Strong decays of 2+ charm and charm-strange mesons

Inclusive semileptonic decays of charm and charmed-strange mesons

We have measured the inclusive semileptonic branching fractions of D0, D+, and D+ s mesons. For these measurements, we have used the full CLEO-c open-charm data samples, 818 pb−1 at ECM = 3.774 GeV, giving D 0D̄0 and D+D− events, and 602 pb−1 at ECM = 4.170 GeV, giving D∗± s D ∓ s events. We obtain B(D0 → Xeνe) = (6.46± 0.09± 0.11)%, B(D+ → Xeνe) = (16.13± 0.10 ± 0.29)%, and B(D+ s → Xeνe) = (6....

Charm fragmentation and excited charm and charm-strange mesons at ZEUS

Charm hadrons were produced copiously in ep collisions with a centre-of-mass energy of 318GeV at HERA providing a means to study charm hadronisation. During first phase of the HERA operation (1992-2000), the ZEUS collaboration accumulated data sample corresponding to an integrated luminosity of ∼ 120 pb. Measurements of the D, D, D and Λc production a with the HERA I data were used to determine...

Radiative weak decays of charm mesons.

We address Standard Model predictions for flavor-changing radiative transitions of the pseudoscalar charm mesons. Short-distance contributions in D radiative transitions are contrasted with those in B decays. A full analysis is presented of the c → u+ γ electromagnetic penguin amplitude with QCD radiative corrections included. Given the importance of long-range effects for the charm sector, spe...

Light Scalar Mesons in Charm Meson Decays

We present recent results on scalar light mesons based on Dalitz plot analyses of charm decays from Fermilab experiment E791. Low mass scalar mesons are found to have large contributions to the decays studied, D → Kππ and D,D s → πππ. These results demonstrate the importance of charm decays as a new environment for the study of light meson physics.

Charm Radiative Decays with Neutral Mesons