Strange Isosinglet Versus Octet Axial Current

SPEAKER

Prof. Dr. Mariana Kirchbach, Inst. for Nuclear Theory, Mainz, Germany

TIME AND PLACE:

May 15, 1998
in Theoretical Division Conference Room, Rm 121, SM 123, TA-3
at 3:30 - 4:15 pm

ABSTRACT

The flavor SU(3)_f group symmetry of QCD is systematically considered as the heavy c quark limit of SU(4)_f. Within that scheme it is argued that because of the U(1)_A anomaly, Gell--Mann's choice for the realization of the su(3)_f algebra does not apply to the case of neutral axial currents. Rather, Weyl's choice for the SU(4)_f generators has to be used which leads to a neutral strong axial current having same structure (up to a constant factor) as the weak one. The spin current emerging in the present scenario is "crisis free."

CONTACT PERSON:

Hans Ziock, 505-667-7265, P-25, MS H846 ziock@lanl.gov

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