Data samples corresponding to the isospin-violating decay $D_s^{*+}\to D_s^+ \pi^0$ and the decays $D_s^{*+}\to D_s^+\gamma$, $D^{*0}\to D^0\pi^0$ and $D^{*0}\to D^0\gamma$ are reconstructed using ...90.4 ${\rm fb}^{-1}$ of data recorded by the BaBar detector at the PEP-II asymmetric-energy $e^+e^-$ collider. The following branching ratios are extracted: $\Gamma(D_s^{*+}\to D_s^+ \pi^0)/\Gamma(D_s^{*+}\to D_s^+\gamma) = 0.062\pm0.005 ({\rm stat.})\pm0.006 ({\rm syst.})$ and $\Gamma(D^{*0}\to D^0\pi^0)/\Gamma(D^{*0}\to D^0\gamma) = 1.74\pm0.02 ({\rm stat.})\pm0.13 ({\rm syst.})$. Both measurements represent significant improvements over present world averages.
Nucl.Instrum.Meth. A417 (1998) 311-324 A photomultiplier setup for precise relative CsI(Tl) crystal light yield and
uniformity measurements is described. It is used for wrapping material studies
to ...optimize the uniformity and the yield of the light output of 36 cm long
crystals. The uniformity is an important property in high energy photon
calorimetry. Results of an optimization of photodiode coupling to crystals, the
influence of temperature and radiation damage to light and photoelectron yield
are also presented.
Studies of hominid fossils have frequently reported that one of their outstanding characteristics is their heavily worn teeth. Many skeletal remains of modern man also show this condition of dental ...attrition, which is probably related to certain cultural activities. The varieties of foods consumed by primitive man and the specialized tool functions of the teeth have left significant marks in the form of worn occlusal surfaces over the dental arches. This paper discusses some of the functions of the teeth indicated by these marks and suggests that tooth wear should be studied carefully in order to gain significant information about the activities of past populations.
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