Measurement of CP asymmetries in $D^0\to hh$ decays

Abstract

The latest measurements of the individual time-integrated CP asymmetry in the Cabibbo-suppressed decays $D^0\to hh$ decays are presented. The results are based on $pp$ collision data, corresponding to an integrated luminosity of $3f{b}^{-1}$, collected with the LHCb detector at centre-of-mass energies of 7 and 8 TeV. A combination of the asymmetries using both prompt and secondary charm decays is presented $A_{CP}(K^{-}{K}^{+})=(0.04\pm 0.12(stat)\pm 0.10(syst))$; $A_{CP}({\pi }^{-}{\pi }^{+})=(0.07\pm 0.14(stat)\pm 0.11(syst))$. These are the most precise measurements from a single experiment. The result for $A_{CP}(K^{-}{K}^{+})$ is the most precise determination of a time-integrated CP asymmetry in the charm sector to date, and neither measurement shows evidence of CP asymmetry.

VIII International Workshop On Charm Physics, 5-9 September, 2016, Bologna, Italy

References in corpus (2)

• LHCb Detector Performance
• Measurement of the difference of CP-violating asymmetries in D0 -> K+K- and D0 ->pi+pi- decays at CDF