I summarize recent experimental results on B to charmonium decays. Decays of B meson to final states that include charmonium states play an important role in the study of CP violation at B-factories. The decay modes BCP → J/ψKS, ψ(2S)KS, χc1KS, ηcKS, J/ψKL and J/ψK (K → KSπ ) have been used for sin2φ1 measurements [1] [2] [3] [4] [5]. These two-body decay modes are dominated by the color suppre...

An opto-electronic receiver (detector and pre-amplifier) necessary to meet the demands of high capacity deep-space missions is designed for a Mars–Earth optical communication link. The receiver requirements are driven by link performance (data rate, bit-error rate, and margin), delivered power, pulse width, background signal, telescope quality, and atmospheric effects. Meeting these requirement...

For piecewise smooth data, edges can be recognized by jump discontinuities in the data. Successful edge detection is essential in digital signal processing as the most relevant information is often observed near the edges in each segmented region. In this paper, using the concentration property of existing local edge detectors and the clustering property of sigmoidal transformations, we provide...

We describe an adaptive version of the Hassenstein{Reichardt detector , which models direction-selective computation in the y. The Hassenstein{ Reichardt detector has a xed time constant. However, several researchers have shown that the time constant of the y's motion system adapts to the temporal frequency or speed of the input. The time constant of our adaptive detector also adapts to the inp...

The heavy-ion program at the LHC will be pursued by three experiments including ATLAS, a multipurpose detector to study p+p collisions. A report on the potential of the ATLAS detector to uncover new physics in Pb+Pb collisions at energies thirty times larger than energy available at RHIC is presented. Key aspects of the heavy-ion program of the ATLAS experiment, with the emphasis on extending m...

In this paper we report on the design, fabrication, assembly and testing of an x-ray detector based on a bulk micromachined photodiode (BMMPD) with a cavity filled with a scintillating crystal. The x-ray photons that reach the detector are first converted to visible light by the scintillating crystal. The visible light is then detected by the BMMPD, producing an electric current with a value pr...

The performance of hybrid GaAs pixel detectors as X-ray imaging sensors were investigated at room temperature. These hybrids consist of 300 μm thick GaAs pixel detectors, flip-chip bonded to a CMOS Single Photon Counting Chip (PCC). This chip consists of a matrix of 64 x 64 identical square pixels (170 μm x 170 μm) and covers a total area of 1.2 cm. The electronics in each cell comprises a prea...

This paper reports design, fabrication and test results of a tunable pyroelectric detector with an integrated micromachined Fabry-Perot (FP) filter for gas analysis in the Mid-Wave Infrared (MWIR). The new approach is based on a bulk micromachined Fabry-Perot interferometer with an air cavity, which is electrostatically tuned. Various types of moveable reflectors and spring configurations have ...