139 research outputs found
Semileptonic charmed meson decays in Universal Extra Dimension Model
Form factors parameterizing the semileptonic decay () are calculated using the frame work of
Ward Identities. These form factors are then used to calculate the physical
observables like branching ratio and helicity fractions of final state
meson in these decay modes. The analysis is then extended to the
the universal extra dimension (UED) model where the dependence of above
mentioned physical variables to the compactification radius R, the only unknown
parameter in UED model, is studied. It is shown that the helicity fractions of
are quite sensitive to the UED model especially when have muons
as the final state lepton. Therefore, these can serve as a useful tool to
establish new physics predicted by the UED model.Comment: 17 pages, 4 figure
Insights into the quark-gluon vertex from lattice QCD and meson spectroscopy
By comparing successful quark-gluon vertex interaction models with the
corresponding interaction extracted from lattice-QCD data on the quark's
propagator, we identify common qualitative features which could be important to
tune future interaction models beyond the rainbow ladder approximation.
Clearly, a quantitative comparison is conceptually not simple, but
qualitatively the results suggest that a realistic interaction should be
relatively broad with a strong support at about ~GeV and
infrared-finite
Towards flavored bound states beyond rainbows and ladders
We give a snapshot of recent progress in solving the Dyson-Schwinger equation
with a beyond rainbow-ladder ansatz for the dressed quark-gluon vertex which
includes ghost contributions. We discuss the motivations for this approach with
regard to heavy-flavored bound states and form factors and briefly describe
future steps to be taken.Comment: Contribution to the proceedings of the XXXVI Reuni\~ao de Trabalho
sobre F\'isica Nuclear no Brasil which took place in Maresias, S\~ao Paulo,
Brazil. 8 pages, 3 figures. AIP proceeding styl
Semileptonic charmed meson decays in Universal Extra Dimension Model
Form factors parameterizing the semileptonic decay () are calculated using the frame work of
Ward Identities. These form factors are then used to calculate the physical
observables like branching ratio and helicity fractions of final state
meson in these decay modes. The analysis is then extended to the
the universal extra dimension (UED) model where the dependence of above
mentioned physical variables to the compactification radius R, the only unknown
parameter in UED model, is studied. It is shown that the helicity fractions of
are quite sensitive to the UED model especially when have muons
as the final state lepton. Therefore, these can serve as a useful tool to
establish new physics predicted by the UED model.Comment: 17 pages, 4 figure
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