The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD

Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental...
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Gespeichert in:

Autor*in:	Bevilacqua, Giuseppe [verfasserIn] Bi, Huan-Yu [verfasserIn] Hartanto, Heribertus Bayu [verfasserIn] Kraus, Manfred [verfasserIn] Worek, Malgorzata [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	NLO Computations QCD Phenomenology

Übergeordnetes Werk:	Enthalten in: Journal of high energy physics - Berlin : Springer, 1997, 2020(2020), 8 vom: 10. Aug.
Übergeordnetes Werk:	volume:2020 ; year:2020 ; number:8 ; day:10 ; month:08

Links:	Volltext

DOI / URN:	10.1007/JHEP08(2020)043

Katalog-ID:	SPR040608328

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allfields	10.1007/JHEP08(2020)043 doi (DE-627)SPR040608328 (SPR)JHEP08(2020)043-e DE-627 ger DE-627 rakwb eng 530 ASE 33.46 bkl Bevilacqua, Giuseppe verfasserin aut The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation. NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213 Bi, Huan-Yu verfasserin aut Hartanto, Heribertus Bayu verfasserin aut Kraus, Manfred verfasserin aut Worek, Malgorzata verfasserin aut Enthalten in Journal of high energy physics Berlin : Springer, 1997 2020(2020), 8 vom: 10. Aug. (DE-627)320910571 (DE-600)2027350-2 1029-8479 nnns volume:2020 year:2020 number:8 day:10 month:08 https://dx.doi.org/10.1007/JHEP08(2020)043 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2020 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.46 ASE AR 2020 2020 8 10 08
spelling	10.1007/JHEP08(2020)043 doi (DE-627)SPR040608328 (SPR)JHEP08(2020)043-e DE-627 ger DE-627 rakwb eng 530 ASE 33.46 bkl Bevilacqua, Giuseppe verfasserin aut The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation. NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213 Bi, Huan-Yu verfasserin aut Hartanto, Heribertus Bayu verfasserin aut Kraus, Manfred verfasserin aut Worek, Malgorzata verfasserin aut Enthalten in Journal of high energy physics Berlin : Springer, 1997 2020(2020), 8 vom: 10. Aug. (DE-627)320910571 (DE-600)2027350-2 1029-8479 nnns volume:2020 year:2020 number:8 day:10 month:08 https://dx.doi.org/10.1007/JHEP08(2020)043 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2020 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.46 ASE AR 2020 2020 8 10 08
allfields_unstemmed	10.1007/JHEP08(2020)043 doi (DE-627)SPR040608328 (SPR)JHEP08(2020)043-e DE-627 ger DE-627 rakwb eng 530 ASE 33.46 bkl Bevilacqua, Giuseppe verfasserin aut The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation. NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213 Bi, Huan-Yu verfasserin aut Hartanto, Heribertus Bayu verfasserin aut Kraus, Manfred verfasserin aut Worek, Malgorzata verfasserin aut Enthalten in Journal of high energy physics Berlin : Springer, 1997 2020(2020), 8 vom: 10. Aug. (DE-627)320910571 (DE-600)2027350-2 1029-8479 nnns volume:2020 year:2020 number:8 day:10 month:08 https://dx.doi.org/10.1007/JHEP08(2020)043 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2020 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.46 ASE AR 2020 2020 8 10 08
allfieldsGer	10.1007/JHEP08(2020)043 doi (DE-627)SPR040608328 (SPR)JHEP08(2020)043-e DE-627 ger DE-627 rakwb eng 530 ASE 33.46 bkl Bevilacqua, Giuseppe verfasserin aut The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation. NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213 Bi, Huan-Yu verfasserin aut Hartanto, Heribertus Bayu verfasserin aut Kraus, Manfred verfasserin aut Worek, Malgorzata verfasserin aut Enthalten in Journal of high energy physics Berlin : Springer, 1997 2020(2020), 8 vom: 10. Aug. (DE-627)320910571 (DE-600)2027350-2 1029-8479 nnns volume:2020 year:2020 number:8 day:10 month:08 https://dx.doi.org/10.1007/JHEP08(2020)043 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2020 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.46 ASE AR 2020 2020 8 10 08
allfieldsSound	10.1007/JHEP08(2020)043 doi (DE-627)SPR040608328 (SPR)JHEP08(2020)043-e DE-627 ger DE-627 rakwb eng 530 ASE 33.46 bkl Bevilacqua, Giuseppe verfasserin aut The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation. NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213 Bi, Huan-Yu verfasserin aut Hartanto, Heribertus Bayu verfasserin aut Kraus, Manfred verfasserin aut Worek, Malgorzata verfasserin aut Enthalten in Journal of high energy physics Berlin : Springer, 1997 2020(2020), 8 vom: 10. Aug. (DE-627)320910571 (DE-600)2027350-2 1029-8479 nnns volume:2020 year:2020 number:8 day:10 month:08 https://dx.doi.org/10.1007/JHEP08(2020)043 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2014 GBV_ILN_2020 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 33.46 ASE AR 2020 2020 8 10 08
language	English
source	Enthalten in Journal of high energy physics 2020(2020), 8 vom: 10. Aug. volume:2020 year:2020 number:8 day:10 month:08
sourceStr	Enthalten in Journal of high energy physics 2020(2020), 8 vom: 10. Aug. volume:2020 year:2020 number:8 day:10 month:08
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topic_facet	NLO Computations QCD Phenomenology
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author	Bevilacqua, Giuseppe
spellingShingle	Bevilacqua, Giuseppe ddc 530 bkl 33.46 misc NLO Computations misc QCD Phenomenology The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD
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topic_title	530 ASE 33.46 bkl The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD NLO Computations (dpeaa)DE-He213 QCD Phenomenology (dpeaa)DE-He213
topic	ddc 530 bkl 33.46 misc NLO Computations misc QCD Phenomenology
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title	The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD
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title_full	The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD
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author_browse	Bevilacqua, Giuseppe Bi, Huan-Yu Hartanto, Heribertus Bayu Kraus, Manfred Worek, Malgorzata
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title_sort	simplest of them all: %$ t\overline{t}{w}^{\pm } %$ at nlo accuracy in qcd
title_auth	The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD
abstract	Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation.
abstractGer	Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation.
abstract_unstemmed	Abstract Recent measurements of the pp →%$ t\overline{t}{W}^{\pm } %$ process in multi-lepton final states, as performed by the ATLAS collaboration in the context of the Higgs boson studies in the %$ t\overline{t}H %$ channel, have shown discrepancies between theoretical predictions and experimental data. Such discrepancies have been observed both in the overall normalisation as well as in the modelling of the %$ t\overline{t}{W}^{\pm } %$ process. With the goal of understanding and resolving the modelling issues within the SM %$ t\overline{t}{W}^{\pm } %$ process we report on the state-of-the-art NLO QCD computation for this process. Specifically, we calculate higher-order corrections to the %$ {e}^{+}{\nu}_e{\mu}^{-}{\overline{\nu}}_{\mu }{e}^{+}{\nu}_eb\overline{b} %$ and %$ {e}^{-}{\overline{\nu}}_e{\mu}^{+}{\nu}_{\mu }{e}^{-}{\overline{\nu}}_eb\overline{b} %$ final state at the LHC with %$ \sqrt{s} %$ = 13 TeV. In the computation off-shell top quarks are described by Breit-Wigner propagators, furthermore, double-, single- as well as non-resonant top-quark contributions along with all interference effects are consistently incorporated at the matrix element level. Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. The impact of the top quark off-shell effects on the %$ t\overline{t}{W}^{\pm } %$ cross section is also examined by an explicit comparison to the narrow-width approximation.
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title_short	The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD
url	https://dx.doi.org/10.1007/JHEP08(2020)043
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author2	Bi, Huan-Yu Hartanto, Heribertus Bayu Kraus, Manfred Worek, Malgorzata
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doi_str	10.1007/JHEP08(2020)043
up_date	2024-07-03T17:05:33.120Z
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Results at NLO QCD accuracy are presented in the form of fiducial integrated and differential cross sections for two selected renormalisation and factorisation scale choices and three different PDF sets. 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The simplest of them all: %$ t\overline{t}{W}^{\pm } %$ at NLO accuracy in QCD

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