We present the computation of the differential cross section for the process p p ( p ¯ $$ \overline{p} $$ ) → (W + W − b b ¯ $$ \overline{\mathrm{b}} $$ →) e + ν e μ − ν ¯ $$ \overline{\nu} $$ μ b b ¯ $$ \overline{\mathrm{b}} $$ + X at NLO QCD accuracy matched to Shower Monte Carlo (SMC) simulations using PowHel, on the basis of the interface between HELAC-NLO and POWHEG-BOX. We include all resonant and non-resonant contributions. This is achieved by fully taking into account the effect of off-shell t-quarks and off-shell W-bosons in the complex mass scheme. We also present a program called DECAYER that can be used to let the t-quarks present in the event files for p p ( p ¯ $$ \overline{p} $$ ) → t t ¯ $$ \overline{\mathrm{t}} $$ X processes decay including both the finite width of the t-quarks and spin correlations. We present predictions for both the Tevatron and the LHC, with emphasis on differences emerging from three different W + W − b b ¯ $$ \overline{\mathrm{b}} $$ hadroproduction computations: (i) full implementation of the p p ( p ¯ $$ \overline{p} $$ ) → W + W − b b ¯ $$ \overline{\mathrm{b}} $$ process, (ii) generating on-shell t-quarks pushed off-shell with a Breit-Wigner finite width and decayed by Decayer, and (iii) on-shell t-quark production followed by decay in the narrow width approximation, as described by the SMC.
{ "_oai": { "updated": "2018-05-01T11:03:52Z", "id": "oai:repo.scoap3.org:3664" }, "authors": [ { "raw_name": "Maria Vittoria Garzelli", "affiliations": [ { "country": "Hungary", "value": "Institute of Physics and MTA-DE Particle Physics Research Group, University of Debrecen, H-4010 Debrecen P.O.Box 105, Hungary" } ], "surname": "Garzelli", "given_names": "Maria Vittoria", "full_name": "Garzelli, Maria Vittoria" }, { "raw_name": "Adam Kardos", "affiliations": [ { "country": "Hungary", "value": "Institute of Physics and MTA-DE Particle Physics Research Group, University of Debrecen, H-4010 Debrecen P.O.Box 105, Hungary" } ], "surname": "Kardos", "given_names": "Adam", "full_name": "Kardos, Adam" }, { "raw_name": "Zolt\u00e1n Tr\u00f3cs\u00e1nyi", "affiliations": [ { "country": "Hungary", "value": "Institute of Physics and MTA-DE Particle Physics Research Group, University of Debrecen, H-4010 Debrecen P.O.Box 105, Hungary" } ], "surname": "Tr\u00f3cs\u00e1nyi", "given_names": "Zolt\u00e1n", "full_name": "Tr\u00f3cs\u00e1nyi, Zolt\u00e1n" } ], "titles": [ { "source": "Springer/SISSA", "title": "Hadroproduction of W + W \u2212 b b \u00af $$ \\overline{\\mathrm{b}} $$ at NLO accuracy matched with shower Monte Carlo programs" } ], "dois": [ { "value": "10.1007/JHEP08(2014)069" } ], "publication_info": [ { "page_start": "069", "material": "article", "journal_title": "Journal of High Energy Physics", "year": 2014 } ], "$schema": "http://repo.scoap3.org/schemas/hep.json", "acquisition_source": { "date": "2014-08-15T00:00:00", "source": "Springer/SISSA", "method": "scoap3", "submission_number": "6f57b39a4d2711e8b67702163e01809a" }, "page_nr": [ 41 ], "license": [ { "url": "http://creativecommons.org/licenses/by/4.0/", "license": "CC-BY-4.0" } ], "copyright": [ { "statement": "The Author(s)" } ], "control_number": "3664", "record_creation_date": "2014-08-15T00:00:00", "_files": [ { "checksum": "md5:c41f497e47479fc59fcdfb3dc570e440", "filetype": "xml", "bucket": "aa18d3de-9ad3-4642-862a-3f5103554245", "version_id": "b11ec824-f3e3-40c9-b757-757b1e109d25", "key": "10.1007/JHEP08(2014)069.xml", "size": 111709 }, { "checksum": "md5:0cda0279b8d1a0939d0372922e534fe6", "filetype": "pdf/a", "bucket": "aa18d3de-9ad3-4642-862a-3f5103554245", "version_id": "eab9bdb7-24c2-4d8e-8da2-b21f688f475a", "key": "10.1007/JHEP08(2014)069_a.pdf", "size": 1065311 } ], "arxiv_eprints": [ { "categories": [ "hep-ph" ], "value": "1405.5859" } ], "abstracts": [ { "source": "Springer/SISSA", "value": "We present the computation of the differential cross section for the process p p ( p \u00af $$ \\overline{p} $$ ) \u2192 (W + W \u2212 b b \u00af $$ \\overline{\\mathrm{b}} $$ \u2192) e + \u03bd e \u03bc \u2212 \u03bd \u00af $$ \\overline{\\nu} $$ \u03bc b b \u00af $$ \\overline{\\mathrm{b}} $$ + X at NLO QCD accuracy matched to Shower Monte Carlo (SMC) simulations using PowHel, on the basis of the interface between HELAC-NLO and POWHEG-BOX. We include all resonant and non-resonant contributions. This is achieved by fully taking into account the effect of off-shell t-quarks and off-shell W-bosons in the complex mass scheme. We also present a program called DECAYER that can be used to let the t-quarks present in the event files for p p ( p \u00af $$ \\overline{p} $$ ) \u2192 t t \u00af $$ \\overline{\\mathrm{t}} $$ X processes decay including both the finite width of the t-quarks and spin correlations. We present predictions for both the Tevatron and the LHC, with emphasis on differences emerging from three different W + W \u2212 b b \u00af $$ \\overline{\\mathrm{b}} $$ hadroproduction computations: (i) full implementation of the p p ( p \u00af $$ \\overline{p} $$ ) \u2192 W + W \u2212 b b \u00af $$ \\overline{\\mathrm{b}} $$ process, (ii) generating on-shell t-quarks pushed off-shell with a Breit-Wigner finite width and decayed by Decayer, and (iii) on-shell t-quark production followed by decay in the narrow width approximation, as described by the SMC." } ], "imprints": [ { "date": "2014-08-11", "publisher": "Springer/SISSA" } ] }