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赵明刚 《中国新技术新产品精选》2011,(15):105-105
众所周知,电能是现代工业生产的主要能源和动力。电能既易于由其它形式的能量转换而来,又易于转换为其它形式的能量以供应用;电能的输送的分配既简单经济,又便于控制、调节和测量,有利于实现生产过程自动化。因此,电能在现代工业生产及整个国民经济生活中应用极为广泛。 相似文献
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In contrast with B0-ˉB0, Bs-ˉBs mixing where the standard model(SM) contributions overwhelm that of the new physics beyond standard model(BSM), a measured relatively large D0-ˉD0mixing where the SM contribution is negligible, definitely implies the existence of the new physics BSM. It is natural to consider that the rare decays of D meson might be more sensitive to new physics, and the decay mode D0→μ+μ-could be an ideal area to search for new physics because it is a flavor changing process. In this work we look for a trace of the new physics BSM in the leptonic decays of D0. Concretely we discuss the contributions of unparticle or an extra gauge boson Z while imposing the constraints set by fitting the D0-ˉD0mixing data. We find that the long-distance SM effects for D0→lˉl still exceed those contributions of the BSM under consideration, but for a double-flavor changing process such as D0→μ±e, the new physics contribution would be significant. 相似文献
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使用基于北京谱仪Ⅲ探测器(BESⅢ)及其软件系统(BOSS)的蒙特卡罗模仿方法,给出了对D介子缪子半轻衰变分支比绝对测量的进行方法及其所能达到的统计精度.这些缪子半轻衰变是D0→Mμ+νμ和D+→Mμ+νμ,其中M表示K-,π-,K0,K*0等轻介子. 相似文献
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The CP violation in the D system is predicted to be an unobserved level in the Standard Model. In this paper, we describe the method of searching for CP violation decay processes with the coherently produced D00 mesons from the ψ(3770) decay. The CP violation decay processes can be searched for at the BES-III experiment. The experimental sensitivity for searching for the CP violation can reach about a 10-4 level with a ψ(3770) data sample of about 20 fb-1. 相似文献
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We give a brief discussion on the measurement of the cross section for D^-D production around the ψ(3770) resonance, and point out a new calculation of the cross sections based on the absolute measurements. Compared with single tag and double tag analyses, the new calculation provides us with many more opportunities to perform the cross section measurement. 相似文献
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知识经济与人的全面发展 总被引:2,自引:0,他引:2
人的全面发展是人的发展的终极目标和方向,是人类社会发展的最高理想。然而,人的全面发展的实现需要建立在社会生产力高度发达的基础之上。知识经济,作为有别于农业经济、工业经济的新的经济形态,将以其高度发达的生产力,有力推动着物质文明、政治文明、精神文明和生态文明的发展,从而为消除人的异化和为人的充分、自由的全面发展,提供坚实的基础。知识经济和人的全面发展是紧密联系、内在统一的整体。知识经济是“以人为本”的经济,它的终极目标是实现人的全面发展,而人类只有提高了自身素质,增强了各方面能力,才能促进知识经济的发展。 相似文献
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In contrast with B0-B0, Bs-Bs mixing where the standard model (SM) contributions overwhelm that of the new physics beyond standard model (BSM), a measured relatively large D0-D0 mixing where the SM contribution is negligible, definitely implies the existence of the new physics BSM. It is natural to consider that the rare decays of D meson might be more sensitive to new physics, and the decay mode D0→μ+μ- could be an ideal area to search for new physics because it is a flavor changing process. In this work we look for a trace of the new physics BSM in the leptonic decays of D0. Concretely we discuss the contributions of unparticle or an extra gauge boson Z' while imposing the constraints set by fitting the D0- D0 mixing data. We find that the long-distance SM effects for D0→l1 still exceed those contributions of the BSM under consideration, but for a double-flavor changing process such as D0→μ±e+, the new physics contribution would be significant. 相似文献
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杨丽桃 李浩斌 岳骞 康克军 程建平 李元景 王子敬 M.Agartioglu 安海鹏 常建平 陈景瀚 陈云华 邓智 杜强 宫辉 何力 胡津纬 胡庆东 黄瀚雄 贾历平 江灏 李红 李荐民 李金 李霞 李学潜 李玉兰 林枫凯 林兴德 刘书魁 刘仲智 马豪 马菁露 潘辉 任杰 阮锡超 B.Sevda Vivek Sharma 申满斌 Lakhwinder Singh Manoj Kumar Singh 唐昌建 唐维优 田阳 王继敏 王力 王青 王轶 吴世勇 吴玉成 幸浩洋 徐音 薛涛 杨松伟 易难 喻纯旭 于海军 岳剑峰 曾雄辉 曾鸣 曾志 张云华 赵明刚 赵伟 周济芳 周祖英 朱敬军 朱忠华 《中国物理C(英文版)》2018,(2)
We report results of a search for light weakly interacting massive particle(WIMP) dark matter from the CDEX-1 experiment at the China Jinping Underground Laboratory(CJPL). Constraints on WIMP-nucleon spin-independent(SI) and spin-dependent(SD) couplings are derived with a physics threshold of 160 eVee, from an exposure of 737.1 kg-days. The SI and SD limits extend the lower reach of light WIMPs to 2 GeV and improve over our earlier bounds at WIMP mass less than 6 GeV. 相似文献