4,232 research outputs found
Heavy-to-light form factors in the quark model with heavy propagators
We calculate the heavy-to-light form factors in the relativistic quark model
with heavy infrapropagators. Their q^2-dependence in the physical region is
defined by two parameters: the "infrared" parameter \nu characterizing the
infrared behavior of the heavy quark and the mass difference of the heavy meson
and heavy quark E=m_H-M_Q. It is found that the values of the D\to K(K^*) and
D\to \pi(\rho) form factors at q^2=0 are in excellent agreement with the
available experimental data and other approaches whereas these values for B\to
\pi(\rho) transitions are found to be larger than those of several other
models. The obtained form factors are used to calculate the widths of the
semileptonic decays of B and D mesons. The comparison of our results with the
available experimental data and other approaches is givenComment: 15 pages, 3 eps figures. New references are added, corrected some
typos. To appear in Few-Body System
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In situ lunar heat flow experiment using the LUNAR-A penetrator
An in situ lunar heat flow measurement is planned using the Japanese Lunar-A penetrators. The temperature gradient of the regolith is expected to be obtained within 12% error
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Derivation of globally averaged lunar heat flow from the local heat flow values and the Thorium distribution at the surface: expected improvement by the LUNAR-A Mission
The relationship between the Th abundance and the heat flow data of the Apollo sites and the LUANR-A sites, where the Th concentrations are in the wide range from 1 ppm to 6 ppm, will allow for a more precise estimation of the averaged heat flow value
K -> pi pi and a light scalar meson
We explore the Delta-I= 1/2 rule and epsilon'/epsilon in K -> pi pi
transitions using a Dyson-Schwinger equation model. Exploiting the feature that
QCD penguin operators direct K^0_S transitions through 0^{++} intermediate
states, we find an explanation of the enhancement of I=0 K -> pi pi transitions
in the contribution of a light sigma-meson. This mechanism also affects
epsilon'/epsilon.Comment: 7 pages, REVTE
Lattice Boltzmann simulation of liquid-gas flows through solid bodies in a square duct
ArticleMathematics and computers in simulation. 72(2-6): 264-269 (2006)journal articl
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Thermal in situ measurements in the Lunar Regolith using the LUNAR-A penetrators: an outline of data reduction methods
For determining the lunar heat flow two parameters need to be measured: The thermal gradient and the thermal conductivity of the regolith. Methods for inferring these quantities from in situ measurements using the LUNAR-A penetrators will be presented
Kaon electromagnetic production: constraints set by new data
The CLAS data on the photo-production of K+ off the proton are utilised to
study reaction mechanism of the process in frame of the isobaric approach. The
missing D13 resonance is shown to be important for successful description of
the data in the whole kinematical region. Constructed models provide
satisfactory predictions for the process.Comment: 4 pages, 4 figures, contribution to the VIII International Conference
on Hypernuclear & Strange Particle Physics, Jefferson Lab, Virginia, U.S.A.,
October 14-18, 200
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