6533b7d0fe1ef96bd125b6cb

RESEARCH PRODUCT

A reanalysis of branching fractions of charmed mesonsD 0,D + andD s +

subject

description

We combine highly complementary information on branching fractions of charmed mesonsD0,D+ andDs+ coming from two experiments both yielding doublecharm samples. The NA 32 experiment provided exclusive branching fractions for channels with at least two charged decay products while a recent Mark III paper provides results on inclusive charm decay properties. The knowledge of channels withK0's in the former is used to recalculate the charged multiplicity distribution in the latter. We obtain 〈nch〉=2.25±0.08 forD0, 〈nch〉=1.96±0.08 forD+ and 〈nch〉=2.41±0.38 forDs+. In turn the knowledge of the charged multiplicity improves the overall normalization of exclusive branching fractions. This reanalysis yields model-independent results for charmed mesons. In particular we obtain branching fractions for 16Ds+ decay channels including $$BF(D_s^ + \to \phi \pi ^ + ) = \left( {4.4\begin{array}{*{20}c} { + 2.3} \\ { - 1.8} \\ \end{array} } \right)\% .$$ .