Richard Arnowitt

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We study the feasibility of detecting the stau neutralino (˜ τ 1-˜ χ 0 1) coannihilation region at the LHC using tau (τ) leptons. The signal is characterized by multiple low energy τ leptons from˜χ 0 2 → τ ˜ τ 1 → τ τ ˜ χ 0 1 decays, where the˜τ 1 and˜χ 0 1 mass difference (∆M) is constrained to be 5-15 GeV by current experimental bounds including the bound(More)
In the light of new experimental results on B → Kπ decays, we study the decay processes B → Kπ in the framework of both R-parity conserving (SUGRA) and R-parity violating supersymmetric models. We find that any possible deviations from the Standard Model indicated by the current data for the branching ratios and the direct CP asymmetries of B → Kπ can be(More)
We probe the stau-neutralino co-annihilation domain of the parameter space allowed by the current experimental bounds on the light Higgs mass, the b → sγ decay, and the amount of neutralino cold dark matter within the framework of minimal SUGRA models at a 500 GeV e + e − linear collider. The most favorable signals of SUSY are stau pair production and(More)
We examine the stau-neutralino coannihilation (CA) mechanism of the early Universe. We use the minimal supergravity (mSUGRA) model and show that from measurements at the CERN Large Hadron Collider one can predict the dark matter relic density with an uncertainty of 6% with 30 fb(-1) of data, which is comparable to the direct measurement by the Wilkinson(More)
Novel Optical Devices for Information Processing. Optics has the inherent advantages of parallelism and wide bandwidths in processing information. However, the need to interface with electronics creates a bottleneck that eliminates many of these advantages. The proposed research explores novel optical devices and techniques to overcome some of these(More)
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