1,063 research outputs found
D-mesons and charmonium states in hot isospin asymmetric strange hadronic matter
We study the properties of and mesons in hot isospin asymmetric
strange hadronic matter, arising due to their interactions with the hadrons in
the hyperonic medium. The interactions of and mesons with these
light hadrons are derived by generalizing the chiral SU(3) model used for the
study of hyperonic matter to SU(4). We also study the mass modifications of the
charmonium states , and in the isospin
asymmetric strange hadronic matter at finite temperatures and investigate the
possibility of the decay of the charmonium states into pairs in the
hot hadronic medium. The mass modifications of these charmonium states arise
due to their interaction with the gluon condensates of QCD, simulated by a
scalar dilaton field introduced to incorporate the broken scale invariance of
QCD within the effective chiral model. We also compute the partial decay widths
of the charmonium states to the pairs in the hadronic medium. The
strong dependence on density of the in-medium properties of the ,
and the charmonium states, as well as the partial decay widths of charmonium
states to pairs, found in the present investigation, will be of
direct relevance in observables like open charm enhancement as well as
suppression in the compressed baryonic matter (CBM) experiments at the future
Facility for Antiproton and Ion Research, GSI, where the baryonic matter at
high densities is planned to be produced.Comment: Accepted for publication in Eur.Phys.Jour. A. Substantially more work
has been done and the manuscript has been modified with addition of a new
section and new figure
Demand elasticities in international trade : are they really low?
The authors analyze the U.S. demandfor Bangladeshi imports for products restricted under the Multifiber Arrangement. Because Bangladesh is only a small supplier of these products and Latin American and Asian countries can supply close substitutes, the authors expected a high elasticity of demand for Bangladeshi imports, and they found consistently high estimates based on statistically significant coefficients. Their finding accords with trade theorists'prejudice that small countries can essentially behave as price takers, but conflicts with the empirical literature view that demand elasticities are low, rarely exceeding 3 and generally between 1 and 2. The authors'analysis differs from the existing literature in three ways: they derive a set of estimation equations from an explicit, utility-maximization model and use the estimated parameters of the utility function to obtain the Marshallian own-price and cross-price elasticities as well as the income elasticity of demand; they take explicit account of U.S. imports from competitors of Bangladesh, relying directly on competitors'prices; and they use highly disaggregated data that make the unit value of exports a better proxy for price than using aggregated export data commonly used in this literature. The authors outline their theoretical model for deriving their estimated equations in Section 1; preliminarily determine who Bangladesh's competitors are in Section 2; and estimate the demand equation derived in Section 1, and derive the price and income elasticities facing Bangladesh in Section 3.Environmental Economics&Policies,Economic Theory&Research,Markets and Market Access,Payment Systems&Infrastructure,Consumption,Economic Theory&Research,Environmental Economics&Policies,Access to Markets,Markets and Market Access,Consumption
Kaon and antikaon optical potentials in isospin asymmetric hyperonic matter
The medium modifications of the energies of kaons and antikaons in isospin
asymmetric hyperonic matter are investigated using a chiral SU(3) model. The
isospin dependent medium effects, are important for asymmetric heavy ion
collision experiments, as well as relevant for the neutron star phenomenology
as the bulk matter in the interior of the neutron star is highly isospin
asymmetric. The effects of hyperons on the medium modifications of the kaons
and antikaons in the strange hadronic matter are investigated in the present
work and are seen to be appreciable for hadronic matter with large strangeness
fractions. The study of the K-mesons in the asymmetric strange hadronic matter
can be especially relevant for the compressed strange baryonic matter which can
result from asymmetric heavy ion collision experiments in the future
accelerator facility FAIR at GSI.Comment: 18 pages, 12 figure
D mesons and charmonium states in asymmetric nuclear matter at finite temperatures
We investigate the in-medium masses of and mesons in the
isospin-asymmetric nuclear matter at finite temperatures arising due to the
interactions with the nucleons, the scalar isoscalar meson , and the
scalar iso-vector meson within a SU(4) model. The in-medium masses of
and the excited charmonium states ( and ) are
also calculated in the hot isospin asymmetric nuclear matter in the present
investigation. These mass modifications arise due to the interaction of the
charmonium states with the gluon condensates of QCD, simulated by a scalar
dilaton field introduced to incorporate the broken scale invariance of QCD
within the effective chiral model. The change in the mass of in the
nuclear matter with the density is seen to be rather small, as has been shown
in the literature by using various approaches, whereas, the masses of the
excited states of charmonium ( and ) are seen to have
considerable drop at high densities. The present study of the in-medium masses
of () mesons as well as of the charmonium states will be of
relevance for the observables from the compressed baryonic matter, like the
production and collective flow of the () mesons, resulting from the
asymmetric heavy ion collision experiments planned at the future facility of
the FAIR, GSI. The mass modifications of and mesons as well as of
the charmonium states in hot nuclear medium can modify the decay of the
charmonium states () to pairs in the hot
dense hadronic matter. The small attractive potentials observed for the
mesons may lead to formation of the mesic nuclei.Comment: 61 pages, 19 figues, to be published in Phys. Rev.
Increasing distillable key rate from bound entangled states by using local filtration
We show the enhancement of distillable key rate for quantum key
distribution(QKD), by local filtering, for several bound entangled states.
Through our work it becomes evident that the local filtration operations, while
transforming one bound entangled state to another, have the potential to
increase the utility of the new state for QKD. We demonstrate three examples of
`one way distillable key rate' enhancement by local filtering and in this
process, discover new bound entangled states which are key distillable.Comment: Final version minor change
Preparation and evaluation of mucoadhesive microspheres of repaglinide for treatment of diabetes mellitus type II
Type 2 diabetes mellitus (T2DM) is the most common form of diabetes constituting 90% of the diabetic population. The number of patients with diabetes in India is currently around 40.9 million and is expected to rise to 101 million by 2030.Majority of the conventional formulations available have some drawbacks and less bioavailability, to overcome their deficiency an attempt was made to formulate mucoadhesive of Repaglinide for the treatment of Diabetes mellitus type II ,Prepared formulations were subjected for different evaluation parameters like Particle Size Analysis, Production Yield, Bulk Density, Tapped Density and Compressibility Index, Swelling Index, Mucoadhesivity study, Entrapment efficiency, Differential Scanning calorimeter and in vitro drug release study. Best formulation was chosen who passed all the evaluation parameters
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