Searches for LLP at Belle and Belle II

Sumitted to PubDB: 2024-06-28

Category: Talk, Visibility: Public

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Authors Ori Fogel
Date June 28, 2024
Belle II Number BELLE2-TALK-CONF-2024-079
Abstract The Belle and Belle~II experiment have collected samples of $e^+e^-$ collision data at centre-of-mass energies near the $\Upsilon(nS)$ resonances. These data have constrained kinematics and low multiplicity which allow searches for new long-lived particles in the mass range from a few MeV to 10~GeV. Belle II has searched for a long-lived scalar particle $S$ produced in $B\to KS$ decays using $189~\mathrm{fb}^{-1}$ of data. Using tau-lepton decays in a 915~fb$^{-1}$ sample, Belle has searched for a long-lived heavy neutral lepton that mixes primarily with the tau neutrino.
Conference The 14th workshop of Long lived Particle Community 2024

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