Search for Axion-Like Particles produced in $e^{+}{e}^{-}$ collisions at Belle II

Abstract

We present a search for the direct production of a light pseudoscalar $a$ decaying into two photons with the Belle II detector at the SuperKEKB collider. We search for the process $e^{+}{e}^{-}\to \gamma a,a\to \gamma \gamma$ in the mass range ${0.2} \,< m_a < {9.7}\,{\text{GeV/$c$}^2}$ using data corresponding to an integrated luminosity of $(445\pm 3){\text{pb}}^{-1}$. Light pseudoscalars interacting predominantly with standard model gauge bosons (so-called axion-like particles or ALPs) are frequently postulated in extensions of the standard model. We find no evidence for ALPs and set 95% confidence level upper limits on the coupling strength $g_{a\gamma \gamma }$ of ALPs to photons at the level of $10^{-3}{\text{GeV}}^{-1}$. The limits are the most restrictive to date for $0.2\,<\,m_a\,<\,1\,{\text{GeV/$c$}^2}$.

arXiv comment9 pages, 5 figures + supplemental material. Published in Physical Review Letters

References in corpus (23)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Asymptotic formulae for likelihood-based tests of new physics
• The Low-Energy Frontier of Particle Physics
• The Belle II Physics Book
• Kernel Estimation in High-Energy Physics
• Collider Probes of Axion-Like Particles
• Probing MeV to 90 GeV axion-like particles with LEP and LHC
• Revised constraints and Belle II sensitivity for visible and invisible axion-like particles
• SuperKEKB Collider
• Searching for axion-like particles with ultra-peripheral heavy-ion collisions
• A taste of dark matter: Flavour constraints on pseudoscalar mediators
• Evidence for light-by-light scattering and searches for axion-like particles in ultraperipheral PbPb collisions at $\sqrt{s_{\mathrm{NN}}}=$ 5.02 TeV
• ALPtraum: ALP production in proton beam dump experiments
• The Belle II Core Software
• Matching perturbative and Parton Shower corrections to Bhabha process at flavour factories
• Large-angle Bhabha scattering and luminosity at flavour factories
• Photoproduction of axion-like particles
• Search for Axionlike and Scalar Particles with the NA64 Experiment
• Robust cosmological constraints on axion-like particles
• Photon pair production at flavour factories with per mille accuracy
• An Improved Parton Shower algorithm in QED
• Modeling interactions of photons with pseudoscalar and vector mesons
• Measurement of the integrated luminosity of the Phase 2 data of the Belle II experiment

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• The ALP explanation to muon $(g-2)$ and its test at future Tera-$Z$ and Higgs factories
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• Data Preservation in High Energy Physics
• The LHC as an Axion-Photon Collider
• Implications of recent ${\left(g-2\right)}_{\mu }$ measurements for MeV-GeV dark sector searches
• The Forward Physics Facility at the High-Luminosity LHC
• Translating current ALP photon coupling strength bounds to the Randall-Sundrum model
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