%0 Journal Article
%T Discerning the two K-1 (1270) poles in D-0 -> pi(+) VP decay
%A Wang, G. Y.
%A Roca, L.
%A Oset, E.
%J Physical Review D
%D 2019
%V 100
%N 7
%I Amer Physical Soc
%@ 2470-0010
%G English
%F Wang_etal2019
%O WOS:000490752100003
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=4182), last updated on Wed, 30 Oct 2019 08:32:49 +0000
%X Within the chiral unitary approach, the axial-vector resonance K-1 (1270) has been predicted to manifest a two-pole nature. The lowest pole has a mass of 1195 MeV and a width of 246 MeV and couples mostly to K*pi, and the highest pole has a mass of 1284 MeV and a width of 146 MeV and couples mostly to rho K. We analyze theoretically how this double-pole structure can show up in D-0 -> pi+VP decays by looking at the vector-pseudoscalar (VP) invariant mass distribution for different VP channels, exploiting the fact that each pole couples differently to different VP pairs. We find that the final (K) over bar*pi and rho(K) over tilde channels are sensible to the different poles of the K-1 (1270) resonance and hence are suitable reactions to analyze experimentally the double-pole nature of this resonance.
%R 10.1103/PhysRevD.100.074018
%U https://arxiv.org/abs/1907.09188
%U https://doi.org/10.1103/PhysRevD.100.074018
%P 074018-10pp