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oai:recercat.cat:2445/1314912025-12-05T16:53:24Zcom_2072_1057col_2072_478823col_2072_478917

urn:hdl:2445/131491 Observation of B0→χc0K*0 and evidence for B+→χc0K*+ Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration Física de partícules Experiments Particle physics Experiments We present the observation of the decay B 0 → χ c 0 K * 0 as well as evidence of B + → χ c 0 K * + , with an 8.9 and a 3.6 standard deviation significance, respectively, using a data sample of 454 × 10 6 Υ ( 4 S ) → B ¯¯¯ B decays collected with the BABAR detector at the PEP-II B meson factory located at the Stanford Linear Accelerator Center (SLAC). The measured branching fractions are B ( B 0 → χ c 0 K * 0 ) = ( 1.7 ± 0.3 ± 0.2 ) × 10 − 4 and B ( B + → χ c 0 K * + ) = ( 1.4 ± 0.5 ± 0.2 ) × 10 − 4 , where the first quoted errors are statistical and the second are systematic. We obtain a branching fraction upper limit of B ( B + → χ c 0 K * + ) < 2.1 × 10 − 4 at the 90% confidence level. 2019-04-05T10:09:37Z 2019-04-05T10:09:37Z 2008-11-06 2019-04-05T10:09:38Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.78.091101 Physical Review D, 2008, vol. 78, num. 9, p. 091101 https://doi.org/10.1103/PhysRevD.78.091101 (c) American Physical Society, 2008 info:eu-repo/semantics/openAccess American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)