A rigorous spectral representation of relativistic random-phase approximation is presented.Explicit expression is derived for the effective particle-hole interaction which contains the direct term Kan,the exchange ter...A rigorous spectral representation of relativistic random-phase approximation is presented.Explicit expression is derived for the effective particle-hole interaction which contains the direct term Kan,the exchange term KaQ and the kernel for the fermion line renormalization K_(fr).It is shown that according to our method,not only K_(an) but also K_(sc) and K_(fr) can be given rigorously in a form which depends only on one ω(energy)-variable and they all take account of the retardation effect properly.展开更多
The retardation effect of gluon propagation on baryon spectra is examined.The calculated results show that the consideration of this effect gives appreciable improvements on both positive and negative parity baryon sp...The retardation effect of gluon propagation on baryon spectra is examined.The calculated results show that the consideration of this effect gives appreciable improvements on both positive and negative parity baryon spectra.展开更多
基金Supported by the National Natural Science Foundation of China and the Foundation of State Education Commission.
文摘A rigorous spectral representation of relativistic random-phase approximation is presented.Explicit expression is derived for the effective particle-hole interaction which contains the direct term Kan,the exchange term KaQ and the kernel for the fermion line renormalization K_(fr).It is shown that according to our method,not only K_(an) but also K_(sc) and K_(fr) can be given rigorously in a form which depends only on one ω(energy)-variable and they all take account of the retardation effect properly.
文摘The retardation effect of gluon propagation on baryon spectra is examined.The calculated results show that the consideration of this effect gives appreciable improvements on both positive and negative parity baryon spectra.
