1.

Measurements of branching fractions of leptonic and hadronic D[sub]s[sup]+ meson decays and extraction of the D[sub]s[sup]+ meson decay constant

Most precise measurement of the branching fractions of leptonic D_s+ decays and the D_s+ meson decay constant. The latter is found to be in agreement with the most precise lattice QCD calculation. No evidence for D_s+ -) e+nu_e decays is found and the most stringent upper limit of B(D_s+ -) e+nu_e) is set. The the absolute branching fractions of hadronic decays to K-K+pi+, K0K+, and etapi+, are in agreement with the measurements performed by CLEO.

COBISS.SI-ID: 27099175

2.

Measurement of the Branching Fraction Br(Lambda_c+ -) p K- pi+)

First model-independent measurement of the absolute branching fraction of the decay Lambda_c+ -) p K- pi+, which represents a fivefold improvement in precision over previous model-dependent determinations. The hadronic decay Lambda_c+ -) p K- pi+ is the reference mode for the measurements of branching fractions of the Lambda_c+ baryon to any other final state. In addition, this is the most common decay mode in studies where a Lambda_c+ baryon is included in the final state of the decay chain, such as the exclusive and inclusive decay rate measurements of b-flavored mesons and baryons or the measurements of fragmentation fractions of charm and bottom quarks.