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hep-ph2000★ 8 cited
Axial U(1) dynamics in eta and eta' photoproduction
Steven D. Bass, Stefan Wetzel, Wolfram Weise
We discuss the sensitivity of eta and eta' photoproduction near threshold to the gluonic OZI breaking parameters in the U_A(1)-extended effective chiral Lagrangian for low-energy Q…
hep-ph1997
Measuring anomalous ``spin'' in elastic e-p or ν-p and deep inelastic e-p scattering
S. D. Bass, R. J. Crewther, F. M. Steffens +1
We obtain a general rule that the O(1/log m_h) term due to the current \bar{h}γ_μγ_5h of a mass-m_h quark h in f-flavour theory is -3\bar{g}^2_f(m_h)/{2π^2(33-2f)} times the flavou…