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Search for Time-Dependent CP Violation in D0 → π+ππ0 Decays

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Schmelling,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Zavertyaev,  M.       
Division Prof. Dr. James A. Hinton, MPI for Nuclear Physics, Max Planck Society;

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Citation

LHCb Collaboration, Aaij, R., Abdelmotteleb, A. S. W., Abellan Beteta, C., Abudinén, F., Ackernley, T., et al. (2024). Search for Time-Dependent CP Violation in D0 → π+ππ0 Decays. Physical Review Letters, 133(10): 101803. doi:10.1103/PhysRevLett.133.101803.


Cite as: https://hdl.handle.net/21.11116/0000-000F-D210-1
Abstract
A measurement of time-dependent CP violation in D0 → π+ππ0 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 → Kπ+π0 is used as a control channel to validate the measurement procedure. The gradient of the time-dependent CP asymmetry ΔY in D0 → π+ππ0 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.