%0 Journal Article
%T Observation of the Resonant Character of the Z(4430)(-) State
%A LHCb Collaboration (Aaij, R. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%A Ruiz Valls, P.
%A Sanchez Mayordomo, C.
%J Physical Review Letters
%D 2014
%V 112
%N 22
%I Amer Physical Soc
%@ 0031-9007
%G English
%F LHCbCollaborationAaij_etal2014
%O WOS:000336920800007
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=1815), last updated on Mon, 22 Sep 2014 13:09:54 +0000
%X Resonant structures in B-0 -> psi'pi K--(+) decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3 fb(-1) collected with the LHCb detector. The data cannot be described with K+pi(-) resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)(-) -> psi'pi(-) component is required, thus confirming the existence of this state. The observed evolution of the Z(4430)(-) amplitude with the psi'pi(-) mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1(+).
%R 10.1103/PhysRevLett.112.222002
%U http://arxiv.org/abs/1404.1903
%U https://doi.org/10.1103/PhysRevLett.112.222002
%P 222002-9pp