Search for $CP$ violation in the phase space of $D^0\to {\pi }^{-}{\pi }^{+}{\pi }^0$ decays with the energy test

Abstract

A search for $CP$ violation in $D^0\to {\pi }^{-}{\pi }^{+}{\pi }^0$ decays is reported, using $pp$ collision data collected by the LHCb experiment from 2015 to 2018 corresponding to an integrated luminosity of 6$f{b}^{-1}$. An unbinned model-independent approach provides sensitivity to local $CP$ violation within the two-dimensional phase space of the decay. The method is validated using the Cabibbo-favoured channel $\D^0 \to \K^-π^+π^0$ and background regions of the signal mode. The results are consistent with $CP$ symmetry in this decay.

arXiv commentAll figures and tables, along with any supplementary material and additional information, are available at https://cern.ch/lhcbproject/Publications/p/LHCb-PAPER-2023-005.html (LHCb public pages). Updated 20 March 2024 to fix Figure 4 (incorrect T-value in initial version) - this update doesn't affect any other elements of the measurement or paper

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Cited by in corpus (5)

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• Measurement of the $CP$ asymmetry in $D^0\to {\pi }^{+}{\pi }^{-}{\pi }^0$ decays at Belle II