84 research outputs found
Natural connection with totally skew-symmetric torsion on almost contact manifolds with B-metric
A natural connection with totally skew-symmetric torsion on almost contact
manifolds with B-metric is constructed. The class of these manifolds, where the
considered connection exists, is determined. Some curvature properties for this
connection, when the corresponding curvature tensor has the properties of the
curvature tensor for the Levi-Civita connection and the torsion tensor is
parallel, are obtained.Comment: 17 page
Absolute Branching Fraction Measurements of Exclusive D^0 Semileptonic Decays
With the first data sample collected by the CLEO-c detector at the psi(3770)
resonance we have studied four exclusive semileptonic decays of the D0 meson.
Our results include the first observation and absolute branching fraction
measurement for D0 --> rho- e+ nu_e and improved measurements of the absolute
branching fractions for D0 decays to K- e+ nu_e, pi- e+ nu_e, and K*- e+ nu_e.Comment: 9 pages postscript,also available through
http://www.lns.cornell.edu/public/CLNS/2005/, submitted to PR
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