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

Jones, Stephen; Kuttimalai, Silvan

doi:10.1007/jhep02(2018)176

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

Journal Article · Wed Feb 28 00:00:00 EST 2018 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep02(2018)176· OSTI ID:1427164

Jones, Stephen ^[1];

^[2]

Max Planck Inst. for Physics, Munich (Germany)
SLAC National Accelerator Lab., Menlo Park, CA (United States)

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.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1427164

Report Number(s):: SLAC-PUB-17190; PII: 7707; TRN: US1802456

Journal Information:: Journal of High Energy Physics (Online), Vol. 2018, Issue 2; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 27 works

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