Garra Ticó, JordiGraugés Pous, EugeniBABAR Collaboration2019-04-052019-04-052009-03-191550-7998https://hdl.handle.net/2445/131668We present measurements of the branching fraction and fraction of longitudinal polarization for the decay B + → ¯¯¯¯ K * 0 K * + with a sample of ( 467 ± 5 ) × 10 6 B ¯¯¯ B pairs collected with the BABAR detector at the PEP-II asymmetric-energy e + e − collider at the SLAC National Accelerator Laboratory. We obtain the branching fraction B ( B + → ¯¯¯¯ K * 0 K * + ) = ( 1.2 ± 0.5 ± 0.1 ) × 10 − 6 with a significance of 3.7 standard deviations including systematic uncertainties. We measure the fraction of longitudinal polarization f L = 0.75 + 0.16 − 0.26 ± 0.03 . The first error quoted is statistical and the second is systematic.9 p.application/pdfeng(c) American Physical Society, 2009Física de partículesExperimentsParticle physicsExperimentsinfo:eu-repo/semantics/article5777632019-04-05info:eu-repo/semantics/openAccess