ar X iv : h ep - e x / 01 11 04 1 v 1 1 2 N ov 2 00 1 CLNS 01 / 1768 CLEO RESULTS : B DECAYS

نویسنده

  • DAVID G. CASSEL
چکیده

Measurements of many Standard Model constants are clouded by uncertainties in nonperturbative QCD parameters that relate measurable quantities to the underlying parton-level processes. Generally these QCD parameters have been obtained from model calculations with large uncertainties that are difficult to quantify. The CLEO Collaboration has taken a major step towards reducing these uncertainties in determining the CKM matrix elements |Vcb| and |Vub| using new measurements of the branching fraction and photon energy spectrum of b → sγ decays. This report includes: the new CLEO measurements of b → sγ decays, |Vcb|, and |Vub|; the first results from CLEO III data – studies of B → Kπ, ππ, and KK̄ decays; mention of some other recent CLEO B decay results; and plans for operating CESR and CLEO in the charm threshold region.

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تاریخ انتشار 2001