000001919 001__ 1919
000001919 005__ 20200515114136.0
000001919 037__ $$aBELLE2-CONF-PH-2020-003
000001919 041__ $$aeng
000001919 100__ $$aReem Rasheed
000001919 245__ $$aMeasurement of the $B^{0}$ lifetime using fully reconstructed hadronic decays in the 2019 Belle II dataset  
000001919 260__ $$a$$c2020-05-15
000001919 300__ $$a16
000001919 520__ $$aThis document presents the measurement of B 0 meson lifetimes using the 2019 Belle II dataset that corresponds to an integrated luminosity of $8.7 \pm 0.2 fb^{-1}$. Each candidate is fully reconstructed with hadronic decay final states on the signal side, while the rest-of-event technique allows to infer the decay vertex position on the other (tag) side. $B^{0}$ lifetime is extracted from an unbinned maximum likelihood fit to the distribution of the difference between the signal side $B^{0}$ candidate and the tag side decay times. The measured lifetime is $\tau_{B^{0}} = 1.48 \pm 0.28 \pm 0.06$ ps, where the first uncertainty is statistical and the second is systematic.
000001919 6531_ $$aB^{0} lifetime,
000001919 6531_ $$aBelle II
000001919 6531_ $$ahadronic decays
000001919 700__ $$aJerome Baudot
000001919 700__ $$aGiulio Dujany
000001919 700__ $$aSviatoslav Bilokin
000001919 700__ $$aIsabelle-Ripp Baudot
000001919 8560_ $$freem.rasheed@desy.de
000001919 8564_ $$uhttps://docs.belle2.org/record/1919/files/BELLE2-CONF-PH-2020-003.pdf