Measurement of angular asymmetries in the decays B → K[superscript *]ℓ[superscript +]ℓ[superscript −]
Name
PhysRevD.93.052015.pdf
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Author(s)
Lees, J. P.
Poireau, V.
Tisserand, V.
Grauges, E.
Palano, A.
Eigen, G.
Stugu, B.
Brown, D. N.
Kerth, L. T.
Kolomensky, Yu. G.
Date Issued
March 2016
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P., V. Poireau, V. Tisserand, E. Grauges, A. Palano, G. Eigen, B. Stugu, et al. “Measurement of Angular Asymmetries in the Decays B → K[superscript *]ℓ[superscript +]ℓ[superscript −].” Phys. Rev. D 93, no. 5 (March 28, 2016). © 2016 American Physical Society
Version
Final published version
Abstract
We study the lepton forward-backward asymmetry A[subscript FB] and the longitudinal K[superscript *] polarization F[subscript L], as well as an observable P[subscript 2] derived from them, in the rare decays B → K[superscript *]ℓ[superscript +]ℓ[superscript -], where ℓ[superscript +]ℓ[superscript -] is either e[superscript +]e[superscript -] or μ[superscript +]μ[superscript -], using the full sample of 471 million B[bar over B] events collected at the ϒ(4S) resonance with the BABAR, detector at the PEP-II e[superscript +]e[superscript -] collider. We separately fit and report results for the K[superscript *0](892)ℓ[superscript +]ℓ[superscript -] and K[superscript *+](892)ℓ[superscript +]ℓ[superscript -] final states, as well as their combination K[superscript *]ℓ[superscript +]ℓ[superscript -], in five disjoint dilepton mass-squared bins. An angular analysis of B[superscript +] → K[superscript *+]ℓ[superscript +]ℓ[superscript -] decays is presented here for the first time.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.93.052015
