000002328 001__ 2328
000002328 005__ 20210601105214.0
000002328 037__ $$aBELLE2-CONF-PH-2021-004
000002328 041__ $$aeng
000002328 100__ $$aFlorian Bernlochner
000002328 245__ $$aMeasurement of the time-integrated mixing probability chi_d with a semileptonic double-tagging strategy and 34.6 fb^-1 of Belle II collision data
000002328 260__ $$a$$c2021-04-06
000002328 300__ $$a12
000002328 520__ $$aWe present a first measurement of the time-integrated mixing probability chi_d using Belle II collision data corresponding to the integrated luminosity of 34.6 fb^-1. We reconstruct pairs of B mesons both decaying in semileptonic final states. Using a novel extraction methodology, we measure 0.192 +- 0.010 (stat.) +- 0.016 (syst.), which is compatible with existing indirect and direct determinations.
000002328 6531_ $$aBelle II
000002328 6531_ $$atime-integrated mixing probability
000002328 6531_ $$achi_d
000002328 6531_ $$asemileptonic decays
000002328 700__ $$aJochen Dingfelder
000002328 700__ $$aStephan Duell
000002328 700__ $$aPeter Lewis
000002328 8560_ $$fs.duell@physik.uni-bonn.de
000002328 8564_ $$uhttps://docs.belle2.org/record/2328/files/BELLE2-CONF-PH-2021-004.pdf