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Measurement of indirect CP-violating asymmetries in D0?K+K- and D0?p+p- decays at CDF

Abstract: We report a measurement of the indirect CP-violating asymmetries (AG) between effective lifetimes of anticharm and charm mesons reconstructed in D0?K+K- and D0?p+p- 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*+?D0p+ is used to identify the meson at production as D0 or ¯D0. We statistically subtract D0 and ¯D0 mesons originating from b-hadron decays and measure the yield asymmetry between anticharm and charm decays as a function of decay time. We measure AG(K+K-)=(-0.19±0.15(stat)±0.04(syst))% and AG(p+p-)=(-0.01±0.18(stat)±0.03(syst))%. The results are consistent with the hypothesis of CP symmetry and their combination yields AG=(-0.12±0.12)%.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Fuente: Phys. Rev. D, Vol. 90, Num. 11, Pag. 111103 (2014)

Editorial: American Physical Society

 Fecha de publicación: 01/12/2014

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1103/PhysRevD.90.111103

ISSN: 1550-7998,1550-2368,2470-0010,2470-0029

 Proyecto español: FPA2014-55295-C3-1-R ; FPA 2011-28694-C02-01

Url de la publicación: https://doi.org/10.1103/PhysRevD.90.111103

Autoría

AALTONEN, TIMO ANTERO

BRUNO CASAL LARAÑA

FRANCISCO JAVIER CUEVAS MAESTRO

JOSE ENRIQUE PALENCIA CORTEZON