TY  - JOUR
AU  - Molina, R.
AU  - Doring, M.
AU  - Liang, W. H.
AU  - Oset, E.
PY  - 2021
DA  - 2021//
TI  - The pi f(0)(500) decay of the a(1)(1260)
T2  - Eur. Phys. J. C
JO  - European Physical Journal C
SP  - 782
EP  - 9pp
VL  - 81
IS  - 9
PB  - Springer
AB  - We evaluate the a(1)(1260) -> pi sigma(f(0)(500)) decay width from the perspective that the a(1)(1260) resonance is dynamically generated from the pseudoscalar-vector interaction and the sigma arises from the pseudoscalar-pseudoscalar interaction. A triangle mechanism with a(1)(1260) -> p pi followed by rho -> pi pi and a fusion of two pions within the loop to produce the sigma provides the mechanism for this decay under these assumptions for the nature of the two resonances. We obtain widths of the order of 13-22 MeV. Present experimental results differ substantially from each other, suggesting that extra efforts should be devoted to the precise extraction of this important partial decay width, which should provide valuable information on the nature of the axial vector and scalar meson resonances and help clarify the role of the ps channel in recent lattice QCD calculations of the a(1).
SN  - 1434-6044
UR  - https://arxiv.org/abs/2107.07439
UR  - https://doi.org/10.1140/epjc/s10052-021-09574-y
DO  - 10.1140/epjc/s10052-021-09574-y
LA  - English
N1  - WOS:000694246400003
ID  - Molina_etal2021
ER  -