We present a measurement of relative partial widths and decay rate CP asymmetries in K(-)K(+) and pi(-)pi(+) decays of D(0) mesons produced in p(p) over bar collisions at root s = 1.96 TeV. We use a sample of 2x10(5) D(*+)-> D(0)pi(+) (and charge conjugate) decays with the D(0) decaying to K(-)pi(+), K(-)K(+), and pi(-)pi(+), corresponding to 123 pb(-1) of data collected by the Collider Detector at Fermilab II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed. We measure Gamma(D(0)-> K(-)K(+))/Gamma(D(0)-> K(-)pi(+)) = 0.0992 +/- 0.0011 +/- 0.0012, Gamma(D(0)->pi(-)pi(+))/Gamma(D(0)-> K(-)pi(+)) = 0.035 94 +/- 0.000 54 +/- 0.000 40, A(CP)(K(-)K(+)) = (2.0 +/- 1.2 +/- 0.6)%, and A(CP)(pi(-)pi(+)) = (1.0 +/- 1.3 +/- 0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.

D., A., T., A., T., A., M. G., A., D., A., S., A., et al. (2005). Measurement of partial widths and search for direct CP violation in D(0) meson decays to K(-)K(+) and pi(-)pi(+). PHYSICAL REVIEW LETTERS, 94(12) [10.1103/PhysRevLett.94.122001].

Measurement of partial widths and search for direct CP violation in D(0) meson decays to K(-)K(+) and pi(-)pi(+)

PAOLETTI, RICCARDO;
2005-01-01

Abstract

We present a measurement of relative partial widths and decay rate CP asymmetries in K(-)K(+) and pi(-)pi(+) decays of D(0) mesons produced in p(p) over bar collisions at root s = 1.96 TeV. We use a sample of 2x10(5) D(*+)-> D(0)pi(+) (and charge conjugate) decays with the D(0) decaying to K(-)pi(+), K(-)K(+), and pi(-)pi(+), corresponding to 123 pb(-1) of data collected by the Collider Detector at Fermilab II experiment at the Fermilab Tevatron collider. No significant direct CP violation is observed. We measure Gamma(D(0)-> K(-)K(+))/Gamma(D(0)-> K(-)pi(+)) = 0.0992 +/- 0.0011 +/- 0.0012, Gamma(D(0)->pi(-)pi(+))/Gamma(D(0)-> K(-)pi(+)) = 0.035 94 +/- 0.000 54 +/- 0.000 40, A(CP)(K(-)K(+)) = (2.0 +/- 1.2 +/- 0.6)%, and A(CP)(pi(-)pi(+)) = (1.0 +/- 1.3 +/- 0.6)%, where, in all cases, the first uncertainty is statistical and the second is systematic.
2005
D., A., T., A., T., A., M. G., A., D., A., S., A., et al. (2005). Measurement of partial widths and search for direct CP violation in D(0) meson decays to K(-)K(+) and pi(-)pi(+). PHYSICAL REVIEW LETTERS, 94(12) [10.1103/PhysRevLett.94.122001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/38947
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