The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019.
Search for a Dark Photon and an Invisible Dark Higgs Boson in 𝜇+𝜇− and Missing Energy Final States with the Belle II Experiment
Bianchi, F.;Destefanis, M.;Maggiora, M.;Marcello, S.;Spataro, S.;
2023-01-01
Abstract
The dark photon A′ and the dark Higgs boson h′ are hypothetical particles predicted in many dark sector models. We search for the simultaneous production of A′ and h′ in the dark Higgsstrahlung process e+e-→A′h′ with A′→μ+μ- and h′ invisible in electron-positron collisions at a center-of-mass energy of 10.58 GeV in data collected by the Belle II experiment in 2019.File in questo prodotto:
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PhysRevLett.130.071804.pdf
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