hide
Free keywords:
CP violation, Charm quark, Charmed mesons, Electroweak interaction
MPINP:
LHCb - Abteilung Hinton
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 flavor of each D0 candidate is determined from the charge of the pion produced in the D*(2010)+ → D0π+ 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) x 10−4; where the first uncertainty is statistical and the second is systematic, which is compatible with CP conservation.