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

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

E. Monnier E. Monnier A. Winhart A. Nappi C. Lazzeroni B. Renk T. Fonseca Martin T. Fonseca Martin M. Holder Mauro Piccini F. Costantini P. L. Frabetti A. Michetti Jacqueline Batley Peter Zahariev Hristov Peter Zahariev Hristov B. Vallage S. Bifani G.m. Pierazzini Vladimir Kekelidze M. Slater M. Szleper Cristina Biino I. Polenkevich J.b. Cheze A. Cotta Ramusino A. A. Maier Luca Fiorini I. Mannelli A. Ceccucci Andrea Bizzeti C. Damiani A. I. Zinchenko P. Rubin P. Rubin M. D. Wood M. Sozzi C. Cheshkov C. Cheshkov E. Imbergamo Massimiliano Fiorini Nicolo Cartiglia A. Peters S. A. Wotton Manfred Jeitler S. Balev M. Martini H. D. Wahl M. Fidecaro A. Gianoli Ivan Mikulec N. Doble U. Moosbrugger Stoyan Stoynev Stoyan Stoynev B. Peyaud L. Dilella Lau Gatignon Nicola Cabibbo Nicola Cabibbo W. Kubischta M. Scarpa G. Anzivino M. Savrie P. Cenci G. Lamanna B. Bloch-devaux D. J. Munday M. Veltri A. Dabrowski S. Goy Lopez G.e. Kalmus M. Shieh M. C. Petrucci J. Derre A. Norton Roland Winston M. De Beer Roberta Arcidiacono C. Cerri M. Wache D. T. Madigozhin S. Giudici M. Behler E. Marinova P. Marouelli G. Neuhofer E. Mazzucato P. F. Dalpiaz Konrad Kleinknecht W. Baldini D.c. Cundy M. Pepe V. Falaleev C. Morales Morales D. Coward D. Coward Mayda Velasco M. Valdata-nappi Marco Clemencic S. Venditti M. Markytan M. Lenti Maulik R. Patel F. Marchetto L. Widhalm G. Ruggiero A. Gonidec G. Collazuol G. Marel Rainer Wanke A. J. Culling E. C. Swallow Fabrizio Petrucci Leander Litov Alan W. Walker N. A. Molokanova K. Eppard Evgueni Goudzovski Evgueni Goudzovski Lucia Masetti Lucia Masetti E. Iacopini R. Fantechi Milene Calvetti H. Dibon Mauro Raggi M. Ziolkowski G. Bocquet Yu. Potrebenikov V. Kozhuharov V. Kozhuharov

subject

Physics Nuclear and High Energy Physics Particle physics 010308 nuclear & particles physics Scattering Monte Carlo method Dalitz plot 01 natural sciences Pion Isospin 0103 physical sciences Quasinormal mode High Energy Physics::Experiment Invariant mass Anomaly (physics)Nuclear Experiment 010306 general physics

description

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.

year	journal	country	edition	language
2010-03-01	Physics Letters B

https://doi.org/10.1016/j.physletb.2010.02.036