Search for time-dependent CP violation in D⁰ → π⁺ π^- π⁰ decays

2024/05/10 by LHCb collaboration, R. Aaij, A. S. W. Abdelmotteleb +1067 · 1 voice
Physics and Astronomy · #hep-ex

paper · pdf · doi:10.1103/physrevlett.133.101803

arxiv published 2024/05/10 · arxiv updated 2024/09/09

Abstract

A measurement of time-dependent CP violation in D⁰ → π⁺ π^- π⁰ decays using a pp collision data sample collected by the LHCb experiment in 2012 and from 2015 to 2018, corresponding to an integrated luminosity of 7.7 fb^-1, is presented. The initial flavour of each D⁰ candidate is determined from the charge of the pion produced in the D^*(2010)⁺ → D⁰ π⁺ decay. The decay D⁰ → K^- π⁺ π⁰ is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry, ΔY, in D⁰ → π⁺ π^- π⁰ decays is measured to be ΔY = (-1.3 ± 6.3 ± 2.4) × 10^-4, where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.

Discussions

• Search for time-dependent CP violation in D⁰→π⁺π⁻π⁰ decays arxiv.org/abs/2405.06556 - - The gradient of the time-dependent CP asymmetry is measured to be (−1.3±6.3±2.4)×10⁻⁴, which is compatible with [bsky, 0 points, 0 comments]

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