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

J. P. Lees et al. (The BABAR Collaboration)
Phys. Rev. D 93, 032001 – Published 8 February 2016

Abstract

We describe in detail a previously published measurement of CP violation in B0-B¯0 oscillations, based on an integrated luminosity of 425.7fb1 collected by the BABAR experiment at the PEPII collider. We apply a novel technique to a sample of about 6 million B¯0D*+ν¯ 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±0.170.32+0.38)% corresponding to ΔCP=1|q/p|=(0.29±0.841.61+1.88)×103. This measurement is consistent and competitive with those obtained at the B factories with dilepton events.

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  • Received 8 June 2015

DOI:https://doi.org/10.1103/PhysRevD.93.032001

© 2016 American Physical Society

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Vol. 93, Iss. 3 — 1 February 2016

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