TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Ruiz Valls, P.
AU  - Sanchez Mayordomo, C.
PY  - 2014
DA  - 2014//
TI  - Observation of the Resonant Character of the Z(4430)(-) State
T2  - Phys. Rev. Lett.
JO  - Physical Review Letters
SP  - 222002
EP  - 9pp
VL  - 112
IS  - 22
PB  - Amer Physical Soc
AB  - 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(+).
SN  - 0031-9007
UR  - http://arxiv.org/abs/1404.1903
UR  - https://doi.org/10.1103/PhysRevLett.112.222002
DO  - 10.1103/PhysRevLett.112.222002
LA  - English
N1  - WOS:000336920800007
ID  - LHCbCollaborationAaij_etal2014
ER  -