Second Class Current in QCD Sum Rules

H. Shiomi

doi:10.1016/0375-9474(96)80003-A

paper

Second Class Current in QCD Sum Rules

arXiv:hep-ph/9601329 · doi:10.1016/0375-9474(96)80003-A

Abstract

Induced tensor charge of the nucleon $g_{T}$ , which originates from G-parity violation, is evaluated from QCD sum rules. We find that $g_{T} / g_{A}$ with $g_{A}$ being the axial charge is $-$ 0.0152 $\pm$ 0.0053 which is proportional to u-d quark mass difference. This result is small compared to preliminary analysis of the experiment, but is consistent with the estimate in the MIT bag model.

20 pages, latex, 7 figures appended as uu-encoded file