Current algebra imposes satisfactory relations between the spectra of the 1 + and 1mesons.!) If chiral SUeZ) &;;SU(Z) were an exact symmetry, we may expect the A2 (JPG=Z+ -) meson to be accompanied with an 1=1, JPG=Z-+ meson of the same mass, we call it the A 25 meson. We will give relations between the spectral functions of the symmetric tensor current Tf",u) and symmetric axial-tensor current T~~ul> which couple to the Z+ and Z-mesons, respectively, where Tf",,) = (l/Z) (T~u+TC;}.), and the baryon part of T~u is given as follows, T~~,) and T~";' are given by replacing r Ii in Eq. (1) with r"r5' Let us begin with a free Hamiltonian (Z) where H oo is the invariant part under SU (Z) &;;SU (Z), and ,1,uo, which corresponds to the baryon mass term, is noninvariant.We define the operators pua and Pc";,) as follows,and similarly pu5a and Pi'u). By commuting pu5a with uo, we get bu 5a which is proportional.to (l/Z) (?itar50vif;-oijjrar5if;):
t). (4)The divergence of the axial tensor current can be expressed in terms of this commutator:o"T~~=i[p}a, ,1,uoJ =Z,1,bv 5a , o"T~~,)=,1,bv5a, o"T't",,) =0 .(5) bV 5a is a sort of effective meson operator, which has 1=1, JPG=I++,and a possible candidate for such a meson is B(lZ10). To illustrate the commutation relations of Pc";,) and Pf;'j with interactions, we introduce a simple model:where B" is a neutral vector meson field.We also replace 0" in T;, and T~~ with O"-iEB,,, Then divergences of the currents are given by o"T(~u)=iEfvijjr"raif;,o "Ti':,) =iEfv,,?ir "r5raif;+ J..bv 5a -iElBv?ir 5 r a if;,where fv "=ovB,,-o,,Bv' Ttl") and Tt:u) have no Bet meson terms because of the absence of isotopic spin of the meson. We note that both sides of Eq. (7) and the double divergence o"ovT{,,,,u) have odd G parity, and o"ovTt;,) has even G parity.We consider the following vacuum ex-at East Tennessee State University on May 31, 2015 http://ptp.oxfordjournals.org/ Downloaded from