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∗+ ell+ ell-, where ell+ell- is either e+e- or μ+μ-, using the full sample of 471 million BB-events collected at the (4S) resonance with the BABAR, detector at the PEP-II e+e- collider. We separately fit and report results for the K∗0(892)+ and K∗+(892)+ final states, as well as their combination K∗+, in five disjoint dilepton mass-squared bins. An angular analysis of B+→K∗+ell+ell- decays is presented here for the first time.

Measurement of angular asymmetries in the decays B →K∗+ ell+ ell-

Pilloni A.;
2016-01-01

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∗+ ell+ ell-, where ell+ell- is either e+e- or μ+μ-, using the full sample of 471 million BB-events collected at the (4S) resonance with the BABAR, detector at the PEP-II e+e- collider. We separately fit and report results for the K∗0(892)+ and K∗+(892)+ final states, as well as their combination K∗+, in five disjoint dilepton mass-squared bins. An angular analysis of B+→K∗+ell+ell- decays is presented here for the first time.
2016
Inglese
American Physical Society
93
5
052015
052030
16
Internazionale
Esperti anonimi
info:eu-repo/semantics/article
Lees, J. P.; Poireau, V.; Tisserand, V.; Grauges, E.; Palano, A.; Eigen, G.; Stugu, B.; Brown, D. N.; Kerth, L. T.; Kolomensky, Yu. G.; Lee, M. J.; Ly...espandi
14.a Contributo in Rivista::14.a.1 Articolo su rivista
289
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11570/3208724
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