Search for mixing-induced CP violation using partial reconstruction of B¯0→D*+Xℓ-ν¯ℓ and kaon tagging

doi:10.1103/PhysRevD.93.032001

Title: Search for mixing-induced $C P$ violation using partial reconstruction of ${\bar{B}}^{0} \to D^{* +} X ℓ^{-} {\bar{ν}}_{ℓ}$ and kaon tagging

Journal Article · Mon Jun 20 00:00:00 EDT 2016 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.93.032001· OSTI ID:1259231

J. P. Lees

We describe in detail a previously published measurement of CP violation in B⁰-B¯⁰ oscillations, based on an integrated luminosity of 425.7 fb^-1 collected by the BABAR experiment at the PEPII collider. We apply a novel technique to a sample of about 6 million B¯⁰→D*⁺ℓ^-ν_ℓ¯ decays selected with partial reconstruction of the D*+ meson. The charged lepton identifies the flavor of one B meson at its decay time, the flavor of the other B is determined by kaon tagging. We determine a CP violating asymmetry ACP=(N(B0B0)-N(B¯⁰B¯⁰))/(N(B⁰B⁰)+N(B¯⁰B¯⁰))=(0.06±0.17^+0.38_-0.32)% corresponding to Δ_CP=1-|q/p|=(0.29±0.84^+1.88_-1.61)×10^-3. This measurement is consistent and competitive with those obtained at the B factories with dilepton events.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Contributing Organization:: BABAR Collaboration

DOE Contract Number:: AC02-76SF00515

OSTI ID:: 1259231

Report Number(s):: SLAC-PUB-16291; arXiv:1506.00234

Journal Information:: Physical Review D, Vol. 93; ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

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