Details

Autor(en) / Beteiligte

• Aaltonen, T.
• /Helsinki Inst. of Phys
• Alvarez Gonzalez, B.
• /Oviedo U. /Cantabria Inst. of Phys
• Amerio, S.
• /INFN, Padua
• Amidei, D.
• /Michigan U.
• Anastassov, A.
• /Northwestern U. /Fermilab
• Annovi, A.
• /Frascati
• Antos, J.
• /Comenius U.
• Apollinari, G.
• /Fermilab
• Appel, J.A.
• Arisawa, T.
• /Waseda U.
• Artikov, A.
• /Dubna, JINR /Texas A-M

Titel

Measurement of the difference of CP--violating asymmetries in $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays at CDF

Ist Teil von

• Physical review letters, 2012-07, Vol.109 (11)

Ort / Verlag

United States

Erscheinungsjahr

2012

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report a measurement of the difference (D/Acp) between time-integrated-violating asymmetries in D{sup 0} K{sup +}K{sup -} and D{sup 0} {pi}{sup +}{pi}{sup -} decays reconstructed in the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab, corresponding to 9.7 fb{sup -1} of integrated luminosity. The strong decay D*{sup +} D{sup 0}{pi}{sup +} is used to identify the charm meson at production as D{sup 0} or ['D]{sup 0}. We measure D/Acp = (-0.62 0.21 /stat 0.10 /syst)%, which differs from zero by 2.7 Gaussian standard deviations. This result supports similar evidence for violation in charm-quark obtained in proton-proton collisions.