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 eve...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2018-02-01
|
| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/JHEP02(2018)176 |
| _version_ | 1818675333618991104 |
|---|---|
| author | Stephen Jones Silvan Kuttimalai |
| author_facet | Stephen Jones Silvan Kuttimalai |
| author_sort | Stephen Jones |
| collection | DOAJ |
| description | 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. 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. |
| first_indexed | 2024-12-17T08:25:55Z |
| format | Article |
| id | doaj.art-b8be76ec58c94aa689fa5dba6c0067a5 |
| institution | Directory Open Access Journal |
| issn | 1029-8479 |
| language | English |
| last_indexed | 2024-12-17T08:25:55Z |
| publishDate | 2018-02-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of High Energy Physics |
| spelling | doaj.art-b8be76ec58c94aa689fa5dba6c0067a52022-12-21T21:56:46ZengSpringerOpenJournal of High Energy Physics1029-84792018-02-012018212010.1007/JHEP02(2018)176Parton shower and NLO-matching uncertainties in Higgs boson pair productionStephen Jones0Silvan Kuttimalai1Max Planck Institute for PhysicsSLAC National Accelerator LaboratoryAbstract 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. 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.http://link.springer.com/article/10.1007/JHEP02(2018)176NLO ComputationsQCD Phenomenology |
| spellingShingle | Stephen Jones Silvan Kuttimalai Parton shower and NLO-matching uncertainties in Higgs boson pair production Journal of High Energy Physics NLO Computations QCD Phenomenology |
| title | Parton shower and NLO-matching uncertainties in Higgs boson pair production |
| title_full | Parton shower and NLO-matching uncertainties in Higgs boson pair production |
| title_fullStr | Parton shower and NLO-matching uncertainties in Higgs boson pair production |
| title_full_unstemmed | Parton shower and NLO-matching uncertainties in Higgs boson pair production |
| title_short | Parton shower and NLO-matching uncertainties in Higgs boson pair production |
| title_sort | parton shower and nlo matching uncertainties in higgs boson pair production |
| topic | NLO Computations QCD Phenomenology |
| url | http://link.springer.com/article/10.1007/JHEP02(2018)176 |
| work_keys_str_mv | AT stephenjones partonshowerandnlomatchinguncertaintiesinhiggsbosonpairproduction AT silvankuttimalai partonshowerandnlomatchinguncertaintiesinhiggsbosonpairproduction |