PT Journal
AU Chen, YH
   Yao, DL
   Zheng, HQ
TI A Study of rho-omega Mixing in Resonance Chiral Theory
SO Communications in Theoretical Physics
JI Commun. Theor. Phys.
PY 2018
BP 50
EP 58
VL 69
IS 1
DI 10.1088/0253-6102/69/1/50
LA English
DE Chiral Lagrangians; vector mesons; 1/N-C expansion
AB The strong and electromagnetic corrections to rho-omega mixing are calculated using an SU(2) version of resonance chiral theory up to next-to-leading orders in 1/N-C expansion, respectively. Up to our accuracy, the effect of the momentum dependence of rho-omega mixing is incorporated due to the inclusion of loop contributions. We analyze the impact of rho-omega mixing on the pion vector form factor by performing numerical fit to the data extracted from e(+)e(-) -> pi(+)pi(-) and tau -> nu(tau)2 pi, while the decay width of omega -> pi(+)pi(-) is taken into account as a constraint. It is found that the momentum dependence is significant in a good description of the experimental data. In addition, based on the fitted values of the involved parameters, we analyze the decay width of omega -> pi(+)pi(-), which turns out to be highly dominated by the rho-omega mixing effect.
ER