| Title: |
First observation and study of the $K^{\pm} \rightarrow \pi^{0} \pi^{0} \mu^{\pm} \nu$ decay |
| Authors: |
Anzivino, Giuseppina; Arcidiacono, Roberta; Baldini, Wander; Balev, Spasimir; Batley, Richard; Behler, Matthias; Biino, Cristina; Bizzeti, Andrea; Bloch-Devaux, Brigitte; Bocquet, Ginette; Cabibbo, Nicola; Calvetti, M.; Cartiglia, Nicolo; Ceccucci, Augusto; Celeghini, Enrico; Cenci, Patrizia; Cerri, Claudio; Cheshkov, Cvetan; Chèze, Jean-Baptiste; Clemencic, Marco; Collazuol, Gianmaria; Costantini, Flavio; Cotta Ramusino, Angelo; Coward, David; Cundy, Donald; Dabrowski, Anne Evelyn; Dalpiaz, Pietro; Damiani, Chiara; De Beer, Michel; Derré, Jacques; Di Lella, Luigi; Dibon, Heinz; Doble, Niels; Eppard, Kirsten; Falaleev, Valeri; Fantechi, Riccardo; Fiorini, Luca; Fiorini, Massimiliano; Fonseca Martin, Teresa; Frabetti, PierLuigi; Gatignon, Lau; Gersabeck, Evelina; Gianoli, Alberto; Giudici, Sergio; Gonidec, Allain; Goudzovski, Evgueni; Goy Lopez, Silvia; Hita-Hochgesand, Manuel; Holder, Martin; Hristov, Peter; Iacopini, Enrico; Imbergamo, Ermanno; Jeitler, Manfred; Kalmus, George; Kekelidze, Vladimir; Kleinknecht, Konrad; Korotkova, Anna; Kozhuharov, Venelin; Kubischta, Werner; Lamanna, Gianluca; Lazzeroni, Cristina; Lenti, Massimo; Litov, Leandar; Madigozhin, Dmitry; Maier, Andrew; Mannelli, Italo; Marchetto, Flavio Pietro; Marel, Gerard; Markytan, Manfred; Marouelli, Peter; Martini, Mara; Masetti, Lucia; Mazzucato, E.; Menichetti, Ezio; Michetti, Andrea; Mikulec, Ivan; Molokanova, Natalia; Monnier, Emmanuel; Moosbrugger, Ulrich; Morales Morales, Cristina; Munday, James; Nappi, Aniello; Neuhofer, Gunther; Norton, Alan; Patel, Mayur; Pepe, Monica; Peters, Andreas-Joachim; Petrucci, Ferruccio; Petrucci, Maria Cristina; Peyaud, Bernard; Piccini, Mauro; Pierazzini, Giuseppe; Polenkevich, Irina; Potrebenikov, Yury; Raggi, Mauro; Renk, Burkhard; Rubin, Philip; Ruggiero, Giuseppe; Savrie', Mauro; Scarpa, Marcella; Shieh, Michal; Slater, Mark; Sozzi, Marco; Stoynev, Stoyan; Swallow, Earl; Szleper, Michał; Valdata-Nappi, Marisa; Vallage, B.; Velasco, Mayda; Veltri, Michele; Venditti, S.; Wache, Martin; Wahl, Heinrich; Walker, Alan; Wanke, Rainer; Widhalm, Laurenz; Winhart, Andreas; Winston, Roland; Wood, Matthew D.; Wotton, Stephen; Zinchenko, Alexander; Ziolkowski, Michael |
| Publisher Information: |
Springer |
| Publication Year: |
2024 |
| Collection: |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
| Subject Terms: |
Branching fraction; Fixed Target Experiments; Rare Decay; K: secondary beam; dilepton: mass spectrum; perturbation theory: chiral; K: branching ratio: measured; K: semileptonic decay; kinematics; NA48; CERN SPS; K: rare decay; CERN Lab; background; experimental results; K+ --> 2pi0 muon+ neutrino/mu; K- --> 2pi0 muon- neutrino/mu; S010.124; High Energy Physics - Experiment |
| Description: |
The NA48/2 experiment at CERN reports the first observation of the K$^{±}$ → π$^{0}$π$^{0}$μ$^{±}$ν decay based on a sample of 2437 candidates with 15% background contamination collected in 2003–2004. The decay branching ratio in the kinematic region of the squared dilepton mass above 0.03 GeV$^{2}$/c$^{4}$ is measured to be (0.65 ± 0.03) × 10$^{−6}$. The extrapolation to the full kinematic space, using a specific model, is found to be (3.45 ± 0.16) × 10$^{−6}$, in agreement with chiral perturbation theory predictions. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://arxiv.org/pdf/2310.20295; https://www.openaccessrepository.it/communities/inspire-hep; https://doi.org/10.1007/JHEP03(2024)137; https://inspirehep.net/literature/2773162 |
| DOI: |
10.1007/JHEP03(2024)137 |
| Availability: |
https://doi.org/10.1007/JHEP03(2024)137; https://inspirehep.net/literature/2773162 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.35EC751 |
| Database: |
BASE |