Search for Dark Photons in Rare Z Boson Decays with the ATLAS Detector

Sonia Kabana; Theodota Lagouri; ATLAS Collaboration

doi:10.1103/PhysRevLett.131.251801

Search for Dark Photons in Rare Z Boson Decays with the ATLAS Detector

Título traducido de la contribución: Búsqueda de fotones oscuros en desintegraciones raras de bosones Z con el detector ATLAS

Sonia Kabana
, Theodota Lagouri
, ATLAS Collaboration

Instituto de Alta Investigación

Universidad de Tarapacá

Producción científica: Contribución a una revista › Artículo › revisión exhaustiva

4 Citas (Scopus)

Resumen

Se presenta una búsqueda de eventos con un fotón oscuro producido en asociación con un bosón de Higgs oscuro mediante desintegraciones poco frecuentes del bosón 𝑍 del modelo estándar, utilizando 139 fb⁻¹de datos de colisión protón-protón de √𝑠=13 TeV registrados por el detector ATLAS del Gran Colisionador de Hadrones. El bosón oscuro se desintegra en un par de fotones oscuros, y al menos dos de los tres fotones oscuros deben desintegrarse en un par de electrones o muones, lo que resulta en al menos dos pares de leptones con carga opuesta y el mismo sabor en el estado final. Los datos son consistentes con la predicción de fondo, y se establecen límites superiores para el acoplamiento del fotón oscuro al bosón de Higgs oscuro multiplicado por la mezcla cinética entre el fotón del modelo estándar y el fotón oscuro, 𝛼_D⁢𝜖², en el rango de masas del fotón oscuro de [5, 40] GeV, excepto para la ventana de masas ϒ [8.8, 11.1] GeV. Esta búsqueda explora un nuevo espacio de parámetros no excluido previamente por otros experimentos.

Título traducido de la contribución	Búsqueda de fotones oscuros en desintegraciones raras de bosones Z con el detector ATLAS
Idioma original	Inglés
Número de artículo	251801
Publicación	Physical Review Letters
Volumen	131
N.º	25
DOI	https://doi.org/10.1103/PhysRevLett.131.251801
Estado	Publicada - 22 dic. 2023

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@article{d55c026f407e4ed99a74bc68082a279c,

title = "Search for Dark Photons in Rare Z Boson Decays with the ATLAS Detector",

abstract = "A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the standard model 𝑍 boson is presented, using 139 fb−1 of √𝑠=13 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. The dark boson decays into a pair of dark photons, and at least two of the three dark photons must each decay into a pair of electrons or muons, resulting in at least two same-flavor opposite-charge lepton pairs in the final state. The data are found to be consistent with the background prediction, and upper limits are set on the dark photon{\textquoteright}s coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, 𝛼D⁢𝜖2, in the dark photon mass range of [5, 40] GeV except for the ϒ mass window [8.8, 11.1] GeV. This search explores new parameter space not previously excluded by other experiments.",

author = "Sonia Kabana and Theodota Lagouri and \{ATLAS Collaboration\}",

note = "Publisher Copyright: {\textcopyright} 2023 CERN, for the ATLAS Collaboration",

year = "2023",

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doi = "10.1103/PhysRevLett.131.251801",

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AU - Kabana, Sonia

AU - Lagouri, Theodota

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N2 - A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the standard model 𝑍 boson is presented, using 139 fb−1 of √𝑠=13 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. The dark boson decays into a pair of dark photons, and at least two of the three dark photons must each decay into a pair of electrons or muons, resulting in at least two same-flavor opposite-charge lepton pairs in the final state. The data are found to be consistent with the background prediction, and upper limits are set on the dark photon’s coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, 𝛼D⁢𝜖2, in the dark photon mass range of [5, 40] GeV except for the ϒ mass window [8.8, 11.1] GeV. This search explores new parameter space not previously excluded by other experiments.

AB - A search for events with a dark photon produced in association with a dark Higgs boson via rare decays of the standard model 𝑍 boson is presented, using 139 fb−1 of √𝑠=13 TeV proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider. The dark boson decays into a pair of dark photons, and at least two of the three dark photons must each decay into a pair of electrons or muons, resulting in at least two same-flavor opposite-charge lepton pairs in the final state. The data are found to be consistent with the background prediction, and upper limits are set on the dark photon’s coupling to the dark Higgs boson times the kinetic mixing between the standard model photon and the dark photon, 𝛼D⁢𝜖2, in the dark photon mass range of [5, 40] GeV except for the ϒ mass window [8.8, 11.1] GeV. This search explores new parameter space not previously excluded by other experiments.

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Search for Dark Photons in Rare Z Boson Decays with the ATLAS Detector

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