A measurement of the K + → π + μ + μ− decay
Cortina Gil E. Kleimenova A. Minucci E. Padolski S. Petrov P. Shaikhiev A. Volpe R. Numao T. Petrov Y. Velghe B. Wong V.W.S. Bryman D. Fu J. Husek T. Jerhot J. Kampf K. Zamkovsky M. Aliberti R. Khoriauli G. Kunze J. Lomidze D. Peruzzo L. Vormstein M. Wanke R. Dalpiaz P. Fiorini M. Neri I. Norton A. Petrucci F. Wahl H. Cotta Ramusino A. Gianoli A. Iacopini E. Latino G. Lenti M. Parenti A. Bizzeti A. Bucci F. Antonelli A. Georgiev G. Kozhuharov V. Lanfranchi G. Martellotti S. Moulson M. Spadaro T. Tinti G. Ambrosino F. Capussela T. Corvino M. Di Filippo D. Fiorenza R. Massarotti P. Mirra M. Napolitano M. Saracino G. Anzivino G. Brizioli F. Imbergamo E. Lollini R. Piandani R. Santoni C. Barbanera M. Cenci P. Checcucci B. Lubrano P. Lupi M. Pepe M. Piccini M. Costantini F. Di Lella L. Doble N. Giorgi M. Giudici S. Lamanna G. Lari E. Pedreschi E. Sozzi M. Cerri C. Fantechi R. Pontisso L. Spinella F. Mannelli I. D’Agostini G. Raggi M. Biagioni A. Cretaro P. Frezza O. Leonardi E. Lonardo A. Turisini M. Valente P. Vicini P. Ammendola R. Bonaiuto V. Fucci A. Salamon A. Sargeni F. Arcidiacono R. Bloch-Devaux B. Boretto M. Menichetti E. Migliore E. Soldi D. Biino C. Filippi A. Marchetto F. Engelfried J. Estrada-Tristan N. Bragadireanu A.M. Ghinescu S.A. Hutanu O.E. Baeva A. Baigarashev D. Emelyanov D. Enik T. Falaleev V. Kekelidze V. Korotkova A. Litov L. Madigozhin D. Misheva M. Molokanova N. Movchan S. Polenkevich I. Potrebenikov Y. Shkarovskiy S. Zinchenko A. Fedotov S. Gushchin E. Khotyantsev A. Kudenko Y. Kurochka V. Medvedeva M. Mefodev A. Kholodenko S. Kurshetsov V. Obraztsov V. Ostankov A. Semenov V. Sugonyaev V. Yushchenko O. Bician L. Blazek T. Cerny V. Kucerova Z. Bernhard J. Ceccucci A. Danielsson H. De Simone N. Duval F. Döbrich B. Federici L. Gamberini E. Gatignon L. Guida R. Hahn F. Holzer E.B. Jenninger B. Koval M. Laycock P. Lehmann Miotto G. Lichard P. Mapelli A. Marchevski R. Massri K. Noy M. Palladino V. Perrin-Terrin M. Pinzino J. Ryjov V. Schuchmann S. Venditti S. Bache T. Brunetti M.B. Duk V. Fascianelli V. Fry J.R. Gonnella F. Goudzovski E. Henshaw J. Iacobuzio L. Lazzeroni C. Lurkin N. Newson F. Parkinson C. Romano A. Sergi A. Sturgess A. Swallow J. Tomczak A. Heath H. Page R. Trilov S. Angelucci B. Britton D. Graham C. Protopopescu D. Carmignani J. Dainton J.B. Jones R.W.L. Ruggiero G. Fulton L. Hutchcroft D. Maurice E. Wrona B. Conovaloff A. Cooper P. Coward D. Rubin P.
November 2022Springer Science and Business Media Deutschland GmbH
Journal of High Energy Physics
2022#2022Issue 11
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).
Branching fraction , Fixed Target Experiments , Flavour Changing Neutral Currents , Rare Decay
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Université Catholique de Louvain, Louvain-La-Neuve, B-1348, Belgium
TRIUMF, Vancouver, V6T 2A3, BC, Canada
University of British Columbia, Vancouver, V6T 1Z4, BC, Canada
Charles University, Prague 1, 116 36, Czech Republic
Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, Mainz, D-55099, Germany
Dipartimento di Fisica e Scienze della Terra dell’Università e INFN, Sezione di Ferrara, Ferrara, I-44122, Italy
INFN, Sezione di Ferrara, Ferrara, I-44122, Italy
Dipartimento di Fisica e Astronomia dell’Università e INFN, Sezione di Firenze, Sesto Fiorentino, I-50019, Italy
INFN, Sezione di Firenze, Sesto Fiorentino, I-50019, Italy
Laboratori Nazionali di Frascati, Frascati, I-00044, Italy
Dipartimento di Fisica “Ettore Pancini” e INFN, Sezione di Napoli, Napoli, I-80126, Italy
Dipartimento di Fisica e Geologia dell’Università e INFN, Sezione di Perugia, Perugia, I-06100, Italy
INFN, Sezione di Perugia, Perugia, I-06100, Italy
Dipartimento di Fisica dell’Università e INFN, Sezione di Pisa, Pisa, I-56100, Italy
INFN, Sezione di Pisa, Pisa, I-56100, Italy
Scuola Normale Superiore e INFN, Sezione di Pisa, Pisa, I-56100, Italy
Dipartimento di Fisica, Sapienza Università di Roma e INFN, Sezione di Roma I, Roma, I-00185, Italy
INFN, Sezione di Roma I, Roma, I-00185, Italy
INFN, Sezione di Roma Tor Vergata, Roma, I-00133, Italy
Dipartimento di Fisica dell’Università e INFN, Sezione di Torino, Torino, I-10125, Italy
INFN, Sezione di Torino, Torino, I-10125, Italy
Instituto de Física, Universidad Autónoma de San Luis Potosí, San Luis Potosí, 78240, Mexico
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering, Bucharest-Magurele, 077125, Romania
Joint Institute for Nuclear Research, Dubna (MO), 141980, Russian Federation
Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, 117312, Russian Federation
Institute for High Energy Physics of the Russian Federation, State Research Center “Kurchatov Institute”, Protvino (MO), 142281, Russian Federation
Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, 842 48, Slovakia
CERN, European Organization for Nuclear Research, Geneva 23, CH-1211, Switzerland
School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
School of Physics, University of Bristol, Bristol, BS8 1TH, United Kingdom
School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom
Faculty of Science and Technology, University of Lancaster, Lancaster, LA1 4YW, United Kingdom
School of Physical Sciences, University of Liverpool, Liverpool, L69 7ZE, United Kingdom
Physics and Astronomy Department, George Mason University, Fairfax, 22030, VA, United States
Brookhaven National Laboratory, Upton, 11973, NY, United States
Department of Astronomy and Theoretical Physics, Lund University, Lund, SE 223-62, Sweden
Institut für Kernphysik and Helmholtz Institute Mainz, Universität Mainz, Mainz, D-55099, Germany
Universität Würzburg, Würzburg, D-97070, Germany
European XFEL GmbH, Hamburg, D-22761, Germany
Dipartimento di Scienze Fisiche, Informatiche e Matematiche, Università di Modena e Reggio Emilia, Modena, I-41125, Italy
Faculty of Physics, University of Sofia, Sofia, BG-1164, Bulgaria
Scuola Superiore Meridionale e INFN, Sezione di Napoli, Napoli, I-80138, Italy
Institut am Fachbereich Informatik und Mathematik, Goethe Universität, Frankfurt am Main, D-60323, Germany
Department of Industrial Engineering, University of Roma Tor Vergata, Roma, I-00173, Italy
Department of Electronic Engineering, University of Roma Tor Vergata, Roma, I-00173, Italy
Università degli Studi del Piemonte Orientale, Vercelli, I-13100, Italy
Universidad de Guanajuato, Guanajuato, 36000, Mexico
L.N. Gumilyov Eurasian National University, Nur-Sultan, 010000, Kazakhstan
Institute of Nuclear Research and Nuclear Energy of Bulgarian Academy of Science (INRNE-BAS), Sofia, BG-1784, Bulgaria
National Research Nuclear University (MEPhI), 115409 Moscow and Moscow Institute of Physics and Technology, 141701 Moscow region, Moscow, Russian Federation
DESY, Zeuthen, D-15738, Germany
Weizmann Institute, Rehovot, 76100, Israel
Aix Marseille University, CNRS/IN2P3, CPPM, Marseille, F-13288, France
Department of Physics, University of Warwick, Coventry, CV4 7AL, United Kingdom
Center for theoretical neuroscience, Columbia University, New York, 10027, NY, United States
Dipartimento di Fisica dell’Università e INFN, Sezione di Genova, Genova, I-16146, Italy
Laboratoire Leprince Ringuet, Palaiseau, F-91120, France
SLAC National Accelerator Laboratory, Stanford University, Menlo Park, 94025, CA, United States
Université Catholique de Louvain
TRIUMF
University of British Columbia
Charles University
Institut für Physik and PRISMA Cluster of Excellence
Dipartimento di Fisica e Scienze della Terra dell’Università e INFN
INFN
Dipartimento di Fisica e Astronomia dell’Università e INFN
INFN
Laboratori Nazionali di Frascati
Dipartimento di Fisica “Ettore Pancini” e INFN
Dipartimento di Fisica e Geologia dell’Università e INFN
INFN
Dipartimento di Fisica dell’Università e INFN
INFN
Scuola Normale Superiore e INFN
Dipartimento di Fisica
INFN
INFN
Dipartimento di Fisica dell’Università e INFN
INFN
Instituto de Física
Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering
Joint Institute for Nuclear Research
Institute for Nuclear Research of the Russian Academy of Sciences
Institute for High Energy Physics of the Russian Federation
Faculty of Mathematics
CERN
School of Physics and Astronomy
School of Physics
School of Physics and Astronomy
Faculty of Science and Technology
School of Physical Sciences
Physics and Astronomy Department
Brookhaven National Laboratory
Department of Astronomy and Theoretical Physics
Institut für Kernphysik and Helmholtz Institute Mainz
Universität Würzburg
European XFEL GmbH
Dipartimento di Scienze Fisiche
Faculty of Physics
Scuola Superiore Meridionale e INFN
Institut am Fachbereich Informatik und Mathematik
Department of Industrial Engineering
Department of Electronic Engineering
Università degli Studi del Piemonte Orientale
Universidad de Guanajuato
L.N. Gumilyov Eurasian National University
Institute of Nuclear Research and Nuclear Energy of Bulgarian Academy of Science (INRNE-BAS)
National Research Nuclear University (MEPhI)
DESY
Weizmann Institute
Aix Marseille University
Department of Physics
Center for theoretical neuroscience
Dipartimento di Fisica dell’Università e INFN
Laboratoire Leprince Ringuet
SLAC National Accelerator Laboratory
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