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arXiv 1202.0454nucl-thhep-exhep-lathep-phnucl-ex
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用非微扰QCD方法研究重夸克对称性

Heavy-quark symmetries in the light of nonperturbative QCD approaches

Bruno El-Bennich, Craig D. Roberts, Mikhail A. Ivanov

摘要:

本文评述了在非微扰框架下得到的重夸克自旋对称性和味对称性在重-轻衰变常数、形状因子和有效耦合中的有效性,这些都是由QCD的Dyson-Schwinger方程研究所激发的。在此过程中,我们对两个有效的非物理耦合做出了新的预测:g_{DsDK} = 24.1+2.5/-1.6和g_{BsBK} = 33.3+4.0/-3.7。

英文摘要:

We critically review the validity of heavy-quark spin and flavor symmetries in heavy-light decay constants, form factors and effective couplings obtained within a nonperturbative framework, the ingredients of which are all motivated by Dyson-Schwinger equations studies of QCD. Along the way, we make new predictions for two effective nonphysical couplings: g_{DsDK} = 24.1+2.5/-1.6 and g_{BsBK} = 33.3+4.0/-3.7.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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