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Finocchiaro, G. Lanfranchi, G. Saracino, G. Venanzoni, G. Xu, I. Sfiligoi, J. Lee-Franzini, KLOE collaboration: F. Ambrosino, L. Tortora, M. Antonelli, M. Dreucci, M. Incagli, M.L. Ferrer, M. Martini, M. Moulson, M. Napolitano, M. Palutan, M. Primavera, M. Testa, P. Beltrame, P. Branchini, P. Campana, P. Ciambrone, P. De Simone, P. Franzini, P. Gauzzi, P. Massarotti, P. Santangelo, P. Valente, R. Caloi, R. Versaci, S. Bertolucci, S. Bocchetta, S. Chi, S. Di Falco, S. Fiore, S. Giovannella, S. Meola, S. Miscetti, S. M\\\"uller, T. Capussela, T. Spadaro, V. Bocci, V. Kulikov, V. Patera, W. Kluge, W. Mei","submitted_at":"2007-07-27T15:24:14Z","abstract_excerpt":"We report a preliminary measurement of the slope parameter $\\alpha$ for the $\\eta\\to 3\\piz$ decay carried out with KLOE at DA$\\Phi$NE; where $\\alpha$ is the parameter describing the energy dependence of the square of the matrix element for this decay. By fitting the event density in the Dalitz plot with a collected statistic of 420 pb$^{-1}$ we determine $\\alpha = -0.027 \\pm 0.004 (stat) ^{+0.004}_{-0.006} (syst)$. 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Kulikov, V. Patera, W. Kluge, W. Mei","submitted_at":"2007-07-27T15:24:14Z","abstract_excerpt":"We report a preliminary measurement of the slope parameter $\\alpha$ for the $\\eta\\to 3\\piz$ decay carried out with KLOE at DA$\\Phi$NE; where $\\alpha$ is the parameter describing the energy dependence of the square of the matrix element for this decay. By fitting the event density in the Dalitz plot with a collected statistic of 420 pb$^{-1}$ we determine $\\alpha = -0.027 \\pm 0.004 (stat) ^{+0.004}_{-0.006} (syst)$. 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