M.Morello (Fermilab),"Measurement of CP violation in the D0->pi+pi- at CDF"
→
Europe/Rome
131 (INFN Edificio C)
131
INFN Edificio C
Description
We report a measurement of the CP violating asymmetry in D0->pi+pi- decays
using approximately 215,000 decays reconstructed in about 5.94 fb-1 of CDF data.
We use the strong D*+ -> D0pi+ decay ("D* tag'') to identify
the flavor of the charmed meson at production time and exploit CP-conserving strong
cc-bar pair-production in pp-bar collisions. Higher statistic samples of
Cabibbo-favored D0 -> K-pi+ decays with and without D* tag are used to
highly suppress systematic uncertainties due to detector effects. The result,
ACP(D0->pi+pi-) = 0.22+-0.24 (stat)+-0.11 (syst) %,
is the world's most precise measurement to date and it is fully consistent with
no CP violation.
