A measurement of the K + → π + μ + μ − decay

Cortina Gil, E. and Kleimenova, A. and Minucci, E. and Padolski, S. and Petrov, P. and Shaikhiev, A. and Volpe, R. and Numao, T. and Petrov, Y. and Velghe, B. and Wong, V. W. S. and Bryman, D. and Fu, J. and Husek, T. and Jerhot, J. and Kampf, K. and Zamkovsky, M. and Aliberti, R. and Khoriauli, G. and Kunze, J. and Lomidze, D. and Peruzzo, L. and Vormstein, M. and Wanke, R. and Dalpiaz, P. and Fiorini, M. and Neri, I. and Norton, A. and Petrucci, F. and Wahl, H. and Cotta Ramusino, A. and Gianoli, A. and Iacopini, E. and Latino, G. and Lenti, M. and Parenti, A. and Bizzeti, A. and Bucci, F. and Antonelli, A. and Georgiev, G. and Kozhuharov, V. and Lanfranchi, G. and Martellotti, S. and Moulson, M. and Spadaro, T. and Tinti, G. and Ambrosino, F. and Capussela, T. and Corvino, M. and Di Filippo, D. and Fiorenza, R. and Massarotti, P. and Mirra, M. and Napolitano, M. and Saracino, G. and Anzivino, G. and Brizioli, F. and Imbergamo, E. and Lollini, R. and Piandani, R. and Santoni, C. and Barbanera, M. and Cenci, P. and Checcucci, B. and Lubrano, P. and Lupi, M. and Pepe, M. and Piccini, M. and Costantini, F. and Di Lella, L. and Doble, N. and Giorgi, M. and Giudici, S. and Lamanna, G. and Lari, E. and Pedreschi, E. and Sozzi, M. and Cerri, C. and Fantechi, R. and Pontisso, L. and Spinella, F. and Mannelli, I. and D’Agostini, G. and Raggi, M. and Biagioni, A. and Cretaro, P. and Frezza, O. and Leonardi, E. and Lonardo, A. and Turisini, M. and Valente, P. and Vicini, P. and Ammendola, R. and Bonaiuto, V. and Fucci, A. and Salamon, A. and Sargeni, F. and Arcidiacono, R. and Bloch-Devaux, B. and Boretto, M. and Menichetti, E. and Migliore, E. and Soldi, D. and Biino, C. and Filippi, A. and Marchetto, F. and Engelfried, J. and Estrada-Tristan, N. and Bragadireanu, A. M. and Ghinescu, S. A. and Hutanu, O. E. and Baeva, A. and Baigarashev, D. and Emelyanov, D. and Enik, T. and Falaleev, V. and Kekelidze, V. and Korotkova, A. and Litov, L. and Madigozhin, D. and Misheva, M. and Molokanova, N. and Movchan, S. and Polenkevich, I. and Potrebenikov, Yu. and Shkarovskiy, S. and Zinchenko, A. and Fedotov, S. and Gushchin, E. and Khotyantsev, A. and Kudenko, Y. and Kurochka, V. and Medvedeva, M. and Mefodev, A. and Kholodenko, S. and Kurshetsov, V. and Obraztsov, V. and Ostankov, A. and Semenov, V. and Sugonyaev, V. and Yushchenko, O. and Bician, L. and Blazek, T. and Cerny, V. and Kucerova, Z. and Bernhard, J. and Ceccucci, A. and Danielsson, H. and De Simone, N. and Duval, F. and Döbrich, B. and Federici, L. and Gamberini, E. and Gatignon, L. and Guida, R. and Hahn, F. and Holzer, E. B. and Jenninger, B. and Koval, M. and Laycock, P. and Lehmann Miotto, G. and Lichard, P. and Mapelli, A. and Marchevski, R. and Massri, K. and Noy, M. and Palladino, V. and Perrin-Terrin, M. and Pinzino, J. and Ryjov, V. and Schuchmann, S. and Venditti, S. and Bache, T. and Brunetti, M. B. and Duk, V. and Fascianelli, V. and Fry, J. R. and Gonnella, F. and Goudzovski, E. and Henshaw, J. and Iacobuzio, L. and Lazzeroni, C. and Lurkin, N. and Newson, F. and Parkinson, C. and Romano, A. and Sergi, A. and Sturgess, A. and Swallow, J. and Tomczak, A. and Heath, H. and Page, R. and Trilov, S. and Angelucci, B. and Britton, D. and Graham, C. and Protopopescu, D. and Carmignani, J. and Dainton, J. B. and Jones, R. W. L. and Ruggiero, G. and Fulton, L. and Hutchcroft, D. and Maurice, E. and Wrona, B. and Conovaloff, A. and Cooper, P. and Coward, D. and Rubin, P. (2022) A measurement of the K + → π + μ + μ − decay. Journal of High Energy Physics, 2022 (11): 11. ISSN 1029-8479

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A sample of 2.8 × 104K+ → π+μ+μ− candidates with negligible background was collected by the NA62 experiment at the CERN SPS in 2017–2018. The model-independent branching fraction is measured to be (9.15 ± 0.08) × 10−8, a factor three more precise than previous measurements. The decay form factor is presented as a function of the squared dimuon mass. A measurement of the form factor parameters and their uncertainties is performed using a description based on Chiral Perturbation Theory at O(p6).

Item Type:
Journal Article
Journal or Publication Title:
Journal of High Energy Physics
Uncontrolled Keywords:
?? regular article - experimental physicsbranching fractionfixed target experimentsflavour changing neutral currentsrare decaynuclear and high energy physics ??
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Deposited On:
29 Nov 2022 15:55
Last Modified:
21 Feb 2024 01:04