Empirical parameterization of the K+- -> pi+- pi0 pi0 decay Dalitz plot

J.R. Batley , A.J. Culling , G. Kalmus , C. Lazzeroni , D.J. Munday , M.W. Slater , S.A. Wotton , R. Arcidiacono

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G. Bocquet N. Cabibbo A. Ceccucci D. Cundy V. Falaleev M. Fidecaro L. Gatignon A. Gonidec W. Kubischta A. Norton A. Maier M. Patel A. Peters S. Balev P.L. Frabetti E. Goudzovski P. Hristov V. Kekelidze V. Kozhuharov L. Litov D. Madigozhin E. Marinova N. Molokanova I. Polenkevich Yu. Potrebenikov S. Stoynev A. Zinchenko E. Monnier E. Swallow R. Winston P. Rubin A. Walker W. Baldini A. Cotta Ramusino P. Dalpiaz C. Damiani M. Fiorini A. Gianoli M. Martini F. Petrucci M. Savri\'e M. Scarpa H. Wahl M. Calvetti E. Iacopini G. Ruggiero A. Bizzeti M. Lenti M. Veltri M. Behler K. Eppard K. Kleinknecht P. Marouelli L. Masetti U. Moosbrugger C. Morales Morales B. Renk M. Wache R. Wanke A. Winhart D. Coward A. Dabrowski T. Fonseca Martin M. Shieh M. Szleper M. Velasco M.D. Wood G. Anzivino E. Imbergamo A. Nappi M. Piccini M. Raggi M. Valdata-Nappi P. Cenci M. Pepe M.C. Petrucci C. Cerri R. Fantechi G. Collazuol L. DiLella G. Lamanna I. Mannelli A. Michetti F. Costantini N. Doble L. Fiorini S. Giudici G. Pierazzini M. Sozzi S. Venditti B. Bloch-Devaux C. Cheshkov J.B. Ch\`eze M. De Beer J. Derr\'e G. Marel E. Mazzucato B. Peyaud B. Vallage M. Holder M. Ziolkowski C. Biino N. Cartiglia F. Marchetto S. Bifani M. Clemencic S. Goy Lopez H. Dibon M. Jeitler M. Markytan I. Mikulec G. Neuhofer L. Widhalm

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classification ✦ hep-ex

keywords decaydalitzempiricalmassparameterizationplotanalysisanomaly

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As first observed by the NA48/2 experiment at the CERN SPS, the $\p0p0$ invariant mass (M00) distribution from $\kcnn$ decay shows a cusp-like anomaly at M00=2m+, where m+ is the charged pion mass. An analysis to extract the pi pi scattering lengths in the isospin I=0 and I=2 states, a0 and a2, respectively, has been recently reported. In the present work the Dalitz plot of this decay is fitted to a new empirical parameterization suitable for practical purposes, such as Monte Carlo simulations of K+- -> pi+- pi0 pi0 decays.

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Empirical parameterization of the K+- -> pi+- pi0 pi0 decay Dalitz plot

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