D/Sub s/ Production Data from Mark III

摘要

Preliminary results on D/sub s/ decays from the Mark III at SPEAR are presented. The data were taken at a e sup + e sup - center of mass energy of sqrt s = 4.14 GeV with a total integrated luminosity of 6.3 +- 0.46 pb. The decay e sup + e sup - -> D/sub s/D/sub s/*, D/sub s/ -> phi pi is observed, yielding a D/sub s/ mass of 1973 +- 4 +- 4 MeV/c sup 2 and a D/sub s/* mass of 2110.8 +- 1.9 +- 3.2 MeV/c sup 2 with a rate of sigma(e sup + e sup - -> D/sub s/sup sup + -/D/sub s/*/sup -+/, D/sub s/*/sup -+/ -> gamma D/sub s/sup -+/ . B(D/sub s/ sup + -> phi pi /sup +-/) = 36 +- 7 +- 13 pb. There is evidence for two other modes, D/sub s/sup +-/ -> K* sup 0 K/sup +-/ and D/sub s/sup +-/ -> K/sub s/ sup 0 K/sup +-/, which are observed with rates of sigma(e sup + e sup - -> D/sub s/D/sub s/*) . B(D/sub s/ sup + -> K* sup 0 K/sup +-/) = 31 +- 16 +- 11 pb and sigma(e sup + e sup - -> D/sub s/D/sub s/*) . B(D/sub s/sup +-/ -> K/sub s/ sup 0 K/sup +-) = 16 +- 3 +- 5 pb. (ERA citation 12:021512)