000004400 001__ 4400
000004400 005__ 20240628102224.0
000004400 037__ $$aBELLE2-TALK-CONF-2024-079
000004400 041__ $$aeng
000004400 100__ $$aOri Fogel
000004400 245__ $$aSearches for LLP at Belle and Belle II 
000004400 260__ $$aThe 14th workshop of Long lived Particle Community 2024 $$c2024-06-28
000004400 300__ $$a31
000004400 520__ $$aThe 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.
000004400 8560_ $$fisraelorif@mail.tau.ac.il
000004400 8564_ $$uhttps://docs.belle2.org/record/4400/files/BELLE2-TALK-CONF-2024-079.pdf