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Title: Measurement of angular asymmetries in the decays B →k∗+
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Leptons (Física nuclear)
Partícules (Física nuclear)
Leptons (Nuclear physics)
Particles (Nuclear physics)
Issue Date: 28-Mar-2016
Publisher: American Physical Society
Abstract: We study the lepton forward-backward asymmetry A F B and the longitudinal K ∗ polarization F L , as well as an observable P 2 derived from them, in the rare decays B → K ∗ ℓ + ℓ − , where ℓ + ℓ − is either e + e − or μ + μ − , using the full sample of 471 million B ¯ B events collected at the Υ ( 4 S ) resonance with the BABAR, detector at the PEP-II e + e − collider. We separately fit and report results for the K * 0 ( 892 ) ℓ + ℓ − and K * + ( 892 ) ℓ + ℓ − final states, as well as their combination 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.
Note: Reproducció del document publicat a:
It is part of: Physical Review D, 2016, vol. 93, num. 5, p. 52015-1-52015-16
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ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Institut de Ciències del Cosmos (ICCUB))
Articles publicats en revistes (Física Quàntica i Astrofísica)

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