Second Class Current in QCD Sum Rules

الأصل · EN

Induced tensor charge of the nucleon gₜ, which originates from G-parity violation, is evaluated from QCD sum rules. We find that gₜ/gₐ with gₐ being the axial charge is -0.0152 ± 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.