Unitarity constraints on the stabilized Randall-Sundrum scenario

Recently proposed stabilization mechanism of the Randall-Sundrum metric gives rise to a scalar radion, which couples universally to matter with a weak interaction ($\simeq 1$ TeV) scale. Demanding that gauge boson scattering as described by the effective low enerrgy theory be unitary upto a given scale leads to significant constraints on the mass of such a radion.Comment: 10 page Latex 2e file including 4 postscript figures. Accepted in Journal of Physics

Development and validation of Women’s Empowerment in Migration Index (WEMI)

There is little evidence on the association between women’s migration, empowerment, and well-being, driven in part due to difficulty in measuring empowerment in the migration context. To better understand these linkages, we developed a Women’s Empowerment in Migration Index (WEMI) and validated it with survey of 1019 returnee female migrants in Bangladesh, who had returned after working internationally, mostly from countries in West Asia. By incorporating indicators of subjective well-being from migration literature into measures of empowerment, our paper advances research over earlier assessments of women’s experiences in the migration process beyond seemingly objective indicators, such as income, health, and economic welfare. We find that 14% of all migrant women in our sample could be classified as being empowered. Lack of membership in groups, restricted mobility, and lack of asset ownership are the largest contributors to migrant women’s disempowerment in our sample. We find that WEMI is strongly correlated with other measures of well-being, including mental health and livelihood-efficacy. Women with higher empowerment scores are also less likely to experience discriminatory labor practices and unsafe work conditions. With broad applicability to migrants from low- and middle-income countries, WEMI can be used as a tool, helping to identify sources of disempowerment, and enabling stakeholders to develop interventions targeting the welfare of women migrant workers

CP violation in the decay mode B→πγγB\to \pi \gamma \gamma

Within the framework of Standard Model, the exclusive decay mode $B\to \pi \gamma \gamma$ is studied. Although the usual short distance contribution is small compared to the similar $B\to K\gamma\gamma$ mode, the process offers the possibility of studying the CP violation, a feature absent in the $B \to K$ counterpart.Comment: 11 page latex file including 2 ps figures. Typos corrected, minor changes. To appear in PR

Development of origin–destination matrices using mobile phone call data

In this research, we propose a methodology to develop OD matrices using mobile phone Call Detail Records (CDR) and limited traffic counts. CDR, which consist of time stamped tower locations with caller IDs, are analyzed first and trips occurring within certain time windows are used to generate tower-to-tower transient OD matrices for different time periods. These are then associated with corresponding nodes of the traffic network and converted to node-to-node transient OD matrices. The actual OD matrices are derived by scaling up these node-to-node transient OD matrices. An optimization based approach, in conjunction with a microscopic traffic simulation platform, is used to determine the scaling factors that result best matches with the observed traffic counts. The methodology is demonstrated using CDR from 2.87 million users of Dhaka, Bangladesh over a month and traffic counts from 13 key locations over 3 days of that month. The applicability of the methodology is supported by a validation study

CP violation at colliders

The prospects of experimental detection of $CP$ violation at $e^+e^-$ and $pp/p\overline{p}$ colliders are reviewed. After a general discussion on the quantities which can measure $CP$ violation and on the implications of the $CPT$ theorem, various possibilities of measuring $CP$ violation arising outside the standard model are taken up. $CP$ violation in leptonic processes, especially polarization effects in $e^+e^-\rightarrow l^+l^-$ are discussed next. $CP$ violation in $t\overline{t}$ and $W^+W^-$ production and decay is also described. (Based on talk presented at the WHEPP3, Madras, January 1994).Comment: 20 pages, latex, no figures (only revision is the comment that the article is based on a talk presented at WHEPP3, Madras, January 1994

Dijet resonances, widths and all that

The search for heavy resonances in the dijet channel is part of the on-going physics programme, both at the Tevatron and at the LHC. Lower limits have been placed on the masses of dijet resonances predicted in a wide variety of models. However, across experiments, the search strategy assumes that the effect of the new particles is well-approximated by on-shell production and subsequent decay into a pair of jets. We examine the impact of off-shell effects on such searches, particularly for strongly interacting resonances.Comment: Version published in JHE

Controles alternativos de podridões pós-colheita em manga.

O presente trabalho teve como objetivo avaliar a eficiência de algumas medidas de controles alternativos no combate dessas deteriorações , assim como minimizar ou eliminar o emprego de agrotóxicos nos tratamentos pós-colheita para preservar a qualidade mercadológica da manga, a fim de satisfazer às exigências dos mercados consumidores

Structures of tribenzylmethanol and 1,2,3-triphenyl-2-propanol

The tribenzylmethanol molecule, (PhCH2)3COH, has approximate threefold symmetry in the solid state. The hydroxyl H atom is disordered unequally over three orientations and is not involved in hydrogen bonding. The 1,2,3-triphenyl-2-propanol molecule, Ph(PhCH2)2COH, crystallizes with two molecules per asymmetric unit which differ slightly in conformation. In one of the molecules the hydroxyl H atom is disordered equally over two sites, whereas in the other molecule there is no disorder. As in the tribenzylmethanol molecule, there is no intermolecular O--H...O hydrogen bonding, presumably because of the steric bulk of the molecules and their packing which prevents the close approach of the O atoms of adjacent molecules

TeV-scale electron Compton scattering in the Randall-Sundrum scenario

The spin-2 graviton excitations in the Randall-Sundrum gravity model provides a t-channel contribution to electron Compton scattering which competes favourably with the standard QED contributions. The phenomenological implications of these contributions to the unpolarized and polarized cross-sections are evaluated.Comment: 11 pages, 5 figure