TY  - JOUR
AU  - Dai, L. Y.
AU  - Kang, X. W.
AU  - Meissner, U. G.
AU  - Song, X. Y.
AU  - Yao, D. L.
PY  - 2018
DA  - 2018//
TI  - Amplitude analysis of the anomalous decay eta ' -> pi(+) pi(-) gamma
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 036012
EP  - 12pp
VL  - 97
IS  - 3
PB  - Amer Physical Soc
AB  - In this paper we perform an amplitude analysis of eta ' -> pi(+)pi(-)gamma and confront it with the latest BESIII data. Based on the final-state interaction theorem, we represent the amplitude in terms of an Omnes function multiplied by a form factor that corresponds to the contributions from left-hand cuts and right-hand cuts in the inelastic channels. We also take into account the isospin violation effect induced by rho-omega mixing. Our results show that the anomaly contribution is mandatory in order to explain the data. Its contribution to the decay width of Gamma(eta ' -> pi pi gamma) is larger than that induced by isospin violation. Finally we extract the pole positions of the rho and omega as well as their corresponding residues.
SN  - 2470-0010
UR  - http://arxiv.org/abs/1712.02119
UR  - https://doi.org/10.1103/PhysRevD.97.036012
DO  - 10.1103/PhysRevD.97.036012
LA  - English
N1  - WOS:000424904000003
ID  - Dai_etal2018
ER  -