We study the lepton forward-backward asymmetry AFB and the longitudinal K0 polarization FL, as well as an observable P2 derived from them, in the rare decays B → K0lþl−, where lþl− is either eþe− or μþμ−, using the full sample of 471 million BB ̄ events collected at the Υð4SÞ resonance with the BABAR, detector at the PEP-II eþe− collider. We separately fit and report results for the K00ð892Þlþl− and K0þð892Þlþl− final states, as well as their combination K0lþl−, in five disjoint dilepton mass-squared bins. An angular analysis of Bþ → K0þlþl− decays is presented here for the first time.
Measurement of angular asymmetries in the decays B →k∗+
BIANCHI, Fabrizio;DE MORI, FRANCESCA;GAMBA, Diego;
2016-01-01
Abstract
We study the lepton forward-backward asymmetry AFB and the longitudinal K0 polarization FL, as well as an observable P2 derived from them, in the rare decays B → K0lþl−, where lþl− is either eþe− or μþμ−, using the full sample of 471 million BB ̄ events collected at the Υð4SÞ resonance with the BABAR, detector at the PEP-II eþe− collider. We separately fit and report results for the K00ð892Þlþl− and K0þð892Þlþl− final states, as well as their combination K0lþl−, in five disjoint dilepton mass-squared bins. An angular analysis of Bþ → K0þlþl− decays is presented here for the first time.File in questo prodotto:
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