Two-body Decays Of Charmed Mesons Research Articles

Ds+--> pi + eta and pi + eta ' decays.

From a perspective in which the dynamical contribution of hadrons is manifested, Cabibbo-angle-favored two-body decays of charm mesons into final states involving η or η' are studied in consistency with the other charm meson decays

Two-body decays of charm mesons and the role of exotic mesons.

Two-body decays of charm mesons (except for decays into the final states involving [eta] or [eta][prime]) are studied from a perspective in which dynamical contributions of hadrons are explicitly taken into account. All the observed values of branching ratios for the two-body decays of charm mesons are reproduced well. In particular, a solution to the well-known puzzle, [Gamma]([ital D][sup 0][r arrow][ital K][sup +][ital K[minus]])/[Gamma]([ital D][sup 0][r arrow][pi][sup +][pi][sup [minus]])[congruent]2--3, is presented. Contributions of exotic ([ital QQ])([ital [bar Q][bar Q]]) mesons can explain the large violation of the charm counterpart of the [vert bar][Delta][ital I][vert bar]=1/2 rule in consistency with the small violation of the [vert bar][Delta][ital I][vert bar]=1/2 rule in the [ital K][r arrow][pi][pi] decays.

Analysis of two-body decays of charm mesons using the quark-diagram scheme: Addendum on hairpin diagrams.

We further develop our previous work (Phys. Rev. D 36, 137 (1987)). We incorporate in this addendum quark-diagram amplitudes of the hairpin graphs.

Analysis of two-body decays of charm mesons using the quark-diagram scheme.

Two-body decays of charm mesons are analyzed in the quark-diagram scheme. Effects of SU(3) breaking and final-state interactions are included in the formulation. Various theoretical models are reviewed and tested. In this scheme, the experimental observation of ${D}^{0}$\ensuremath{\rightarrow}K\ifmmode\bar\else\textasciimacron\fi{} $^{0}\ensuremath{\varphi}$ gives a clear signal of the W-exchange diagram. The difference in the lifetimes of ${D}^{+}$, ${D}^{0}$, and ${F}^{+}$ is studied in terms of two-body decays.

Quark-diagram analysis of two-body charm decays.

Two-body decays of charm mesons are analyzed in the quark-diagram formulation, including effects of SU(3) breaking and final-state interactions. Interesting future experiments are also pointed out.Received 13 February 1986DOI:https://doi.org/10.1103/PhysRevLett.56.1655©1986 American Physical Society