Status Report of Neutral Kaon photo-production study using Neutral Kaon Spectrometer 2 (NKS2) at LNS-Tohoku(I. Nuclear Physics)

The approach described in this paper uses an array of Field Programmable Gate Array (FPGA) devices to implement a fault tolerant hardware system that can be compared to the running of fault tolerant software on a traditional processor. Fault tolerance is achieved is achieved by using FPGA with on the fly partial programmability feature. Major considerations while mapping to the FPGA includes the size of the area to be mapped and communication issues related to their communication. Area size selection is compared to the page size selection in Operating System Design. Communication issues between modules are compared to the software engineering paradigms dealing with module coupling, fan-in, fan-out and cohesiveness. Finally, the overhead associated with the downloading of the reconfiguration files is discussed

ニュウシャ エネルギー 1.5 2.4GeV ニ タイスル Li C Al Cu ゲンシカク デノ ファイ チュウカンシ ヒカリ セイセイ ハンノウ

京都大学0048新制・課程博士博士(理学)甲第11306号理博第2864号新制||理||1428(附属図書館)22949UT51-2005-D57京都大学大学院理学研究科物理学･宇宙物理学専攻(主査)教授 今井 憲一, 教授 谷森 達, 助教授 斉藤 直人学位規則第4条第1項該当Doctor of ScienceKyoto UniversityDA

K−d→πΛNK^- d\rightarrow \pi \Lambda N reaction for studying charge symmetry breaking in the ΛN\Lambda N interaction

We discuss charge symmetry breaking in the $\Lambda N$ interaction. In order to investigate the $\Lambda p$ and $\Lambda n$ interactions at low energies, we propose to utilize the $K^-d\to \pi^-\Lambda p$ and $K^-d\to \pi^0\Lambda n$ reactions. They are symmetric under the exchange of both the pion and nucleon isospin partners in the final states. This advantage allows us to study charge symmetry breaking in the $\Lambda N$ interaction. We calculate the differential cross sections of these reactions with stopped kaons theoretically and discuss the possibility to extract the scattering length and effective range of the $\Lambda N$ scattering. With stopped kaons, the $\Lambda N$ interaction takes place dominantly in the spin-triplet state thanks to the deuteron spin and $s$-wave dominance of the scattering amplitudes at the low energy. We find that the ratio of the differential cross sections as a function of the $\Lambda N$ invariant mass between the two reactions is useful for revealing how charge symmetry breaking, or isospin symmetry breaking appears in the low-energy $\Lambda N$ scattering.Comment: 13 pages, 19 figures, 1tabl