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Spectra of Free Diquark in the Bethe-Salpeter Approach

by: Yan-Ming Yu, Hong-Wei Ke, Yi-Bing Ding, Xin-Heng Guo, Hong-Ying Jin, Xue-Qian Li, Peng-Nian Shen, Guo-Li Wang
Communications in Theoretical Physics, Vol. 46, No. 6. (9 Feb 2006), pp. 1031-1039, doi:10.1088/0253-6102/46/6/015  Key: citeulike:12133430

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Abstract

In this work, we employ the Bethe-Salpeter (B-S) equation to investigate the spectra of free diquarks and their B-S wave functions. We find that the B-S approach can be consistently applied to study the diqaurks with two heavy quarks or one heavy and one light quarks, but for two light-quark systems, the results are not reliable. There are a few free parameters in the whole scenario which can only be fixed phenomenologically. Thus, to determine them, one has to study baryons which are composed of quarks and diquarks.


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