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 leading Isgur-Wise form factor ξ(y) parametrizing the semileptonic transitionsb → #3;1/2c1 ℓ¯ν and #3;b → #3;3/2c1 ℓ¯ν is calculated by using the QCD sum rules in the framework of heavy quark effective theory, where #3;1/2 c1 and #3;3/2 c1 is the orbitally excited charmed baryon doublet with JP = (1−/2, 3−/2). The interpolating currents with transverse covariant derivative are adopted for #3;1/2 c1 and #3;3/2 c1 in the analysis. The slope parameter ρ2 in linear approximation of the Isgur-Wise function is obtained to be ρ2 = 2.01, and the interception to be ξ(1) = 0.29. The decay branching ratios are estimated.