There are some uncertain charazteristics of the Ds1（2536）, which deserves further discussion. Based on the assumption that the meson is constituted by c s, and belongs to T doublet （1^＋, 2^＋）, radiative decays ...There are some uncertain charazteristics of the Ds1（2536）, which deserves further discussion. Based on the assumption that the meson is constituted by c s, and belongs to T doublet （1^＋, 2^＋）, radiative decays Ds1（2536） → Ds（1968） ＋γ and Ds1（2536） → Ds^＊（2112） ＋ γ are studied in the CQM model The large branching ratios of them from our calculations not only indicate the process may be detected in the future experiments, but also can give a deep comprehension of the structure of it.展开更多
Based on the assumption that Ds1（2536） and Ds2（2573） belong to T doublet （1^＋,2^＋）, we calculate the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） in terms of the Constituent Quark Meson （CQM） mod...Based on the assumption that Ds1（2536） and Ds2（2573） belong to T doublet （1^＋,2^＋）, we calculate the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） in terms of the Constituent Quark Meson （CQM） model. For Bs → Ds1 （2536）＋ lv^- and B→ → Ds2 （2573）＋lv^-, the order of magnitude of the obtained branching ratios is 10^-3. Our numerical results of the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） are large, which implies that two semileptonic decays should be seen in future experiments.展开更多
China＇s performance in the global economic crisis has attracted the world＇s attention. People are looking to China, eager to learn about the management level of Chinese government and enterprises, as well as product...China＇s performance in the global economic crisis has attracted the world＇s attention. People are looking to China, eager to learn about the management level of Chinese government and enterprises, as well as product quality. In these matters, China draws on the generally adopted worldwide practice in quality evaluation： the certification and accreditation system. This system simultaneously extends the basic national technical platform for external trade. Using the China Quality Mark Certification Group （CQM） as an example,展开更多
基金Supported by National Natural Science Foundation of China under Grant No.10847117 Hebei Province Department of Education under Grant No.2007409 Doctor Foundation of Hebei University under Grant No.Y2006081
文摘There are some uncertain charazteristics of the Ds1（2536）, which deserves further discussion. Based on the assumption that the meson is constituted by c s, and belongs to T doublet （1^＋, 2^＋）, radiative decays Ds1（2536） → Ds（1968） ＋γ and Ds1（2536） → Ds^＊（2112） ＋ γ are studied in the CQM model The large branching ratios of them from our calculations not only indicate the process may be detected in the future experiments, but also can give a deep comprehension of the structure of it.
基金Natural Science Fund of Hebei Province (A2005000090,E2005000129)Fund of Education Department of HebeiProvince (2007409)Natural Science Fund of Hebei University (2005007)
文摘Based on the assumption that Ds1（2536） and Ds2（2573） belong to T doublet （1^＋,2^＋）, we calculate the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） in terms of the Constituent Quark Meson （CQM） model. For Bs → Ds1 （2536）＋ lv^- and B→ → Ds2 （2573）＋lv^-, the order of magnitude of the obtained branching ratios is 10^-3. Our numerical results of the semileptonic decays of Bs to Ds1（2536） and Ds2（2573） are large, which implies that two semileptonic decays should be seen in future experiments.
文摘China＇s performance in the global economic crisis has attracted the world＇s attention. People are looking to China, eager to learn about the management level of Chinese government and enterprises, as well as product quality. In these matters, China draws on the generally adopted worldwide practice in quality evaluation： the certification and accreditation system. This system simultaneously extends the basic national technical platform for external trade. Using the China Quality Mark Certification Group （CQM） as an example,
