Conveners
Belle II: (All talks 12+3)
- José Francisco Zurita (IFIC - Univ. of Valencia and CSIC (ES))
- Louie Dartmoor Corpe (CERN)
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Zeren Simon Wang (National Tsing Hua University)10/11/2021, 14:00
We study charged lepton flavor violation associated with a light leptophilic axion-like particle (ALP), $X$, at the $B$-factory experiment Belle II. We focus on production of the ALP in the tau decays $\tau \to X l$ with $l=e,\mu$, followed by its decay via $X\to l^- l^+$. The ALP can be either promptly decaying or long-lived. We perform Monte-Carlo simulations, recasting a prompt search at...
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Julian Günther10/11/2021, 14:15
At Belle II, large and clean samples of $\tau$ leptons are produced and may decay to sterile neutrinos. For the relevant mass range, such sterile neutrinos are typically long-lived, leading to displaced-vertex (DV) signatures at colliders. Here, we study a DV search of sterile neutrinos at Belle II in the framework of the sterile-neutrino-extended Standard Model Effective Field Theory...
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Vazha Loladze (Florida State University)10/11/2021, 14:30
The QCD axion is a well-motivated addition to the standard model to solve the strong $CP$ problem. If the axion acquires mass dominantly from a hidden sector, it can be as heavy as $O(1)$ GeV, and the decay constant can be as low as $O(100)$ GeV without running into the axion quality problem. We propose new search strategies for such heavy QCD axions at the Belle II experiment, where the...
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Ruth Schäfer10/11/2021, 14:45
At collider experiments, long-lived particles may decay displaced within the detector or leave the detector as missing energy, depending on their lifetime and on the detector geometry. To exploit this complementarity, we propose a new search strategy for invisible ALPs in $B^+\to K^+ a$ decays at Belle II. We compare our predictions with existing and future searches for displaced vertices from...
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