Abstract: The time-integrated CP asymmetry in the decay D 0→ K S 0K S 0is measured using 3 fb −1of proton-proton collision data collected by the LHCb experiment at centre-of-mass energies of 7 and 8 TeV. The flavour of the D 0meson is determined by use of the decay D *+→ D 0π +and its charge conjugate mode. The result is A CP=−0.029±0.052±0.022, where the first uncertainty is statistical and the second systematic. The result is consistent with Standard Model expectations and improves the uncertainty with respect to the only previous measurement of this quantity by more than a factor of three.
All Science Journal Classification (ASJC) codes
- Física nuclear y de alta energía