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Measurement of the slope parameter \alpha for the \eta\to 3\pi^0 decay at KLOE

Authors :
KLOE collaboration
Ambrosino, F.
Antonelli, A.
Antonelli, M.
Archilli, F.
Bacci, C.
Beltrame, P.
Bencivenni, G.
Bertolucci, S.
Bini, C.
Bloise, C.
Bocchetta, S.
Bocci, V.
Bossi, F.
Branchini, P.
Caloi, R.
Campana, P.
Capon, G.
Capussela, T.
Ceradini, F.
Chi, S.
Chiefari, G.
Ciambrone, P.
De Lucia, E.
De Santis, A.
De Simone, P.
De Zorzi, G.
Denig, A.
Di Domenico, A.
Di Donato, C.
Di Falco, S.
Di Micco, B.
Doria, A.
Dreucci, M.
Felici, G.
Ferrari, A.
Ferrer, M. L.
Finocchiaro, G.
Fiore, S.
Forti, C.
Franzini, P.
Gatti, C.
Gauzzi, P.
Giovannella, S.
Gorini, E.
Graziani, E.
Incagli, M.
Kluge, W.
Kulikov, V.
Lacava, F.
Lanfranchi, G.
Lee-Franzini, J.
Leone, D.
Martini, M.
Massarotti, P.
Mei, W.
Meola, S.
Miscetti, S.
Moulson, M.
Müller, S.
Murtas, F.
Napolitano, M.
Nguyen, F.
Palutan, M.
Pasqualucci, E.
Passeri, A.
Patera, V.
Perfetto, F.
Primavera, M.
Santangelo, P.
Saracino, G.
Sciascia, B.
Sciubba, A.
Scuri, F.
Sfiligoi, I.
Spadaro, T.
Testa, M.
Tortora, L.
Valente, P.
Valeriani, B.
Venanzoni, G.
Versaci, R.
Xu, G.
Publication Year :
2007

Abstract

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 $\alpha = -0.027 \pm 0.004 (stat) ^{+0.004}_{-0.006} (syst)$. This result is consistent with current chiral perturbation theory calculations within the unitary approach.<br />Comment: " Contributed paper to Lepton-Photon 2007 ". 5 pages, 4 figures

Subjects

Subjects :
High Energy Physics - Experiment

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.0707.4137
Document Type :
Working Paper

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