@Article{Aceti_etal2016,
author="Aceti, F.
and Dai, L. R.
and Oset, E.",
title="a(1)(1420) peak as the pi f(0)(980) decay mode of the a(1)(1260)",
journal="Physical Review D",
year="2016",
publisher="Amer Physical Soc",
volume="94",
number="9",
pages="096015--9pp",
abstract="We study the decay mode of the a(1)(1260) into a pi(+) in p wave and the f(0)(980) that decays into pi(+)pi(-) in s wave. The mechanism proceeds via a triangular mechanism where the a(1)(1260) decays into K*K-, the K* decays to an external pi(+) and an internal K that fuses with the (K) over bar producing the f(0)(980) resonance. The mechanism develops a singularity at a mass of the a(1)(1260) around 1420 MeV, producing a peak in the cross section of the pp reaction, used to generate the mesonic final state, which provides a natural explanation of all the features observed in the COMPASS experiment, where a peak observed at this energy is tentatively associated to a new resonance called a(1)(1420). On the other hand, the triangular singularity studied here gives rise to a remarkable feature, where a peak is seen for a certain decay channel of a resonance at an energy about 200 MeV higher than its nominal mass.",
optnote="WOS:000388824300007",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2912), last updated on Thu, 02 Feb 2017 09:20:23 +0000",
issn="2470-0010",
doi="10.1103/PhysRevD.94.096015",
opturl="http://arxiv.org/abs/1606.06893",
opturl="https://doi.org/10.1103/PhysRevD.94.096015",
archivePrefix="arXiv",
eprint="1606.06893",
language="English"
}