We report a measurement of the indirect CP-violating asymmetries (A(Gamma)) between effective lifetimes of anticharm and charm mesons reconstructed in D-0 --> K+K- and D-0 --> pi(+)pi(-) 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*(+) --> D-0 pi(+) is used to identify the meson at production as D-0 or (D) over bar (0). We statistically subtract D-0 and (D) over bar (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 A(Gamma)(K+K- ) = (-0.19 +/- 0.15(stat) +/- 0.04(syst))% and A(Gamma)(pi(+)pi(-)) = (- 0.01 +/- 0.18(stat) +/- 0.03(syst)%. The results are consistent with the hypothesis of CP symmetry and their combination yields A(Gamma) = (- 0.12 +/- 0.12)%.

T., A., S., A., D., A., A., A., A., A., J., A., et al. (2014). Measurement of indirect CP-violation asymmetries in D0->K+K- and D0 ->pi+pi- decays at CDF. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(11) [10.1103/PhysRevD.90.111103].

Measurement of indirect CP-violation asymmetries in D0->K+K- and D0 ->pi+pi- decays at CDF

MAESTRO, PAOLO;
2014

Abstract

We report a measurement of the indirect CP-violating asymmetries (A(Gamma)) between effective lifetimes of anticharm and charm mesons reconstructed in D-0 --> K+K- and D-0 --> pi(+)pi(-) 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*(+) --> D-0 pi(+) is used to identify the meson at production as D-0 or (D) over bar (0). We statistically subtract D-0 and (D) over bar (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 A(Gamma)(K+K- ) = (-0.19 +/- 0.15(stat) +/- 0.04(syst))% and A(Gamma)(pi(+)pi(-)) = (- 0.01 +/- 0.18(stat) +/- 0.03(syst)%. The results are consistent with the hypothesis of CP symmetry and their combination yields A(Gamma) = (- 0.12 +/- 0.12)%.
T., A., S., A., D., A., A., A., A., A., J., A., et al. (2014). Measurement of indirect CP-violation asymmetries in D0->K+K- and D0 ->pi+pi- decays at CDF. PHYSICAL REVIEW. D. PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 90(11) [10.1103/PhysRevD.90.111103].
File in questo prodotto:
File Dimensione Formato  
PRD90_091101.pdf

non disponibili

Tipologia: PDF editoriale
Licenza: PUBBLICO - Pubblico con Copyright
Dimensione 344.56 kB
Formato Adobe PDF
344.56 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

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/11365/962448
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo