Part I. A Exclusive Semileptonic Decay of the Positive D Meson. Part II. Cleo Silicon Vertex Detector Research and Development
Abstract
Part I. We have studied the exclusive semileptonic decay mode D^+ to | K^0 e^+nu_{e} in the Fermilab photoproduction experiment E691. We find the ratio of branching ratios B(D^+ to | K^0 e^+nu_{e })/B(D^+ to K^-pi^+ pi^+) to be (0.66 +/- 0.09 +/- 0.14), corresponding to a D ^+ to | K^0 e^+nu _{e} branching ratio of (6.1 +/- 0.9 +/- 1.6)%. Combining this result with our measurement of the D^+ lifetime, we find Gamma(D^+ to | K^0 e^+nu_{e }) = (5.6 +/- 0.8 +/- 1.5) {cdot } 10^{10} s^{-1} . We also find, using ne E691 averages, the ratio of decay rates Gamma(D to K^* enu)/Gamma (D to Kenu) to be (0.55 +/- 0.14). Part II. The overall design of the CLEO Silicon Vertex Detector (SVD) and the motivation for its construction is discussed. The operation and noise characteristics of the CAMEX and JAMEX preamplifier chips and the design and operation of the silicon detector wafers are described. Measurements of the various detector capacitances relevant to the readout noise are also presented.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1994
- Bibcode:
- 1994PhDT.......211S
- Keywords:
-
- D MESON;
- Physics: Elementary Particles and High Energy