A Note on the QCD Vacuum Tensor Susceptibility

Details A Note on the QCD Vacuum Tensor Susceptibility A Note on the QCD Vacuum Tensor Susceptibility

1996-12-24

arxiv.org/abs/hep-ph/9612462v2

Phys.Lett. B395 (1997) 307-310

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, LaTeX and 1 postscript figure; needs epsfig.sty; accepted for publication in Physics Letters B

Scientific paper

10.1016/S0370-2693(97)00126-3

We consider the procedure of determination of induced quark condensates in the QCD sum rule approach. It is noted that the previous estimations of this value were very rough. It is shown, that the detailed analyses of this parameter of QCD vacuum leads to the conclusion that the value of the tensor susceptibility has opposite sign and much larger than estimations which were obtained before. The reason of this contradiction is discussed. It is noted that naive ways of determination of induced condensates may lead to wrong results. The case of tensor susceptibility is the example demonstrating the importance of the procedure which is applied for calculation of such condensates. New results for the nucleon tensor charge are presented. The tensor charge is related to the first momentof the transversity distribution function $h_1(x)$.

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