We report a measurement of the difference (Delta A(CP)) between time-integrated CP-violating asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb(-1) of integrated luminosity. The strong decay D*(+) -> D-0 pi(+) is used to identify the charm meson at production as D-0 or (D) over bar (0). We measure Delta A(CP) = [-0.62 +/- 0.21(stat) +/- 0.10(syst)]%, which differs from zero by 2.7 Gaussian standard deviations. This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions. RI song, hao/I-2782-2012; Zanetti, Anna/I-3893-2012; manca, giulia/I-9264-2012
Measurement of the Difference in CP-Violating Asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) Decays at CDF
DELL'ORSO, MAURO;DONATI, SIMONE;PUNZI, GIOVANNI;Ruffini F;
2012-01-01
Abstract
We report a measurement of the difference (Delta A(CP)) between time-integrated CP-violating asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb(-1) of integrated luminosity. The strong decay D*(+) -> D-0 pi(+) is used to identify the charm meson at production as D-0 or (D) over bar (0). We measure Delta A(CP) = [-0.62 +/- 0.21(stat) +/- 0.10(syst)]%, which differs from zero by 2.7 Gaussian standard deviations. This result supports similar evidence for CP violation in charm-quark decays obtained in proton-proton collisions. RI song, hao/I-2782-2012; Zanetti, Anna/I-3893-2012; manca, giulia/I-9264-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
