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Observation of the Resonant Character of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>Z</mml:mi><mml:mo stretchy="false">(</mml:mo><mml:mn>4430</mml:mn><mml:msup><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mo>โ</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>State
Resonant structures in B^{0}โฯ^{'}ฯ^{-}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^{+}ฯ^{-} resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)^{-}โฯ^{'}ฯ^{-} component โฆ