arXiv:1111.6515·v2·High Energy Physics — Experiment
On the interplay of direct and indirect CP violation in the charm sector
Marco Gersabeck (1)🇨🇭 · Michael Alexander (2)🇬🇧 · Silvia Borghi (2 and 3)🇬🇧 · Vladimir V Gligorov (1)🇨🇭 · Chris Parkes (3 and 1) ((1) CERN, Geneva, Switzerland, (2) School of Physics and Astronomy, University of Glasgow, Glasgow, UK, (3) School of Physics and Astronomy, University of Manchester, Manchester, UK)🇨🇭
Abstract
Charm mixing and CP violation observables are examined in the light of the recently reported evidence from LHCb for CP violation in the charm sector. If the result is confirmed as being due to direct CP violation at the 1% level, its effect will need to be taken into account in the interpretation of CP violation observables. The contributions of direct and indirect CP violation to the decay rate asymmetry difference DeltaACP and the ratios of effective lifetimes AGamma and yCP are considered here. Terms relevant to the interpretation of future high precision measurements which have been neglected in previous literature are identified.
Comments: accepted for publication in J. Phys. G