March 28, 2022 Master Thesis Open Access

Weidemann, Lucas

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{
  "abstract": "<p>Axion-Like-Particles (ALPs) are a well motivated extension to the Standard Model. They are light, pseudoscalar particles which are dominantly interacting with Standard Model gauge bosons. As a result ALPs can be produced in a flavor-changing neutral current transition by its coupling to W bosons. Subsequently, the ALP dominantly decays into two photons, which makes the decay of a charged B meson to a charged K meson and an axion, which subsequently decays to two photons, a promising process for measuring the coupling to W bosons. Such decays can be studied at e+ e&minus; colliders like the Belle II experiment. In this thesis a simulation-based sensitivity study of this process is performed by reconstructing the B meson and examining the invariant di-photon mass distribution. The study is performed with ALPs in mass range 0.1-4.6 GeV and zero lifetime. The expected limits are comparable to the results of the BaBar Collaboration, who conducted a similar search.</p>", 
  "author": [
    {
      "family": "Weidemann, Lucas"
    }
  ], 
  "id": "22192", 
  "issued": {
    "date-parts": [
      [
        2022, 
        3, 
        28
      ]
    ]
  }, 
  "language": "eng", 
  "title": "Simulation-based Sensitivity Study of short-lived Axion-like Particles in B Meson Decays at the Belle II Experiment", 
  "type": "thesis"
}