520 research outputs found
A Relativistic Description of Hadronic Decays of the Meson
The subject of this work is the analysis of hadronic decays of the exotic
meson in a fully relativistic formalism, and comparison with the
nonrelativistic results. The relativistic spin wave functions of mesons and
hybrids are constructed based on unitary representations of the Lorentz group.
The radial wave functions are obtained from phenomenological considerations of
the mass operator. We find that the decay channels and
are favored, in agreement with the results obtained using other models, thus
indicating some model independence of the S+P selection rules.Comment: 6 pages. Prepared for Hadron '03: 10th International Conference on
Hadron Spectroscopy, Aschaffenburg, Germany, 31 Aug - 6 Sep 2003. This
article may be found at
http://proceedings.aip.org/proceedings/confproceed/717.js
The cosmic jerk parameter in f(R) gravity
We derive the expression for the jerk parameter in gravity. We use the
Palatini variational principle and the field equations in the Einstein
conformal gauge. For the particular case , the
predicted value of the jerk parameter agrees with the SNLS SNIa and X-ray
galaxy cluster distance data but does not with the SNIa gold sample data.Comment: 8 pages; published versio
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