000002061 001__ 2061
000002061 005__ 20200811062948.0
000002061 037__ $$aBELLE2-CONF-PH-2020-006
000002061 041__ $$aeng
000002061 100__ $$aThe Belle II Collaboration
000002061 245__ $$aRediscovery of $B \to \phi K^{(*)}$ decays and measurement of the longitudinal polarization fraction $f_L$ in $B \to \phi K^{*}$ decays using the Summer 2020 Belle II dataset
000002061 260__ $$a$$c2020-07-31
000002061 300__ $$a19
000002061 520__ $$aWe utilize a sample of 34.6\invfb, collected by the Belle II experiment at the SuperKEKB asymmetric energy \epem\ collider, to search for the $\Bp \to \phi \Kp$, $\Bp \to \phi \Kstarp$, $\Bz \to \phi \KS$, and $\Bz \to \phi \Kstarz$ decays. Charmless hadronic \B\ decays represent an important part of the Belle II physics program, and are an ideal benchmark to test the detector capabilities in terms of tracking efficiency, charged particle identification, vertexing, and advanced analysis techniques. Each channel is observed with a significance that exceeds 5 standard deviations, and we obtain measurements of their branching ratios that are in good agreement with the world averages. For the $B \to \phi \Kstar$ modes, we also perform a measurement of the longitudinal polarization fraction $f_L$. 
000002061 6531_ $$aCharmless B decays
000002061 6531_ $$aB -> VV polarization 
000002061 6531_ $$amultidimensional ML fit
000002061 8560_ $$falessandro.gaz@desy.de
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/BELLE2-CONF-PH-2020-006.pdf
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure1.pdf$$yfigure 1
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure2.pdf$$yfigure 2
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure3.pdf$$yfigure 3
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure4.pdf$$yfigure 4
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure5.pdf$$yfigure 5
000002061 8564_ $$uhttps://docs.belle2.org/record/2061/files/Figure6.pdf$$yfigure 6