Richard L. Arnowitt

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Studies of new hyperbolic systems for the Einstein evolution equations show that the “slicing density” α(t, x) can be freely specified while the lapse N = αg cannot. Implementation of this small change in the Arnowitt-Deser-Misner action principle leads to canonical equations that agree with the Einstein equations whether or not the constraints are(More)
The neutralino-proton cross section is examined for supergravity models with R-parity invariance with universal and non-universal soft breaking. The region of parameter space that dark matter detectors are currently (or will be shortly) sensitive i.e. (0.1 − 10) × 10−6 pb, is examined. For universal soft breaking (mSUGRA), detectors with sensitivity σχ̃0 1(More)
Gauged Supergravities from Spherical Reductions. (December 2001) Tuan Anh Tran, B.S., Hanoi University, Vietnam Chair of Advisory Committee: Dr. Christopher N. Pope This dissertation is devoted to deriving the bosonic sectors of certain gauged supergravities in various dimensions from reducing eleven-dimensional supergravity, type IIA and type IIB(More)
An analysis is given of the annual modulation signal for the direct detection of relic neutralinos within the framework of supergravity unified models. It is shown that both the minimal and the non-minimal SUGRA models can generate neutralinoproton cross-sections at the level compatible with the signals reported in the DAMA experiment at the Gran Sasso(More)
We examine the stau-neutralino co-annihilation mechanism of the early universe. We use the minimal supergravity (mSUGRA) model and show that from measurements at the LHC one can predict the dark matter relic density with an uncertainty of 6% with 30 fb of data, which is comparable to the direct measurement by WMAP. This is possible by introducing(More)
The electron electric dipole moment (de) and the muon magnetic moment anomaly (aμ) recently observed at BNL are analyzed within the framework of SUGRA models with CP violating phases at the GUT scale. It is seen analytically that even if de were zero, there can be a large Bino mass phase (ranging from 0 to 2π) with a corresponding large B soft breaking mass(More)