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

MORELLO, MICHAEL JOSEPH;
2012

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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11384/38439
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 111
  • ???jsp.display-item.citation.isi??? 81
social impact