15 research outputs found

    Gravitational Collapse in Higher Dimensional Husain Space-Time

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    We investigate exact solution in higher dimensional Husain model for a null fluid source with pressure pp and density ρ\rho are related by the following relations (i) p=kρp=k\rho, (ii) p=kρB(v)ραp=k\rho-\frac{B(v)}{\rho^{\alpha}} (variable modified Chaplygin) and (iii) p=kραp=k\rho^{\alpha} (polytropic). We have studied the nature of singularity in gravitational collapse for the above equations of state and also for different choices of the of the parameters kk and BB namely, (i) k=0k=0, B=B= constant (generalized Chaplygin), (ii) B=B= constant (modified Chaplygin). It is found that the nature of singularity is independent of these choices of different equation of state except for variable Chaplygin model. Choices of various parameters are shown in tabular form. Finally, matching of Szekeres model with exterior Husain space-time is done.Comment: 12 latex pages, No figure, RevTex styl

    The Physics of the B Factories

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    The BaBar detector: Upgrades, operation and performance

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    Contains fulltext : 121729.pdf (preprint version ) (Open Access
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