We show that the observation of energetic charged leptons from semileptonic b decays at the LEP and SLC Z-boson factories offers a unique opportunity to measure the quark mixing matrix element Vub. We present various distributions of the b decay products to show that the b → u decays can be cleanly separated from the b → c decays, with a signal of O(100) events per million Z bosons produced.
Bibliographical noteFunding Information:
Kwi-Rae Kim, who died on July 17, 1994,d uring his visit to Durham, where a part of this work has been done. C.S.K. was supportedi n part by the Korean Science and Engineering Foundation, in part by the Non-Direct-Research-Fund, Korea Research Foundation 1993, in part by the Center for Theoretical Physics, Seoul National University, in part by the Yonsei Uni-versityF aculty ResearchG rant, and in partb y theB asic
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics