Indiana University

About: Indiana University is a education organization based out in Bloomington, Indiana, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 64480 authors who have published 150058 publications receiving 6392902 citations. The organization is also known as: Indiana University system & indiana.edu.

Signals for Lorentz violation in electrodynamics

Abstract: An investigation is performed of the Lorentz-violating electrodynamics extracted from the renormalizable sector of the general Lorentz- and CPT-violating standard-model extension. Among the unconventional properties of radiation arising from Lorentz violation is birefringence of the vacuum. Limits on the dispersion of light produced by galactic and extragalactic objects provide bounds of $3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}16}$ on certain coefficients for Lorentz violation in the photon sector. The comparative spectral polarimetry of light from cosmologically distant sources yields stringent constraints of $2\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}32}.$ All remaining coefficients in the photon sector are measurable in high-sensitivity tests involving cavity-stabilized oscillators. Experimental configurations in Earth- and space-based laboratories are considered that involve optical or microwave cavities and that could be implemented using existing technology.

Disappearance of back-to-back high-pT Hadron correlations in central Au + Au collisions at √SNN = 200 GeV

Abstract: Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudorapidity range and full azimuth in Au+Au and p+p collisions at roots(NN)=200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes previously observed in high-energy collisions. A strong back-to-back correlation exists for p+p and peripheral Au+Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.

International stock market linkages: Evidence from the pre- and post-October 1987 period

Abstract: This paper uses recent developments in the theory of cointegration to provide new methods of testing the linkage and dynamic interactions among stock market movements. Our findings are in sharp contrast with previous research which discovered strong interdependence among national stock markets prior to October 1987. For the post-October 1987 period, however, our results show that the degree of international co-movements among stock price indices has increased substantially, with the Nikkei index the only exception. Furthermore, the US stock market is found to have a considerable impact on the French, German and UK markets in the post-crash period. We also find the response of the French, German and UK markets to US stock market innovations to be consistent with the view of cross-border informationally efficient stock markets. Finally, we find the Japanese equity market performance to have no links with both the US stock market and the stock markets in France, Germany and UK during the pre-and post-October crash period.