Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model

The associated production of neutral Higgs bosons with the Z 0 gauge boson ( h 0 Z 0 , H 0 Z 0 ) is investigated in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). We compute the corresponding cross section for the processes e...

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Autores: López Val, David, Solà Peracaula, Joan, Bernal, Nicolás
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2010
País:España
Recursos:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/131709
Acesso em linha:https://hdl.handle.net/2445/131709
Access Level:acceso abierto
Palavra-chave:Física de partícules
Experiments
Bosons de Higgs
Particle physics
Higgs bosons
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spelling Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet modelLópez Val, DavidSolà Peracaula, JoanBernal, NicolásFísica de partículesExperimentsBosons de HiggsParticle physicsExperimentsHiggs bosonsThe associated production of neutral Higgs bosons with the Z 0 gauge boson ( h 0 Z 0 , H 0 Z 0 ) is investigated in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). We compute the corresponding cross section for the processes e + e − → Z 0 h 0 / Z 0 H 0 at one-loop, including the full set of corrections at O ( α 3 e w ) together with the leading O ( α 4 e w ) terms, in full consistency with the available theoretical and phenomenological constraints. We find that the wave-function corrections to the external Higgs fields are the dominant source of the quantum effects, which turn out to be large and negative (e.g., δ σ / σ ∼ − 20 % / − 60 % ) in all the √ s range, and located predominantly in the region around tan  β ∼ 1 and moderate values of the parameter λ 5 (being λ 5 < 0 ). This behavior can be ultimately traced back to the enhancement potential of the triple Higgs-boson self-couplings, a trademark feature of the 2HDM with no counterpart in the Higgs sector of the minimal supersymmetric standard model. Even under this substantial depletion of the one-loop-corrected signal (which is also highly distinctive with respect to the SM expectation for e + e − → Z 0 H ), the predicted Higgs-strahlung rates comfortably reach a few tens of femtobarn, which means barely ∼ 10 3 - 10 4 events per 500     fb − 1 of integrated luminosity. Because of their great complementarity, we argue that the combined analysis of the Higgs-strahlung events ( h 0 Z 0 , H 0 Z 0 ) and the previously computed one-loop Higgs-pair production processes ( H 0 A 0 ) could be instrumental to probe the structure of the Higgs sector at future linac facilities.American Physical Society2010info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/131709Articles publicats en revistes (Física Quàntica i Astrofísica)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.1103/PhysRevD.81.113005Physical Review D, 2010, vol. D 81, num. 11, p. 113005https://doi.org/10.1103/PhysRevD.81.113005(c) American Physical Society, 2010info:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1317092026-05-27T06:46:51Z
dc.title.none.fl_str_mv Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
title Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
spellingShingle Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
López Val, David
Física de partícules
Experiments
Bosons de Higgs
Particle physics
Experiments
Higgs bosons
title_short Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
title_full Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
title_fullStr Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
title_full_unstemmed Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
title_sort Quantum effects on Higgs-strahlung events at linear colliders within the general two-Higgs-doublet model
dc.creator.none.fl_str_mv López Val, David
Solà Peracaula, Joan
Bernal, Nicolás
author López Val, David
author_facet López Val, David
Solà Peracaula, Joan
Bernal, Nicolás
author_role author
author2 Solà Peracaula, Joan
Bernal, Nicolás
author2_role author
author
dc.subject.none.fl_str_mv Física de partícules
Experiments
Bosons de Higgs
Particle physics
Experiments
Higgs bosons
topic Física de partícules
Experiments
Bosons de Higgs
Particle physics
Experiments
Higgs bosons
description The associated production of neutral Higgs bosons with the Z 0 gauge boson ( h 0 Z 0 , H 0 Z 0 ) is investigated in the context of the future linear colliders, such as the ILC and CLIC, within the general two-Higgs-doublet model (2HDM). We compute the corresponding cross section for the processes e + e − → Z 0 h 0 / Z 0 H 0 at one-loop, including the full set of corrections at O ( α 3 e w ) together with the leading O ( α 4 e w ) terms, in full consistency with the available theoretical and phenomenological constraints. We find that the wave-function corrections to the external Higgs fields are the dominant source of the quantum effects, which turn out to be large and negative (e.g., δ σ / σ ∼ − 20 % / − 60 % ) in all the √ s range, and located predominantly in the region around tan  β ∼ 1 and moderate values of the parameter λ 5 (being λ 5 < 0 ). This behavior can be ultimately traced back to the enhancement potential of the triple Higgs-boson self-couplings, a trademark feature of the 2HDM with no counterpart in the Higgs sector of the minimal supersymmetric standard model. Even under this substantial depletion of the one-loop-corrected signal (which is also highly distinctive with respect to the SM expectation for e + e − → Z 0 H ), the predicted Higgs-strahlung rates comfortably reach a few tens of femtobarn, which means barely ∼ 10 3 - 10 4 events per 500     fb − 1 of integrated luminosity. Because of their great complementarity, we argue that the combined analysis of the Higgs-strahlung events ( h 0 Z 0 , H 0 Z 0 ) and the previously computed one-loop Higgs-pair production processes ( H 0 A 0 ) could be instrumental to probe the structure of the Higgs sector at future linac facilities.
publishDate 2010
dc.date.none.fl_str_mv 2010
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/131709
url https://hdl.handle.net/2445/131709
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.81.113005
Physical Review D, 2010, vol. D 81, num. 11, p. 113005
https://doi.org/10.1103/PhysRevD.81.113005
dc.rights.none.fl_str_mv (c) American Physical Society, 2010
info:eu-repo/semantics/openAccess
rights_invalid_str_mv (c) American Physical Society, 2010
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv Articles publicats en revistes (Física Quàntica i Astrofísica)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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