Published in:
Physical Review D 82,11 (2010)
Link to original published article:
http://dx.doi.org/10.1103/PhysRevD.82.112006
Abstract
We report the first determination of the relative strong-phase difference between D-0 -> K-S,L(0) K+K- and (D) over bar (0) -> K-S,L(0) K+K-. In addition, we present updated measurements of the relative strong-phase difference between D-0 -> K-S,L(0) pi(+)pi(-) and (D) over bar (0) -> K-S,L(0) pi(+)pi(-). Both measurements exploit the quantum coherence between a pair of D-0 and (D) over bar (0) mesons produced from psi(3770) decays. The strong-phase differences measured are important for determining the Cabibbo-Kobayashi-Maskawa angle gamma/phi(3) in B- -> K- (D) over tilde (0) decays, where (D) over tilde (0) is a D-0 or (D) over bar (0) meson decaying to K(S)(0)h(+)h(-) (h = pi, K), in a manner independent of the model assumed to describe the D-0 -> K(S)(0)h(+)h(-) decay. Using our results, the uncertainty in gamma/phi(3) due to the error on the strong-phase difference is expected to be between 1.7 degrees and 3.9 degrees for an analysis using B- -> K- (D) over tilde (0), (D) over tilde (0) -> K-S(0) pi(+)pi(-) decays, and between 3.2 degrees and 3.9 degrees for an analysis based on B- -> K- -> (D) over tilde (0), (D) over tilde (0) -> K-S(0) K+K- decays. A measurement is also presented of the CP-odd fraction, F-, of the decay D-0 -> K-S(0) K+K- in the region of the phi -> K+K- resonance. We find that in a region within 0.01 GeV2/c(4) of the nominal phi mass squared F- > 0.91 at the 90% confidence level.
Date of this Version
December 2010