Interference effects in the H (→γγ)+2jets channel at the LHC

We compute the interference between the resonant process pp→H(→γγ)+2jets and the corresponding continuum background at leading order in QCD. For the Higgs signal, we include gluon fusion (GF) and vector boson fusion (VBF) production channels, while for the background we consider all tree-level contr...

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Autor principal: de Florian, Daniel Enrique
Publicado: 2015
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Coradeschi
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Coradeschi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling paper:paper_15507998_v92_n1_p_Coradeschi2023-06-08T16:22:56Z Interference effects in the H (→γγ)+2jets channel at the LHC de Florian, Daniel Enrique We compute the interference between the resonant process pp→H(→γγ)+2jets and the corresponding continuum background at leading order in QCD. For the Higgs signal, we include gluon fusion (GF) and vector boson fusion (VBF) production channels, while for the background we consider all tree-level contributions, including pure EW effects (O(αQED4)) and QCD contributions (O(αQED2αs2)), plus the loop-induced gluon-initiated process. After convolution with the experimental mass resolution, the main effect of the interference is to shift the position of the mass peak, as in the inclusive GF case studied previously. The apparent mass shift is small in magnitude but strongly dependent on the Higgs width, potentially allowing for a measurement of, or bound on, the width itself. In the H(→γγ)+2jets channel, the VBF and GF contributions generate shifts of opposite signs which largely cancel, depending on the sets of cuts used, to as little as 5 MeV (toward a lower Higgs mass). The small magnitude of the shift makes this channel a good reference mass for measuring the inclusive mass shift of around 60 MeV in the Standard Model. © 2015 American Physical Society. Fil:De Florian, D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Coradeschi http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Coradeschi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description We compute the interference between the resonant process pp→H(→γγ)+2jets and the corresponding continuum background at leading order in QCD. For the Higgs signal, we include gluon fusion (GF) and vector boson fusion (VBF) production channels, while for the background we consider all tree-level contributions, including pure EW effects (O(αQED4)) and QCD contributions (O(αQED2αs2)), plus the loop-induced gluon-initiated process. After convolution with the experimental mass resolution, the main effect of the interference is to shift the position of the mass peak, as in the inclusive GF case studied previously. The apparent mass shift is small in magnitude but strongly dependent on the Higgs width, potentially allowing for a measurement of, or bound on, the width itself. In the H(→γγ)+2jets channel, the VBF and GF contributions generate shifts of opposite signs which largely cancel, depending on the sets of cuts used, to as little as 5 MeV (toward a lower Higgs mass). The small magnitude of the shift makes this channel a good reference mass for measuring the inclusive mass shift of around 60 MeV in the Standard Model. © 2015 American Physical Society.
author de Florian, Daniel Enrique
spellingShingle de Florian, Daniel Enrique
Interference effects in the H (→γγ)+2jets channel at the LHC
author_facet de Florian, Daniel Enrique
author_sort de Florian, Daniel Enrique
title Interference effects in the H (→γγ)+2jets channel at the LHC
title_short Interference effects in the H (→γγ)+2jets channel at the LHC
title_full Interference effects in the H (→γγ)+2jets channel at the LHC
title_fullStr Interference effects in the H (→γγ)+2jets channel at the LHC
title_full_unstemmed Interference effects in the H (→γγ)+2jets channel at the LHC
title_sort interference effects in the h (→γγ)+2jets channel at the lhc
publishDate 2015
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15507998_v92_n1_p_Coradeschi
http://hdl.handle.net/20.500.12110/paper_15507998_v92_n1_p_Coradeschi
work_keys_str_mv AT defloriandanielenrique interferenceeffectsinthehng2jetschannelatthelhc
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