Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson

The sensitivity of the rare decays η(')→π0γγ and η'→ηγγ to signatures of a leptophobic B boson in the MeV-GeV mass range is analyzed in this work. By adding an explicit B-boson resonance exchange, η→Bγ→π0γγ, to the Standard Model contributions from vector and scalar meson exchanges, and em...

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Autores: Escribano, Rafel|||0000-0002-8534-9679, Gonzàlez-Solís, Sergi|||0000-0003-1947-5420, Royo, Emilio|||0000-0002-9776-460X
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:320678
Acceso en línea:https://ddd.uab.cat/record/320678
https://dx.doi.org/urn:doi:10.1103/PhysRevD.106.114007
Access Level:acceso abierto
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spelling Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B bosonEscribano, Rafel|||0000-0002-8534-9679Gonzàlez-Solís, Sergi|||0000-0003-1947-5420Royo, Emilio|||0000-0002-9776-460XThe sensitivity of the rare decays η(')→π0γγ and η'→ηγγ to signatures of a leptophobic B boson in the MeV-GeV mass range is analyzed in this work. By adding an explicit B-boson resonance exchange, η→Bγ→π0γγ, to the Standard Model contributions from vector and scalar meson exchanges, and employing experimental data for the associated branching ratios, it allows us to improve the current constraints on the B-boson mass mB and coupling to Standard Model particles αB. From these constraints and the analysis of the available experimental γγ invariant mass distribution, we show that a B-boson signature in the resonant mass range mπ0≲mB≲mη is strongly suppressed and would be very difficult to experimentally identify, assuming that the leptophobic B boson only decays to Standard Model particles. In contrast, the limits outside this mass window are less stringent and the corresponding t- and u-channel signatures may still be observable in the data, as it occurs with the nonresonant Standard Model ρ, ω and φ meson exchanges. In addition, we make use of experimental data from the η'→π0γγ and η'→ηγγ decays to explore larger B-boson masses. Our results are relevant for the B-boson search programs at existing and forthcoming light-meson facilities, such as KLOE(-II) and Jefferson Lab Eta Factory experiments. 22022-01-0120222022-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/320678https://dx.doi.org/urn:doi:10.1103/PhysRevD.106.114007reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 824093Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2020-112965-GB-I00open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.https://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:3206782026-06-06T12:50:31Z
dc.title.none.fl_str_mv Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
title Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
spellingShingle Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
Escribano, Rafel|||0000-0002-8534-9679
title_short Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
title_full Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
title_fullStr Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
title_full_unstemmed Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
title_sort Sensitivity of the η (') →π0γγ and η' →ηγγ decays to a sub-GeV leptophobic U (1)B boson
dc.creator.none.fl_str_mv Escribano, Rafel|||0000-0002-8534-9679
Gonzàlez-Solís, Sergi|||0000-0003-1947-5420
Royo, Emilio|||0000-0002-9776-460X
author Escribano, Rafel|||0000-0002-8534-9679
author_facet Escribano, Rafel|||0000-0002-8534-9679
Gonzàlez-Solís, Sergi|||0000-0003-1947-5420
Royo, Emilio|||0000-0002-9776-460X
author_role author
author2 Gonzàlez-Solís, Sergi|||0000-0003-1947-5420
Royo, Emilio|||0000-0002-9776-460X
author2_role author
author
description The sensitivity of the rare decays η(')→π0γγ and η'→ηγγ to signatures of a leptophobic B boson in the MeV-GeV mass range is analyzed in this work. By adding an explicit B-boson resonance exchange, η→Bγ→π0γγ, to the Standard Model contributions from vector and scalar meson exchanges, and employing experimental data for the associated branching ratios, it allows us to improve the current constraints on the B-boson mass mB and coupling to Standard Model particles αB. From these constraints and the analysis of the available experimental γγ invariant mass distribution, we show that a B-boson signature in the resonant mass range mπ0≲mB≲mη is strongly suppressed and would be very difficult to experimentally identify, assuming that the leptophobic B boson only decays to Standard Model particles. In contrast, the limits outside this mass window are less stringent and the corresponding t- and u-channel signatures may still be observable in the data, as it occurs with the nonresonant Standard Model ρ, ω and φ meson exchanges. In addition, we make use of experimental data from the η'→π0γγ and η'→ηγγ decays to explore larger B-boson masses. Our results are relevant for the B-boson search programs at existing and forthcoming light-meson facilities, such as KLOE(-II) and Jefferson Lab Eta Factory experiments.
publishDate 2022
dc.date.none.fl_str_mv 2
2022-01-01
2022
2022-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/320678
https://dx.doi.org/urn:doi:10.1103/PhysRevD.106.114007
url https://ddd.uab.cat/record/320678
https://dx.doi.org/urn:doi:10.1103/PhysRevD.106.114007
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 824093
Agencia Estatal de Investigación https://doi.org/10.13039/501100011033 PID2020-112965-GB-I00
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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