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Measurement of Angular Asymmetries in the Decays B->K*l+l-

Abstract : We study the lepton forward-backward asymmetry AFB and the longitudinal K* polarization FL, as well as an observable P2 derived from them, in the rare decays B->K*l+l-, where l+l- is either e+e- or mu+mu-, using the full sample of 471 million BBbar events collected at the Upsilon(4S) resonance with the Babar detector at the PEP-II e+e- collider. We separately fit and report results for the B+->K*+l+l- and B0->K*0l+l- final states, as well as their combination B->K*l+l-, in five disjoint dilepton mass-squared bins. An angular analysis of B+->K*+l+l- decays is presented here for the first time.
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Submitted on : Wednesday, September 2, 2015 - 11:39:34 AM
Last modification on : Friday, November 6, 2020 - 3:28:17 AM

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J. P. Lees, V. Poireau, V. Tisserand, N. Arnaud, M. Davier, et al.. Measurement of Angular Asymmetries in the Decays B->K*l+l-. Physical Review D, American Physical Society, 2016, 93, pp.052015. ⟨10.1103/PhysRevD.93.052015⟩. ⟨in2p3-01191638⟩



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