A note on the QCD vacuum tensor susceptibility
Abstract
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 moment of the transversity distribution function h_{1}(x).
 Publication:

Physics Letters B
 Pub Date:
 February 1997
 DOI:
 10.1016/S03702693(97)001263
 arXiv:
 arXiv:hepph/9612462
 Bibcode:
 1997PhLB..395..307B
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 8 pages, LaTeX and 1 postscript figure