University of Rajasthan

About: University of Rajasthan is a education organization based out in Jaipur, India. It is known for research contribution in the topics: Chemical shift & Derivative (chemistry). The organization has 15058 authors who have published 15733 publications receiving 117400 citations. The organization is also known as: Rajasthan University.

Spin alignment measurements of the K*(0)(892) and phi(1020) vector mesons in heavy ion collisions at root S-NN=200 GeV

Abstract: We present the first spin alignment measurements for the K*{sup 0}(892) and (1020) vector mesons produced at midrapidity with transverse momenta up to 5 GeV/c at {radical}s{sub NN} = 200 GeV at RHIC. The diagonal spin-density matrix elements with respect to the reaction plane in Au+Au collisions are {rho}{sub 00} = 0.32 {+-} 0.04 (stat) {+-} 0.09 (syst) for the K*{sup 0} (0.8 < p{sub T} < 5.0 GeV/c) and {rho}{sub 00} = 0.34 {+-} 0.02 (stat) {+-} 0.03 (syst) for the {phi} (0.4 < p{sub T} < 5.0 GeV/c) and are constant with transverse momentum and collision centrality. The data are consistent with the unpolarized expectation of 1/3 and thus no evidence is found for the transfer of the orbital angular momentum of the colliding system to the vector-meson spins. Spin alignments for K*{sup 0} and {phi} in Au+Au collisions were also measured with respect to the particle's production plane. The {phi} result, {rho}{sub 00} = 0.41 {+-} 0.02 (stat) {+-} 0.04 (syst), is consistent with that in p+p collisions, {rho}{sub 00} = 0.39 {+-} 0.03 (stat) {+-} 0.06 (syst), also measured in this work. The measurements thus constrain the possible size of polarization phenomena in the production dynamicsmore » of vector mesons.« less

Heat conduction and a porosity correction term for spherical and cubic particles in a simple cubic packing

Abstract: In this paper, to predict the effective thermal conductivity of two-phase systems from the value of the thermal conductivities of the constituent phases and the corresponding volume fractions, a theoretical model is developed by assuming the particles to be rigid and spherical in shape, having regular three-dimensional simple cubic geometry. In the literature there is a model in which particles are assumed to be rigid and cubic in shape and of the same geometry. A comparative study is made and it is observed that both models based upon rigid geometry produce deviations from experimental results. A modification is made to both the theoretical models by incorporating a single porosity correction term. The modified models are applied to a large number of samples having great differences in the thermal conductivities of the constituent phases. Comparisons of these models with different two-phase models have also been made in the literature. It is observed that there is close agreement between results from measured and modified models. Furthermore, the values predicted by the modified models show that, on the lower side of the volume fraction of the more highly conducting phase , the spherical particle model is better than the cubic particle model; on the other hand, for higher the cubic particle model predicts very well irrespective of the type of sample.

Socialisation of Street Children in India: A Socio-economic Profile

Abstract: This study was carried out with an aim to map the socio-economic realities of street children in Jaipur city, India. In-depth interviews were conducted in a “casual-conversation” manner with 200 street children, profiles of their background, incidence of migration, familial contacts, clothing and food, work experiences, play and entertainment, personal habits, peer interaction, attitudes toward self, family and society; and aspirations and expectations were studied. The field scenario indicated that majority of street children were boys (71%) and in 8–12 years age group. Incidence of migration was observed and 70.5% of these children lived with their families. Gambling, watching films and television; smoking and drinking, and taking drugs were common modes of entertainment and relaxation for these children. The results throw light on significant developmental concerns which emerge from the socialisation of street children in India, and draw a parallel with the findings of research studies carried out in d...

Proton-Lambda correlations in central Au+Au collisions at root s(NN)=200 GeV

Abstract: We report on p-Lambda, p-(Lambda) over bar, (p) over bar-Lambda, and (p) over bar-(Lambda) over bar correlation functions constructed in central Au-Au collisions at root s(NN) = 200 GeV by the STAR experiment at RHIC. The proton and lambda source size is inferred from the p-Lambda and (p) over bar-(Lambda) over bar correlation functions. It is found to be smaller than the pion source size also measured by the STAR experiment at smaller transverse masses, in agreement with a scenario of a strong universal collective flow. The p-(Lambda) over bar and (p) over bar-Lambda correlation functions, which are measured for the first time, exhibit a large anticorrelation. Annihilation channels and/or a negative real part of the spin-averaged scattering length must be included in the final-state interactions calculation to reproduce the measured correlation function.