Measurements of masses and widths of excited charm mesons D-2(*), evidence for 2 broad states and observation of D-s(+)(2317) from focus experiment

摘要

I report three new results from photoproduction experiment FOCUS on L=1 excited meson spectrDscopy: precise measurements of the masses and widths of the D-2(*+) and D-2(*0) mesons, evidence for broad states decaying to D(+)pi(-), D(0)pi(+) (the first such evidence in D(0)pi(+)), and confirmation of the recently observed D-s(+)(2317) charmed-strange state.