The resonant structure of the reaction is studied using data from of integrated luminosity collected by the LHCb experiment, one third at 7 TeV center-of-mass energy and the remainder at 8 TeV. The invariant mass of the pair and three decay angular distributions are used to determine the fractions of the resonant and nonresonant components. Six interfering states, , , , , and , are required to give a good description of invariant mass spectra and decay angular distributions. The positive and negative charge parity fractions of each of the resonant final states are determined. The meson is not seen and the upper limit on its presence, compared with the observed rate, is inconsistent with a model where these scalar mesons are formed from two quarks and two antiquarks (tetraquarks) at the eight standard deviation level. In the model, the absolute value of the mixing angle between the and the scalar mesons is limited to be less than 17° at 90% confidence level.