We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K− and D0→π+π− decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7~fb−1 of integrated luminosity. The strong-interaction decay D∗+→D0π+ is used to identify the meson at production as D0 or D⎯⎯⎯0. We statistically subtract D0 and D⎯⎯⎯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K−)=(−0.19±0.15(stat)±0.04(syst))% and AΓ(π+π−)=(−0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(−0.12±0.12)%.

T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2014). Measurement of indirect CP-violating asymmetries in D0→K+K− and D0→π+π− decays at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90, 111103-1-111103-8 [10.1103/PhysRevD.90.111103].

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

BRIGLIADORI, LUCA;CASTRO, ANDREA;MOGGI, NICCOLO';MUSSINI, MANUEL;ZUCCHELLI, STEFANO
2014

Abstract

We report a measurement of the indirect CP-violating asymmetries (AΓ) between effective lifetimes of anticharm and charm mesons reconstructed in D0→K+K− and D0→π+π− decays. We use the full data set of proton-antiproton collisions collected by the Collider Detector at Fermilab experiment and corresponding to 9.7~fb−1 of integrated luminosity. The strong-interaction decay D∗+→D0π+ is used to identify the meson at production as D0 or D⎯⎯⎯0. We statistically subtract D0 and D⎯⎯⎯0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AΓ(K+K−)=(−0.19±0.15(stat)±0.04(syst))% and AΓ(π+π−)=(−0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AΓ=(−0.12±0.12)%.
2014
T. Aaltonen, S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, et al. (2014). Measurement of indirect CP-violating asymmetries in D0→K+K− and D0→π+π− decays at CDF. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90, 111103-1-111103-8 [10.1103/PhysRevD.90.111103].
T. Aaltonen;S. Amerio;D. Amidei;A. Anastassov;A. Annovi;J. Antos;G. Apollinari;J. A. Appel;T. Arisawa;A. Artikov;J. Asaadi;W. Ashmanskas;B. Auerbach;A...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/414767
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