The Generalized Counting Rule and Oscillatory Scaling

We have studied the energy dependence of the $pp$ elastic scattering data and the pion-photoproduction data at 90$^\circ$ c.m. angle in light of the new generalized counting rule derived for exclusive processes. We show that by including the helicity flipping amplitudes (with energy dependence given by the generalized counting rule) and their interference with the Landshoff amplitude, we are able to reproduce the energy dependence of all cross-section and spin-correlation (A$_{NN}$) data available above the resonance region. The pion-photoproduction data can also be described by this approach, but in this case data with much finer energy spacing is needed to confirm the oscillations about the scaling behavior.Comment: 5 pages, 4 figs, submitted to PRC rapid com

Determinants Of the Prevalence of Diarrhoea in Adolescents Attending School: A Case Study of an Indian Village School

In developing countries, including India, diarrhoea is a leading killer throughout the age pyramid. However, most of the medical literature on the determinants of diarrhoea focuses only on young children or the elderly, with health policy mainly targeting the former. Thus, the present article attempts to contribute to a better understanding of the determinants of diarrhoea in adolescents -- the understudied population. The paper develops a model using the medical literature, refines it to fit an Indian village context and tests the hypotheses identified through administering a questionnaire to 114 adolescents in an Indian village school. Results confirm the well known importance of household sanitation. In addition, the contribution of the present study is to assert that access to school toilets and usage of school toilets are also crucial. Furthermore, usage of toilets at school varies as a function of gender and the existence of a toilet in the student's household. Finally, the installation of toilets in schools is not enough, sustainable financial models must be found to maintain toilets and induce students to use them

Signature of strong atom-cavity interaction on critical coupling

We study a critically coupled cavity doped with resonant atoms with metamaterial slabs as mirrors. We show how resonant atom-cavity interaction can lead to a splitting of the critical coupling dip. The results are explained in terms of the frequency and lifetime splitting of the coupled system.Comment: 8 pages, 5 figure

Study of a pair of coupled continuum equations modeling surface growth

In this communication we introduce a pair of coupled continuum equations to model overlayer growth with evaporation-accretion due to thermal or mechanical agitations of the substrate. We gain insight into the dynamics of growth via one-loop perturbative techniques. This allows us to analyze our numerical data. We conclude that there is a crossover behaviour from a roughening regime to a very long-time, large length scale smoothening regime.Comment: 21 pages, 13 figures. Submitted to J. Phys.: Condens. Matte

Theory of Primary Photoexcitations in Donor-Acceptor Copolymers

We present a generic theory of primary photoexcitations in low band gap donor-acceptor conjugated copolymers. Because of the combined effects of strong electron correlations and broken symmetry, there is considerable mixing between a charge-transfer exciton and an energetically proximate triplet-triplet state with an overall spin singlet. The triplet-triplet state, optically forbidden in homopolymers, is allowed in donor-acceptor copolymers. For an intermediate difference in electron affinities of the donor and the acceptor, the triplet-triplet state can have stronger oscillator strength than the charge-transfer exciton. We discuss the possibility of intramolecular singlet fission from the triplet-triplet state, and how such fission can be detected experimentally.Comment: 6 pages, 4 figures, 4 pages of Supplemental Material including 4 figure

Minimal SUGRA Model and Collider Signals

The SUSY signals in the dominant stau-neutralino coannihilation region at a 500(800) GeV linear collider are investigated. The region is consistent with the WMAP measurement of the cold dark matter relic density as well as all other current experimental bounds within the mSUGRA framework. The signals are characterized by an existence of very low-energy tau leptons in the final state due to small mass difference between stau_1 and chi_1 (5-15 GeV). We study the accuracy of the mass difference measurement with a 1^deg active mask to reduce a huge SM two-photon background.Comment: 4 pages, 3 figures, Talk presented at ICHEP04, Aug.16-22, Beijing, China, Numerical typos in Table 5 and 6 are corrected, no changes in figures and in other numerical result