First observation and study of the $K^{\pm} \rightarrow \pi^{0} \pi^{0} \mu^{\pm} \nu$ decay

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$^{2}$...

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Published in:	The journal of high energy physics Vol. 3
Main Authors:	Batley, John Richard, Kalmus, George, Lazzeroni, Cristina, Munday, David John, Slater, Mark W, Wotton, Stephen A, Arcidiacono, Roberta, Bocquet, Ginette, Cabibbo, Nicola, Ceccucci, Augusto, Cundy, Donald, Falaleev, Valeri, Fidecaro, Maria, Gatignon, Lau, Gonidec, Allain, Kubischta, Werner, Maier, Andrew, Norton, Alan, Patel, Mitesh, Peters, Andreas Joachim, Potrebenikov, Yuri, Monnier, Emmanuel, Swallow, Earl, Winston, Roland, Rubin, Philip David, Walker, Alan, Dalpiaz, Pietro, Damiani, Chiara, Fiorini, Massimiliano, Martini, Mara, Petrucci, Ferruccio, Savrié, Mauro, Scarpa, Marcella, Wahl, Heinrich, Baldini, Wander, Cotta Ramusino, Angelo, Gianoli, Alberto, Calvetti, Mario, Celeghini, Enrico, Iacopini, Enrico, Lenti, Massimo, Ruggiero, Giuseppe, Bizzeti, Andrea, Veltri, Michele, Behler, Matthias, Eppard, Kirsten, Hita-Hochgesand, Manuel, Kleinknecht, Konrad, Marouelli, Peter, Masetti, Lucia, Moosbrugger, Ulrich, Morales Morales, Cristina, Renk, Burkhard, Wache, Martin, Wanke, Rainer, Winhart, Andreas, Coward, David, Dabrowski, Anne, Fonseca Martin, Teresa, Shieh, Michal, Szleper, Michal, Velasco, Mayda, Wood, Matthew D, Anzivino, Giuseppina, Imbergamo, Ermanno, Nappi, Aniello, Piccini, Mauro, Raggi, Mauro, Valdata-Nappi, Marisa, Cenci, Patrizia, Pepe, Monica, Petrucci, Maria Cristina, Costantini, Flavio, Doble, Niels, Fiorini, Luca, Giudici, Sergio, Pierazzini, Giuseppe, Sozzi, Marco, Venditti, Stefano, Collazuol, Gianmaria, Di Lella, Luigi, Lamanna, Gianluca, Mannelli, Italo, Michetti, Andrea, Cerri, Claudio, Fantechi, Riccardo, Bloch-Devaux, Brigitte, Cheshkov, Cvetan, Chèze, Jean-Baptiste, de Beer, Michel, Derré, Jacques, Marel, Gerard, Mazzucato, Eduardo, Peyaud, Bernard, Vallage, Bertrand, Holder, Martin, Ziolkowski, Michal, Bifani, Simone, Clemencic, Marco, Goy Lopez, Silvia
Format:	Journal Article
Language:	English
Published:	Springer 2024
Subjects:	High Energy Physics - Experiment Physics dilepton, mass NA48 branching ratio rare decay Branching fraction background perturbation theory, chiral kinematics GeV Fixed Target Experiments CERN Lab
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