Decay of axial-vector mesons into VP and P$γ$

Details Decay of axial-vector mesons into VP and P$γ$ Decay of axial-vector mesons into VP and P$γ$

2003-06-20

arxiv.org/abs/hep-ph/0306188v2

Phys.Rev. D70 (2004) 094006

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 pages, 1 figure; version accepted in Phys. Rev. D

Scientific paper

10.1103/PhysRevD.70.094006

We propose a phenomenological Lagrangian for the decay of the SU(3) nonets of the axial-vector mesons of $J^{PC}=1^{+-},1^{++}$ into a vector meson and a pseudoscalar constructed with tensor fields for the vector and axial-vector mesons. The formulation leads to a good reproduction of the different decay branching ratios and assuming vector meson dominance (VMD) it also leads to good results for the radiative decay of the $a_1$ into pion and photon, and in agreement with the structure proposed in the chiral tensor formulation of radiative decay of axial-vector mesons. The two SU(3) parameters and the mixing angle of $K_{1A}$ and $K_{1B}$ needed to give the physical $K_1(1270)$ and $K_1(1400)$ resonances are also determined.

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