Calculation of tensor susceptibility beyond rainbow-ladder approximation of Dyson-Schwinger equations approach

Details Calculation of tensor susceptibility beyond rainbow-ladder approximation of Dyson-Schwinger equations approach Calculation of tensor susceptibility beyond rainbow-ladder approximation of Dyson-Schwinger equations approach

2010-03-28

arxiv.org/abs/1003.5359v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 13 figures

Scientific paper

In this paper, we extend the calculation of tensor vacuum susceptibility in the rainbow-ladder approximation of the Dyson-Schwinger (DS) approach in [Y.M.Shi, K.P.Wu, W.M.Sun, H.S.Zong, J.L.Ping, Phys. Lett. B $\bf{639}$, 248 (2006)] to that of employing the Ball-Chiu (BC) vertex. The dressing effect of the quark-gluon vertex on the tensor vacuum susceptibility is investigated. Our results show that compared with its rainbow-ladder approximation value, the tensor vacuum susceptibility obtained in the BC vertex approximation is reduced by about 10%. This shows that the dressing effect of the quark-gluon vertex is not large in the calculation of the tensor vacuum susceptibility in the DS approach.

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