323 research outputs found
COMPUTABLE GENERAL EQUILIBRIUM MODELS FOR THE CENTRAL AND EASTERN EUROPEAN EU MEMBER STATES: A SURVEY
The accession of twelve Central and Eastern European countries (CEEC) to the European Union (in 2004 and 2007) has given rise to new challenges in evaluating the effects of integration, for both the old and the new member states. These issues can only be addressed in a consistent, economy-wide framework, given that the institutional and economic changes implied by the membership process produce numerous, dynamic and complex interactions between the economic agents and sectors. Applied general equilibrium offers such a framework. This paper reviews the existing computable general equilibrium (CGE) models for the Central and Eastern European EU member states.General equilibrium, EU, CEEC, integration
Description of as a system with the fixed center approximation
We study the system with an aim to describe the
resonance. The chiral unitary approach has achieved success in a description of
systems of the light hadron sector. With this method, the system in
the isospin sector , is found to be a dominant component of the resonance. Therefore, by regarding the system as a cluster,
the resonance, we evaluate the system applying the
fixed center approximation to the Faddeev equations. We construct the
unitarized amplitude using the chiral unitary approach. As a result, we find a
peak in the three-body amplitude around 1739 MeV and a width of about 227 MeV.
The effect of the width of and is also discussed. We
associate this peak to the which has a mass of MeV
and a width of MeV
, and molecules
We investigate theoretically baryon systems made of three hadrons which
contain one nucleon and one D meson, and in addition another meson, or . The systems are studied using the Fixed Center Approximation
to the Faddeev equations. The study is made assuming scattering of a or a
on a cluster, which is known to generate the ,
or the scattering of a nucleon on the cluster, which has been shown
to generate a hidden charm resonance named X(3700). We also investigate the
configuration of scattering of on the cluster, which is known to
generate the . In all cases we find bound states, with the
system, of exotic nature, more bound than the .Comment: 9 figure
A narrow quasi-bound state
The energies and widths of quasi-bound states with isospin I=1/2 are
evaluated in two methods, the fixed center approximation to the Faddeev
equation and the variational method approach to the effective one-channel
Hamiltonian. The interactions are constructed so that they dynamically
generate the (I=0, ) resonance state. We find
that the system is bound by about 250 MeV from the threshold, MeV. Its width including both the mesonic decay and the
absorption, is estimated to be about 20-40 MeV. The I=0 pair in the
system is found to form a cluster that is similar to the .Comment: 17 pages, 18 figures, 3 table
g_phi-pion-gamma coupling constant in light cone QCD sum rules
The coupling constant of g_phi-pion-gamma decay is calculated using light
cone QCD sum rules. A comparison of our result with the ones existing in the
literature is presented.Comment: 9 pages, 2 figure
A prediction of -multi- states
We present a study of the many-body interaction between a and
multi-. We use an extrapolation to SU(4) of the hidden gauge formalism,
which produced dynamically the resonances in the
interaction and in the interaction. Then let a third
particle, , , or a resonance collide with them, evaluating the
scattering amplitudes in terms of the Fixed Center Approximation of the Faddeev
equations. We find several clear resonant structures above 2800\mev in the
multibody scattering amplitudes. They would correspond to new charmed
resonances, , , and , which are not yet listed in
the PDG, which would be analogous to the , ,
, and , ,
described before as multi- and -multi- states respectively
The Bounds on the magnetic moment of the tau-neutrino via the process (e+e-)-->nunu(bar)gamma
Bounds on the anamolous magnetic moment of the tau neutrino are calculated
through the reaction (e+e-)-->nunu(bar)gamma at the neutral boson pole and in
the framework of an extended standard model, a left-right symmetric model and a
superstring-inspired model which has one extra low-energy neutral gauge boson.
The results are basedComment: 9 pages, 1 figure, 3 Table
Asymmetry Parameter of the by Analyzing the Transition Form Factors within QCD
Separating the mixture of the and states, the
transition form factors are calculated in
the three-point QCD sum rules approach. The longitudinal, transverse and total
decay widths as well as the asymmetry parameter, characterizing the
polarization of the axial and the branching ratio for these
decays are evaluated.Comment: 25 pages, 3 figures, 3 table
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