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18 April 2024

» arxiv » 1601.8014

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ChPT tests at the NA48 and NA62 experiments at CERN
NA48/2 ; NA62 Collaborations ; F. Ambrosino ; A. Antonelli ; G. Anzivino ; R. Arcidiacono ; W. Baldini ; S. Balev ; J.R. Batley ; M. Behler ; S. Bifani ; C. Biino ; A. Bizzeti ; B. Bloch-Devaux ; G. Bocquet ; V. Bolotov ; F. Bucci ; N. Cabibbo ; M. Calvetti ; N. Cartiglia ; A. Ceccucci ; P. Cenci ; C. Cerri ; C. Cheshkov ; J.B. Chèze ; M. Clemencic ; G. Collazuol ; F. Costantini ; A. Cotta Ramusino ; D. Coward ; D. Cundy ; A. Dabrowski ; G. D'Agostini ; P. Dalpiaz ; C. Damiani ; H. Danielsson ; M. De Beer ; G. Dellacasa ; J. Derré ; H. Dibon ; D. Di Filippo ; L. DiLella ; N. Doble ; V. Duk ; J. Engelfried ; K. Eppard ; V. Falaleev ; R. Fantechi ; M. Fidecaro ; L. Fiorini ; M. Fiorini ; T. Fonseca Martin ; P.L. Frabetti ; A. Fucci ; S. Gallorini ; L. Gatignon ; E. Gersabeck ; A. Gianoli ; S. Giudici ; A. Gonidec ; E. Goudzovski ; S. Goy Lopez ; E. Gushchin ; B. Hallgren ; M. Hita-Hochgesand ; M. Holder ; P. Hristov ; E. Iacopini ; E. Imbergamo ; M. Jeitler ; G. Kalmus ; V. Kekelidze ; K. Kleinknecht ; V. Kozhuharov ; W. Kubischta ; V. Kurshetsov ; G. Lamanna ; C. Lazzeroni ; M. Lenti ; E. Leonardi ; L. Litov ; D. Madigozhin ; A. Maier ; I. Mannelli ; F. Marchetto ; G. Marel ; M. Markytan ; P. Marouelli ; M. Martini ; L. Masetti ; P. Massarotti ; E. Mazzucato ; A. Michetti ; I. Mikulec ; M. Misheva ; N. Molokanova ; E. Monnier ; U. Moosbrugger ; C. Morales Morales ; M. Moulson ; S. Movchan ; D.J. Munday ; M. Napolitano ; A. Nappi ; G. Neuhofer ; A. Norton ; T. Numao ; V. Obraztsov ; V. Palladino ; M. Patel ; M. Pepe ; A. Peters ; F. Petrucci ; M.C. Petrucci ; B. Peyaud ; R. Piandani ; M. Piccini ; G. Pierazzini ; I. Polenkevich ; I. Popov ; Yu. Potrebenikov ; M. Raggi ; B. Renk ; F. Retière ; P. Riedler ; A. Romano ; P. Rubin ; G. Ruggiero ; A. Salamon ; G. Saracino ; M. Savrié ; M. Scarpa ; V. Semenov ; A. Sergi ; M. Serra ; M. Shieh ; S. Shkarovskiy ; M.W. Slater ; M. Sozzi ; T. Spadaro ; S. Stoynev ; E. Swallow ; M. Szleper ; M. Valdata-Nappi ; P. Valente ; B. Vallage ; M. Velasco ; M. Veltri ; S. Venditti ; M. Wache ; H. Wahl ; A. Walker ; R. Wanke ; L. Widhalm ; A. Winhart ; R. Winston ; M.D. Wood ; S.A. Wotton ; O. Yushchenko ; A. Zinchenko ; M. Ziolkowski ;
Date:	29 Jan 2016
Abstract:	The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ($K^pm o pi^+ pi^- e^pm u$) and Ke4(00) ($K^pm o pi^0 pi^0 e^pm u$) with nearly one percent background contamination. The detailed study of form factors and branching rates, based on these data, has been completed recently. The results brings new inputs to low energy strong interactions description and tests of Chiral Perturbation Theory (ChPT) and lattice QCD calculations. In particular, new data support the ChPT prediction for a cusp in the $pi^0pi^0$ invariant mass spectrum at the two charged pions threshold for Ke4(00) decay. New final results from an analysis of about 400 $K^pm o pi^pm gamma gamma$ rare decay candidates collected by the NA48/2 and NA62 experiments at CERN during low intensity runs with minimum bias trigger configurations are presented. The results include a model-independent decay rate measurement and fits to ChPT description.
Source:	arXiv, 1601.8014
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