R-parity Violation in Neutralino Decays at an e \gamma Collider

At an e-\gamma collider, a selectron \tilde{e}_{L,R} may be produced in association with a (lightest) neutralino \tilde{\chi}_1. Decay of the selectron may be expected to yield a final state with an electron and another \tilde{\chi}_1. If R-parity is violated, these two neutralinos will decay, giving rise to distinctive signatures, which are identified and studied.Comment: LaTeX, 17 pages, 4 figure

Top off the unparticle

The existence of an exactly scale invariant sector possessing a non-trivial infrared fixed point at a higher energy scale and its possible communication with the Standard Model particles through a heavy messenger sector has been shown to lead to curious unparticle effects. We demonstrate that top physics at the Tevatron can already constrain such theories. We also consider possible improvements at the LHC and delineate some striking signatures.Comment: 5 page

Re-examining Economic Growth-Environment Relationship: Evidence from High-, Medium- And Low-Income Countries

There is said to be an inverted U shaped relationship between economic growth and the environment, named environmental Kuznets curve (EKC). But why such relationship exists and what are the mechanisms by which economic development improves environment are not well known. Studies are generally based on reduced form single equation model of this relationship, which could not explain much insight into its underlying causes. To overcome these limitations, we develop a structural model for analysing economic growth-environment linkages. Using panel data from a cross-section of countries widely dispersed on economic growth scale, this study finds that the scale of economic activities deteriorates environmental quality during the earlier stage of economic growth, whereas structural economic changes and abatement activities offset this effect and thus improves environmental quality during the later stage. It is also found that these effects differ widely across high-, medium- and low-income countries and, therefore, a global aggregation is certainly a misspecification of the EKC relationship.

A botanical approach to managing obesity

metabolic syndrome in check like obesity. There are few drugs in the market to ameliorate or prevent obesity but there are the costs, efficacy and side effects to consider. For centuries people across the countries have been using natural products and plant based dietary supplements for weight control. The current review will consists of one South Asian herb, Garcinia cambogia and one Chinese herb, Magnolia officinalis

Constraining Anomaly Mediated Supersymmetry Breaking Framework via Ongoing Muon g-2 Experiment at Brookhaven

The ongoing high precision E821 Brookhaven National Laboratory experiment on muon g-2 is promising to probe a theory involving supersymmetry. We have studied the constraints on the minimal Anomaly Mediated Supersymmetry Breaking (AMSB) model using the current data of muon g-2 from Brookhaven. A scenario of seeing no deviation from the Standard Model is also considered, within a $2\sigma$ limit of the combined error from the Standard Model result and the Brookhaven predicted uncertainty level. The resulting constraint is found to be complementary to what one obtains from $b \to s+ \gamma$ bounds within the AMSB scenario, since only a definite sign of $\mu$ is effectively probed via $b \to s+ \gamma$. A few relevant generic features of the model are also described for disallowed regions of parameter space.Comment: 24 pages, LaTeX, 5 postscript figures. A few references added. Final version to appear in Phys. Rev.