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 widths for pionic decays of lowest two excited doublets (0+, 1+) and(1+, 2+) of heavy mesons are studied with QCD sum rules in the leading order of heavy quark effective theory. The ambiguity due to presence of two distinct 1+ states are solved. The soft pion approximation is not used.
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 m asses of excited heavy m esons are studied with sum rules in the heavy quark e#11;ective theory.A setofinterpolating currentscreating (annihilating) excited heavy m esonswith arbitrary spin and parity are proposed and their propertiesarediscussed.Num ericalresultsattheleading orderofthe O (1=m Q ) expansion are obtained for the lowest doublets (0+ ;1+ ) and(1+ ;2+ ).
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： We analyze various possible interpretations of the narrow state D+sJ (2632) observed by SELEX Collaboration recently, which lies above threshold and has abnormal decay pattern. These interpretations include: (1) several versions of tetraquarks; (2) conventional cs¯ meson such as the first radial excitation of Ds(2112) with abnormally large SU(3) symmetry breaking; (3) conventional cs¯ meson with abnormally large η1 coupling; (4) heavy hybrid meson. We discuss the physical implications of each interpretation. For example, if the existence of D +sJ (2632) is confirmed as the first radial excitation of Ds(2112) by other experiments, it will be helpful to look for (1) its SU(3) flavor partners D 0,+J(2530); (2) its B-meson analogues B0,+J(5840), B+sJ (5940); (3) S-wave two pion decaymodes.
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： Within the framework of the heavy quark effective theory, QCD sum rules are used to calculate the masses of p-wave ¯cs states. The results for 0+ and 1+ states with the angular momentum of the light component jl = 1/2 are consistent with the experimental values for Ds(2317) and Ds(2457), respectively.
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： In the framework of heavy quark effective theory we use QCD sum rules to calculate the masses of the ¯cs (0+, 1+) and (1+, 2+) excited states. The results are consistent with that the states DsJ (2317) and DsJ (2460) observed by BABAR and CLEO are the 0+ and 1+ states in the jl =12+doublet.
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