 [1]; ORCiD logo [2]
  1. Max Planck Inst. for Physics, Munich (Germany)
  2. SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1427164
Report Number(s):
SLAC-PUB-17190
Journal ID: ISSN 1029-8479; PII: 7707
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: 2018; Journal Issue: 2; 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

Jones, Stephen, and Kuttimalai, Silvan. Parton shower and NLO-matching uncertainties in Higgs boson pair production. United States: N. p., 2018. Web. doi:10.1007/jhep02(2018)176.
Jones, Stephen, & Kuttimalai, Silvan. Parton shower and NLO-matching uncertainties in Higgs boson pair production. United States. doi:10.1007/jhep02(2018)176.
Jones, Stephen, and Kuttimalai, Silvan. Wed . "Parton shower and NLO-matching uncertainties in Higgs boson pair production". United States. doi:10.1007/jhep02(2018)176. https://www.osti.gov/servlets/purl/1427164.
@article{osti_1427164,
title = {Parton shower and NLO-matching uncertainties in Higgs boson pair production},
author = {Jones, Stephen and Kuttimalai, Silvan},
abstractNote = {We perform a detailed study of NLO parton shower matching uncertainties in Higgs boson pair production through gluon fusion at the LHC based on a generic and process independent implementation of NLO subtraction and parton shower matching schemes for loop-induced processes in the Sherpa event generator. We take into account the full top-quark mass dependence in the two-loop virtual corrections and compare the results to an effective theory approximation. In the full calculation, our findings suggest large parton shower matching uncertainties that are absent in the effective theory approximation. Here, we observe large uncertainties even in regions of phase space where fixed-order calculations are theoretically well motivated and parton shower effects expected to be small. We compare our results to NLO matched parton shower simulations and analytic resummation results that are available in the literature.},
doi = {10.1007/jhep02(2018)176},
journal = {Journal of High Energy Physics (Online)},
number = 2,
volume = 2018,
place = {United States},
year = {Wed Feb 28 00:00:00 EST 2018},
month = {Wed Feb 28 00:00:00 EST 2018}
}

Journal Article:
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