https://scholars.lib.ntu.edu.tw/handle/123456789/442879
標題: | Effects of a fourth family on b→sγ and a useful parametrization of quark mixing for rare B decays | 作者: | WEI-SHU HOU | 公開日期: | 1985 | 卷: | 32 | 期: | 1 | 起(迄)頁: | 441-446 | 來源出版物: | Physics Letters B | 摘要: | The effects of a fourth family on the decays b→s(d)γ are reported. The BR(b→sγ) can become ∼10-3, i.e., a gain from the three-generation result by an order of magnitude. For very massive t′ (mt > 200GeV) the four-generation result is not sensitive to mt, making the reaction usuful for probing the new mixing angles of the fourth generation. We emphasize that combined information from b→sγ, sℓ+ℓ- and the hadronic b→s transition without charmed particles would be useful for constraining mass scales and mixing parameters of a fourth generation. In view of the importance of B decays we present a new parametrization of the 4×4 mixing matrix that appears to be better suited for the study of B physics. © 1987. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/442879 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001106520&doi=10.1016%2f0370-2693%2887%2990135-3&partnerID=40&md5=303d24412266e6ff3e14a0e5567c25ac |
ISSN: | 03702693 | DOI: | 10.1016/0370-2693(87)90135-3 |
顯示於: | 物理學系 |
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