{"paper":{"title":"ChPT tests at the NA48 and NA62 experiments at CERN","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Antonelli, A. Bizzeti, A. Ceccucci, A. Cotta Ramusino, A. Dabrowski, A. Fucci, A. Gianoli, A. Gonidec, A. Maier, A. Michetti, A. Nappi, A. Norton, A. Peters, A. Romano, A. Salamon, A. Sergi, A. Walker, A. Winhart, A. Zinchenko, B. Bloch-Devaux, B. Hallgren, B. Peyaud, B. Renk, B. Vallage, C. Biino, C. Cerri, C. Cheshkov, C. Damiani, C. Lazzeroni, C. Morales Morales, D. Coward, D. Cundy, D. Di Filippo, D.J. Munday, D. Madigozhin, E. Gersabeck, E. Goudzovski, E. Gushchin, E. Iacopini, E. Imbergamo, E. Leonardi, E. Mazzucato, E. Monnier, E. Swallow, F. Bucci, F. Costantini, F. Marchetto, F. Petrucci, F. Reti\\`ere, G. Anzivino, G. Bocquet, G. Collazuol, G. D'Agostini, G. Dellacasa, G. Kalmus, G. Lamanna, G. Marel, G. Neuhofer, G. Pierazzini, G. Ruggiero, G. Saracino, H. Danielsson, H. Dibon, H. Wahl, I. Mannelli, I. Mikulec, I. Polenkevich, I. Popov, J.B. Ch\\`eze, J. Derr\\'e, J. Engelfried, J.R. Batley, K. Eppard, K. Kleinknecht, L. DiLella, L. Fiorini, L. Gatignon, L. Litov, L. Masetti, L. Widhalm, M. Behler, M. Calvetti, M. Clemencic, M.C. Petrucci, M. De Beer, M.D. Wood, M. Fidecaro, M. Fiorini, M. Hita-Hochgesand, M. Holder, M. Jeitler, M. Lenti, M. Markytan, M. Martini, M. Misheva, M. Moulson, M. Napolitano, M. Patel, M. Pepe, M. Piccini, M. Raggi, M. Savri\\'e, M. Scarpa, M. Serra, M. Shieh, M. Sozzi, M. Szleper, M. Valdata-Nappi, M. Velasco, M. Veltri, M. Wache, M.W. Slater, M. Ziolkowski, NA48/2, NA62 Collaborations: F. Ambrosino, N. Cabibbo, N. Cartiglia, N. Doble, N. Molokanova, O. Yushchenko, P. Cenci, P. Dalpiaz, P. Hristov, P.L. Frabetti, P. Marouelli, P. Massarotti, P. Riedler, P. Rubin, P. Valente, R. Arcidiacono, R. Fantechi, R. Piandani, R. Wanke, R. Winston, S.A. Wotton, S. Balev, S. Bifani, S. Gallorini, S. Giudici, S. Goy Lopez, S. Movchan, S. Shkarovskiy, S. Stoynev, S. Venditti, T. Fonseca Martin, T. Numao, T. Spadaro, U. Moosbrugger, V. Bolotov, V. Duk, V. Falaleev, V. Kekelidze, V. Kozhuharov, V. Kurshetsov, V. Obraztsov, V. Palladino, V. Semenov, W. Baldini, W. Kubischta, Yu. Potrebenikov","submitted_at":"2016-01-29T09:37:10Z","abstract_excerpt":"The NA48/2 Collaboration at CERN has accumulated unprecedented statistics of rare kaon decays in the Ke4 modes: Ke4(+-) ($K^\\pm \\to \\pi^+ \\pi^- e^\\pm \\nu$) and Ke4(00) ($K^\\pm \\to \\pi^0 \\pi^0 e^\\pm \\nu$) 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 $\\pi^0\\pi^0$ inva"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1601.08014","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}