4,784 research outputs found
Electron Identification in Belle
We report on electron identification methods and their performance in the
Belle experiment at the KEK-B asymmetric B-Factory storage ring.
Electrons are selected using a likelihood approach that takes information from
the electromagnetic calorimeter, the central drift chamber, and the silica
aerogel Cherenkov counters as input. We achieve an electron identification
efficiency of with a fake rate of for the momentum range between 1.0 GeV/ and 3.0 GeV/ in
laboratory frame.Comment: 20 page
Energy Loss Function and Source Function for Au 4f Photoelectrons Derived by Monte Carlo Analysis of Reflection Electron Energy Loss Spectroscopy (REELS) and X-Ray Photoelectron Spectroscopy (XPS) Spectra
We have derived the energy loss function of Au for 1 keV electrons by Monte Carlo analysis of the reflection electron energy loss spectroscopy (REELS) spectra. This energy loss function was significantly different from the optical loss function widely used and has revealed that the surface excitation affects the energy loss spectrum of keV electrons.
X-ray photoelectron spectroscopy (XPS) background subtraction has been recently developed by using the energy loss function derived from the transmission electron energy loss spectroscopy (TEELS). We have demonstrated that the energy loss function derived from REELS has enabled a more accurate Au 4f XPS spectrum to be obtained after subtraction of the inelastic background
Spin and spin-spin correlations in chargino pair production at future linear e+e- colliders
A possibility to measure the spin and spin-spin correlations of a chargino
pair is investigated in the process electron positron -> chargino_1
anti-chargino_1 -> (neutralino_1 quark anti-quark) (neutralino_1 quark
anti-quark) at future linear-collider energies. The total and the differential
cross sections are calculated by the GRACE system which allows for the full
spin correlation. Experimental sensitivity of the measurements are examined by
assuming the limited detector resolution, the initial state radiation and the
beam-beam effect (beamstrahlung). It is found that generally the spin-spin
correlation can only be measured with a lower sensitivity than the chargino
spin itself. The dependence of the correlation measurements on the relevant
SUSY parameters can be seen for a light sneutrino case, but the situation
becomes worse for a heavier sneutrino.Comment: 23 pages, 7 figures, 6 tables; added reference for section
Analysis of the chargino and neutralino mass parameters at one-loop level
In the Minimal Supersymmetric Standard Model (MSSM) the masses of the
neutralinos and charginos depend on the gaugino and higgsino mass parameters M,
M' and . If supersymmetry is realized, the extraction of these parameters
from future high energy experiments will be crucial to test the underlying
theory. We present a consistent method how on-shell parameters can be properly
defined at one-loop level and how they can be determined from precision
measurements. In addition, we show how a GUT relation for the parameters M and
M' can be tested at one-loop level. The numerical analysis is based on a
complete one-loop calculation. The derived analytic formulae are given in the
appendix.Comment: 16 pages, 8 figure
Easily Installable Wireless Behavioral Monitoring System with Electric Field Sensor for Ordinary Houses
This paper describes an indoor behavioral monitoring system for improving the quality of life in ordinary houses. It employs a device that uses weak radio waves for transmitting the obtained data and it is designed such that it can be installed by a user without requiring any technical knowledge or extra constructions. This study focuses on determining the usage statistics of home electric appliances by using an electromagnetic field sensor as a detection device. The usage of the home appliances is determined by measuring the electromagnetic field that can be observed in an area near the appliance. It is assumed that these usage statistics could provide information regarding the indoor behavior of a subject. Since the sensor is not direction sensitive and does not require precise positioning and wiring, it can be easily installed in ordinary houses by the end users. For evaluating the practicability of the sensor unit, several simple tests have been performed. The results indicate that the proposed system could be useful for collecting the usage statistics of home appliances
Three-dimensional integration technology for real time micro-vision system
科研費報告書収録論文(課題番号:06555103・試験研究(B)(1)・H6~H7/研究代表者:小柳, 光正/超高速光バスを有するモンテカルロ解析専用並列処理システムの試作
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