We report a measurement of the difference (ΔACP) between time-integrated CP-violating asymmetries in D0→K+K- and D0→π+π- 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*+→D0π+ is used to identify the charm meson at production as D0 or D̅ 0. We measure ΔACP=[-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.

T. AALTONEN, V. M. ABAZOV, B. ABBOTT, M. ABOLINS, B. S. ACHARYA, M. ADAMS, et al. (2012). Measurement of the Difference in CP-Violating Asymmetries in D0→K+K- and D0→π+π- Decays at CDF. PHYSICAL REVIEW LETTERS, 109, 111801-1-111801 [10.1103/PhysRevLett.109.111801].

Measurement of the Difference in CP-Violating Asymmetries in D0→K+K- and D0→π+π- Decays at CDF

BRIGLIADORI, LUCA;CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MAZZANTI, PAOLO;MOGGI, NICCOLO';MUSSINI, MANUEL;RIMONDI, FRANCO;ZUCCHELLI, STEFANO;
2012

Abstract

We report a measurement of the difference (ΔACP) between time-integrated CP-violating asymmetries in D0→K+K- and D0→π+π- 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*+→D0π+ is used to identify the charm meson at production as D0 or D̅ 0. We measure ΔACP=[-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.
2012
T. AALTONEN, V. M. ABAZOV, B. ABBOTT, M. ABOLINS, B. S. ACHARYA, M. ADAMS, et al. (2012). Measurement of the Difference in CP-Violating Asymmetries in D0→K+K- and D0→π+π- Decays at CDF. PHYSICAL REVIEW LETTERS, 109, 111801-1-111801 [10.1103/PhysRevLett.109.111801].
T. AALTONEN; V. M. ABAZOV; B. ABBOTT; M. ABOLINS; B. S. ACHARYA; M. ADAMS; T. ADAMS; J. ADELMAN; E. AGUILO; G. D. ALEXEEV; G. ALKHAZOV; A. ALTON; B. A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/128158
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