分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-17
摘要： The HQET sum rule analysis for the #3;b matrix element of the four-quark operator relevant to its lifetime is reported. Our main conclusion is that the lifetime ratio(#3;b)/#28;(B0) can be as low as 0.91.
分类： 物理学 >> 普通物理:统计和量子力学,量子信息等 提交时间： 2017-09-17
摘要： The mass spectra of the L = 1 orbitally excited heavy baryons with light quarks inboth the spin-flavor symmetric and the mixed representations are studied by the1/Nc expansion method in the framework of the heavy quark effective theory. The mixing effect between the baryons in the two representations is also considered.The general pattern of the spectrum is predicted which will be verified by theexperiments in the near future.
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