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.

Measurement of the Difference in CP-Violating Asymmetries in D-0 -> K+K- and D-0 -> pi(+)pi(-) Decays at CDF

INTROZZI, GIANLUCA;
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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/570449
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