We report on a measurement of CP-violating asymmetries (ACP) in the Cabibbo-suppressed D0→π+π- and D0→K+K- decays reconstructed in a data sample corresponding to 5.9  fb-1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D*+→D0π+ to identify the flavor of the charmed meson at production and exploit CP-conserving strong cc̅ pair production in pp̅ collisions. High-statistics samples of Cabibbo-favored D0→K-π+ decays with and without a D*± tag are used to correct for instrumental effects and significantly reduce systematic uncertainties. We measure ACP(D0→π+π-)=(+0.22±0.24(stat)±0.11(syst))% and ACP(D0→K+K-)=(-0.24±0.22(stat)±0.09(syst))%, in agreement with CP conservation. These are the most precise determinations from a single experiment to date. Under the assumption of negligible direct CP violation in D0→π+π- and D0→K+K- decays, the results provide an upper limit to the CP-violating asymmetry in D0 mixing, |ACPind(D0)|<0.13% at the 90% confidence level.

T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2012). Measurement of CP-violating asymmetries in D0→π+π- and D0→K+K- decays at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85, 012009-1-012009-28 [10.1103/PhysRevD.85.012009].

Measurement of CP-violating asymmetries in D0→π+π- and D0→K+K- decays at CDF

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

Abstract

We report on a measurement of CP-violating asymmetries (ACP) in the Cabibbo-suppressed D0→π+π- and D0→K+K- decays reconstructed in a data sample corresponding to 5.9  fb-1 of integrated luminosity collected by the upgraded Collider Detector at Fermilab. We use the strong decay D*+→D0π+ to identify the flavor of the charmed meson at production and exploit CP-conserving strong cc̅ pair production in pp̅ collisions. High-statistics samples of Cabibbo-favored D0→K-π+ decays with and without a D*± tag are used to correct for instrumental effects and significantly reduce systematic uncertainties. We measure ACP(D0→π+π-)=(+0.22±0.24(stat)±0.11(syst))% and ACP(D0→K+K-)=(-0.24±0.22(stat)±0.09(syst))%, in agreement with CP conservation. These are the most precise determinations from a single experiment to date. Under the assumption of negligible direct CP violation in D0→π+π- and D0→K+K- decays, the results provide an upper limit to the CP-violating asymmetry in D0 mixing, |ACPind(D0)|<0.13% at the 90% confidence level.
2012
T. AALTONEN, B. ÁLVAREZ GONZÁLEZ, S. AMERIO, D. AMIDEI, A. ANASTASSOV, A. ANNOVI, et al. (2012). Measurement of CP-violating asymmetries in D0&#8594;&#960;+&#960;- and D0&#8594;K+K- decays at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 85, 012009-1-012009-28 [10.1103/PhysRevD.85.012009].
T. AALTONEN; B. ÁLVAREZ GONZÁLEZ; S. AMERIO; D. AMIDEI; A. ANASTASSOV; A. ANNOVI; J. ANTOS; G. APOLLINARI; J. APPEL; T. ARISAWA; A. ARTIKOV; J. ASAADI...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/122913
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