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Empirical parameterization of the K±→π±π0π0 decay Dalitz plot

J.R. Batley A.J. Culling G. Kalmus C. Lazzeroni D.J. Munday M.W. Slater S.A. Wotton R. Arcidiacono 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. Peter S. Balevc P.L. Frabetti E. Goudzovskic P. Hristov V. Kekelidze V. Kozhuharov L. Litov D. Madigozhin E. Marinova N. Molokanova I. Polenkevich Yu. Potrebenikov S. Stoynevc A. Zinchenko E. Monnier 1 E. Swallo R. Winston P. Rubin A. Walker W. Baldini A. Cotta Ramusino P. Dalpiaz C. Damiani M. Fiorini A. Gianolif M. Martini F. Petrucci M. Savrié M. Scarpa H. Wahl M. Calvetti E. Iacopini G. Ruggiero A. Bizzeti M. Lenti M. Veltri M. Behler K. Eppard K. Kleinknech 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. Cerrin R. Fantechi G. Collazuol L. Dilella G. Lamanna I. Mannelli A. Michetti F. Costantini N. Doble L. Fiorinin S. Giudici G. Pierazzini M. Sozzi S. Venditti B. Bloch-Devaux J.B. Chèze 2 M. de Beer 2 J. Derré 2 G. Marel 2 E. Mazzucato 2 B. Peyaud 2 B. Vallage 2 M. Holder M. Ziolkowski C. Biino N. Cartiglia F. Marchetto S. Bifani M. Clemencics S. Goy Lopez H. Dibon M. Jeitler M. Markytan I. Mikulec G. Neuhofe L. Widhalmu
Abstract : As first observed by the NA48/2 experiment at the CERN SPS, the π0π0 invariant mass (M00) distribution from K±→π±π0π0 decay shows a cusp-like anomaly at M00=2m+, where m+ is the charged pion mass. An analysis to extract the ππ 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±→π±π0π0 decays.
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Submitted on : Monday, March 22, 2010 - 11:45:11 AM
Last modification on : Tuesday, March 30, 2021 - 3:17:41 AM

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J.R. Batley, A.J. Culling, G. Kalmus, C. Lazzeroni, D.J. Munday, et al.. Empirical parameterization of the K±→π±π0π0 decay Dalitz plot. Physics Letters B, Elsevier, 2010, 686, pp.101-108. ⟨10.1016/j.physletb.2010.02.036⟩. ⟨in2p3-00462574⟩

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