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Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays

Searches for lepton number violating $K^+\to\pi^-e^+e^+$ and $K^+\to\pi^-\pi^0e^+e^+$ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $5.3\times 10^{-11}$ and $8.5\times 10^{-10}$ are obtained on the decay branching fractio...

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Autores principales: Cortina Gil, Eduardo, Minucci, Elisa, Padolski, Sergey, Petrov, Plamen, Velghe, Bob, Bryman, Douglas, Fu, Ji, Numao, Toshio, Petrov, Yevgeniy, Wong, Vincent Wai Sum, Husek, Tomas, Kampf, Karol, Zamkovsky, Michal, Jerhot, Jan, Aliberti, Riccardo, Khoriauli, Gia, Kunze, Jonas, Lomidze, David, Marchevski, Radoslav, Peruzzo, Letizia, Vormstein, Mario, Wanke, Rainer, Cotta Ramusino, Angelo, Dalpiaz, Pietro, Fiorini, Massimiliano, Gamberini, Enrico, Gianoli, Alberto, Neri, Ilaria, Norton, Alan, Petrucci, Ferruccio, Wahl, Heinrich, Bizzeti, Andrea, Bucci, Francesca, Iacopini, Enrico, Latino, Giuseppe, Lenti, Massimo, Parenti, Andrea, Volpe, Roberta, Antonelli, Antonella, Gonnella, Francesco, Lamanna, Gianluca, Lanfranchi, Gaia, Tinti, Gemma, Martellotti, Silvia, Moulson, Matthew, Kozhuharov, Venelin, Litov, Leandar, Georgiev, Georgi, Raggi, Mauro, Spadaro, Tommaso, Ambrosino, Fabio, Fiorenza, Renato, Capussela, Tiziana, Corvino, Michele, Di Filippo, Domenico, Massarotti, Paolo, Mirra, Marco, Napolitano, Marco, Saracino, Giulio, Anzivino, Giuseppina, Imbergamo, Ermanno, Lollini, Riccardo, Santoni, Cristiano, Brizioli, Francesco, Barbanera, Mattia, Cenci, Patrizia, Checcucci, Bruno, Duk, Viacheslav, Lupi, Matteo, Pepe, Monica, Piccini, Mauro, Lubrano, Pasquale, Costantini, Flavio, Doble, Niels, Giorgi, Marcello, Giudici, Sergio, Lari, Enrico, Pinzino, Jacopo, Pontisso, Luca, Sozzi, Marco, Di Lella, Luigi, Mannelli, Italo, Cerri, Claudio, Fantechi, Riccardo, Pedreschi, Elena, Piandani, Roberto, Spinella, Franco, Biagioni, Andrea, D'Agostini, Giulio, Leonardi, Emanuele, Lonardo, Alessandro, Valente, Paolo, Vicini, Piero, Cretaro, Paolo, Turisini, Matteo, Frezza, Ottorino, Ammendola, Roberto, Bonaiuto, Vincenzo, De Simone, Nicola, Federici, Luca, Fucci, Adolfo, Salamon, Andrea, Sargeni, Fausto, Arcidiacono, Roberta, Biino, Cristina, Bloch-Devaux, Brigitte, Boretto, Marco, Filippi, Alessandra, Iacobuzio, Lorenza, Marchetto, Flavio, Menichetti, Ezio, Migliore, Ernesto, Soldi, Dario, Engelfried, Jürgen, Estrada-Tristan, Nora, Bragadireanu, Alexandru Mario, Ghinescu, Stefan Alexandru, Hutanu, Ovidiu Emanuel, Enik, Temur, Falaleev, Valeri, Kekelidze, Vladimir, Korotkova, Anna, Madigozhin, Dmitry, Misheva, Milena, Molokanova, Natalia, Movchan, Sergei, Polenkevich, Irina, Potrebenikov, Yuri, Shkarovskiy, Sergey, Zinchenko, Andrey, Baeva, Aigul, Baigarashev, Dosbol, Emelyanov, Dmitry, Fedotov, Sergei, Khotyantsev, Alexey, Gushchin, Evgeny, Kleimenova, Alina, Kudenko, Yury, Kurochka, Viktoriia, Medvedeva, Mariia, Mefodev, Aleksandr, Shaikhiev, Artur, Kholodenko, Sergey, Kurshetsov, Viktor, Obraztsov, Vladimir, Ostankov, Aleksandr, Semenov, Vitali, Sugonyaev, Valentin, Yushchenko, Oleg, Bician, Lubos, Blazek, Tomas, Cerny, Vladimir, Koval, Michal, Kucerova, Zuzana, Ceccucci, Augusto, Bernhard, Johannes, Danielsson, Hans, Döbrich, Babette, Duval, Francois, Gatignon, Lau, Guida, Roberto, Hahn, Ferdinand, Holzer, Eva Barbara, Jenninger, Berthold, Laycock, Paul, Lehmann Miotto, Giovanna, Lichard, Peter, Mapelli, Alessandro, Noy, Matthew, Palladino, Vito, Perrin-Terrin, Mathieu, Ruggiero, Giuseppe, Ryjov, Vladimir, Schuchmann, Simone, Venditti, Stefano, Brunetti, Maria Brigida, Bache, Thomas, Goudzovski, Evgueni, Henshaw, Jack, Tomczak, Adam, Lazzeroni, Cristina, Fascianelli, Valeria, Lurkin, Nicolas, Newson, Francis, Parkinson, Christopher, Romano, Angela, Sergi, Antonino, Sturgess, Andrew, Swallow, Joel, Heath, Helen, Page, Ryan, Trilov, Stoyan, Angelucci, Bruno, Britton, David, Protopopescu, Dan, Graham, Connor, Jones, Roger William Lewis, Dainton, John Bourke, Fry, John Richard, Fulton, Liam, Hutchcroft, David, Carmignani, Joseph, Massri, Karim, Maurice, Emilie, Wrona, Bozydar, Conovaloff, Adam, Cooper, Peter, Coward, David, Rubin, Philip David
Lenguaje:eng
Publicado: 2022
Materias:
Acceso en línea:https://dx.doi.org/10.1016/j.physletb.2022.137172
http://cds.cern.ch/record/2792406
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author Cortina Gil, Eduardo
Minucci, Elisa
Padolski, Sergey
Petrov, Plamen
Velghe, Bob
Bryman, Douglas
Fu, Ji
Numao, Toshio
Petrov, Yevgeniy
Wong, Vincent Wai Sum
Husek, Tomas
Kampf, Karol
Zamkovsky, Michal
Jerhot, Jan
Aliberti, Riccardo
Khoriauli, Gia
Kunze, Jonas
Lomidze, David
Marchevski, Radoslav
Peruzzo, Letizia
Vormstein, Mario
Wanke, Rainer
Cotta Ramusino, Angelo
Dalpiaz, Pietro
Fiorini, Massimiliano
Gamberini, Enrico
Gianoli, Alberto
Neri, Ilaria
Norton, Alan
Petrucci, Ferruccio
Wahl, Heinrich
Bizzeti, Andrea
Bucci, Francesca
Iacopini, Enrico
Latino, Giuseppe
Lenti, Massimo
Parenti, Andrea
Volpe, Roberta
Antonelli, Antonella
Gonnella, Francesco
Lamanna, Gianluca
Lanfranchi, Gaia
Tinti, Gemma
Martellotti, Silvia
Moulson, Matthew
Kozhuharov, Venelin
Litov, Leandar
Georgiev, Georgi
Raggi, Mauro
Spadaro, Tommaso
Ambrosino, Fabio
Fiorenza, Renato
Capussela, Tiziana
Corvino, Michele
Di Filippo, Domenico
Massarotti, Paolo
Mirra, Marco
Napolitano, Marco
Saracino, Giulio
Anzivino, Giuseppina
Imbergamo, Ermanno
Lollini, Riccardo
Santoni, Cristiano
Brizioli, Francesco
Barbanera, Mattia
Cenci, Patrizia
Checcucci, Bruno
Duk, Viacheslav
Lupi, Matteo
Pepe, Monica
Piccini, Mauro
Lubrano, Pasquale
Costantini, Flavio
Doble, Niels
Giorgi, Marcello
Giudici, Sergio
Lari, Enrico
Pinzino, Jacopo
Pontisso, Luca
Sozzi, Marco
Di Lella, Luigi
Mannelli, Italo
Cerri, Claudio
Fantechi, Riccardo
Pedreschi, Elena
Piandani, Roberto
Spinella, Franco
Biagioni, Andrea
D'Agostini, Giulio
Leonardi, Emanuele
Lonardo, Alessandro
Valente, Paolo
Vicini, Piero
Cretaro, Paolo
Turisini, Matteo
Frezza, Ottorino
Ammendola, Roberto
Bonaiuto, Vincenzo
De Simone, Nicola
Federici, Luca
Fucci, Adolfo
Salamon, Andrea
Sargeni, Fausto
Arcidiacono, Roberta
Biino, Cristina
Bloch-Devaux, Brigitte
Boretto, Marco
Filippi, Alessandra
Iacobuzio, Lorenza
Marchetto, Flavio
Menichetti, Ezio
Migliore, Ernesto
Soldi, Dario
Engelfried, Jürgen
Estrada-Tristan, Nora
Bragadireanu, Alexandru Mario
Ghinescu, Stefan Alexandru
Hutanu, Ovidiu Emanuel
Enik, Temur
Falaleev, Valeri
Kekelidze, Vladimir
Korotkova, Anna
Madigozhin, Dmitry
Misheva, Milena
Molokanova, Natalia
Movchan, Sergei
Polenkevich, Irina
Potrebenikov, Yuri
Shkarovskiy, Sergey
Zinchenko, Andrey
Baeva, Aigul
Baigarashev, Dosbol
Emelyanov, Dmitry
Fedotov, Sergei
Khotyantsev, Alexey
Gushchin, Evgeny
Kleimenova, Alina
Kudenko, Yury
Kurochka, Viktoriia
Medvedeva, Mariia
Mefodev, Aleksandr
Shaikhiev, Artur
Kholodenko, Sergey
Kurshetsov, Viktor
Obraztsov, Vladimir
Ostankov, Aleksandr
Semenov, Vitali
Sugonyaev, Valentin
Yushchenko, Oleg
Bician, Lubos
Blazek, Tomas
Cerny, Vladimir
Koval, Michal
Kucerova, Zuzana
Ceccucci, Augusto
Bernhard, Johannes
Danielsson, Hans
Döbrich, Babette
Duval, Francois
Gatignon, Lau
Guida, Roberto
Hahn, Ferdinand
Holzer, Eva Barbara
Jenninger, Berthold
Laycock, Paul
Lehmann Miotto, Giovanna
Lichard, Peter
Mapelli, Alessandro
Noy, Matthew
Palladino, Vito
Perrin-Terrin, Mathieu
Ruggiero, Giuseppe
Ryjov, Vladimir
Schuchmann, Simone
Venditti, Stefano
Brunetti, Maria Brigida
Bache, Thomas
Goudzovski, Evgueni
Henshaw, Jack
Tomczak, Adam
Lazzeroni, Cristina
Fascianelli, Valeria
Lurkin, Nicolas
Newson, Francis
Parkinson, Christopher
Romano, Angela
Sergi, Antonino
Sturgess, Andrew
Swallow, Joel
Heath, Helen
Page, Ryan
Trilov, Stoyan
Angelucci, Bruno
Britton, David
Protopopescu, Dan
Graham, Connor
Jones, Roger William Lewis
Dainton, John Bourke
Fry, John Richard
Fulton, Liam
Hutchcroft, David
Carmignani, Joseph
Massri, Karim
Maurice, Emilie
Wrona, Bozydar
Conovaloff, Adam
Cooper, Peter
Coward, David
Rubin, Philip David
author_facet Cortina Gil, Eduardo
Minucci, Elisa
Padolski, Sergey
Petrov, Plamen
Velghe, Bob
Bryman, Douglas
Fu, Ji
Numao, Toshio
Petrov, Yevgeniy
Wong, Vincent Wai Sum
Husek, Tomas
Kampf, Karol
Zamkovsky, Michal
Jerhot, Jan
Aliberti, Riccardo
Khoriauli, Gia
Kunze, Jonas
Lomidze, David
Marchevski, Radoslav
Peruzzo, Letizia
Vormstein, Mario
Wanke, Rainer
Cotta Ramusino, Angelo
Dalpiaz, Pietro
Fiorini, Massimiliano
Gamberini, Enrico
Gianoli, Alberto
Neri, Ilaria
Norton, Alan
Petrucci, Ferruccio
Wahl, Heinrich
Bizzeti, Andrea
Bucci, Francesca
Iacopini, Enrico
Latino, Giuseppe
Lenti, Massimo
Parenti, Andrea
Volpe, Roberta
Antonelli, Antonella
Gonnella, Francesco
Lamanna, Gianluca
Lanfranchi, Gaia
Tinti, Gemma
Martellotti, Silvia
Moulson, Matthew
Kozhuharov, Venelin
Litov, Leandar
Georgiev, Georgi
Raggi, Mauro
Spadaro, Tommaso
Ambrosino, Fabio
Fiorenza, Renato
Capussela, Tiziana
Corvino, Michele
Di Filippo, Domenico
Massarotti, Paolo
Mirra, Marco
Napolitano, Marco
Saracino, Giulio
Anzivino, Giuseppina
Imbergamo, Ermanno
Lollini, Riccardo
Santoni, Cristiano
Brizioli, Francesco
Barbanera, Mattia
Cenci, Patrizia
Checcucci, Bruno
Duk, Viacheslav
Lupi, Matteo
Pepe, Monica
Piccini, Mauro
Lubrano, Pasquale
Costantini, Flavio
Doble, Niels
Giorgi, Marcello
Giudici, Sergio
Lari, Enrico
Pinzino, Jacopo
Pontisso, Luca
Sozzi, Marco
Di Lella, Luigi
Mannelli, Italo
Cerri, Claudio
Fantechi, Riccardo
Pedreschi, Elena
Piandani, Roberto
Spinella, Franco
Biagioni, Andrea
D'Agostini, Giulio
Leonardi, Emanuele
Lonardo, Alessandro
Valente, Paolo
Vicini, Piero
Cretaro, Paolo
Turisini, Matteo
Frezza, Ottorino
Ammendola, Roberto
Bonaiuto, Vincenzo
De Simone, Nicola
Federici, Luca
Fucci, Adolfo
Salamon, Andrea
Sargeni, Fausto
Arcidiacono, Roberta
Biino, Cristina
Bloch-Devaux, Brigitte
Boretto, Marco
Filippi, Alessandra
Iacobuzio, Lorenza
Marchetto, Flavio
Menichetti, Ezio
Migliore, Ernesto
Soldi, Dario
Engelfried, Jürgen
Estrada-Tristan, Nora
Bragadireanu, Alexandru Mario
Ghinescu, Stefan Alexandru
Hutanu, Ovidiu Emanuel
Enik, Temur
Falaleev, Valeri
Kekelidze, Vladimir
Korotkova, Anna
Madigozhin, Dmitry
Misheva, Milena
Molokanova, Natalia
Movchan, Sergei
Polenkevich, Irina
Potrebenikov, Yuri
Shkarovskiy, Sergey
Zinchenko, Andrey
Baeva, Aigul
Baigarashev, Dosbol
Emelyanov, Dmitry
Fedotov, Sergei
Khotyantsev, Alexey
Gushchin, Evgeny
Kleimenova, Alina
Kudenko, Yury
Kurochka, Viktoriia
Medvedeva, Mariia
Mefodev, Aleksandr
Shaikhiev, Artur
Kholodenko, Sergey
Kurshetsov, Viktor
Obraztsov, Vladimir
Ostankov, Aleksandr
Semenov, Vitali
Sugonyaev, Valentin
Yushchenko, Oleg
Bician, Lubos
Blazek, Tomas
Cerny, Vladimir
Koval, Michal
Kucerova, Zuzana
Ceccucci, Augusto
Bernhard, Johannes
Danielsson, Hans
Döbrich, Babette
Duval, Francois
Gatignon, Lau
Guida, Roberto
Hahn, Ferdinand
Holzer, Eva Barbara
Jenninger, Berthold
Laycock, Paul
Lehmann Miotto, Giovanna
Lichard, Peter
Mapelli, Alessandro
Noy, Matthew
Palladino, Vito
Perrin-Terrin, Mathieu
Ruggiero, Giuseppe
Ryjov, Vladimir
Schuchmann, Simone
Venditti, Stefano
Brunetti, Maria Brigida
Bache, Thomas
Goudzovski, Evgueni
Henshaw, Jack
Tomczak, Adam
Lazzeroni, Cristina
Fascianelli, Valeria
Lurkin, Nicolas
Newson, Francis
Parkinson, Christopher
Romano, Angela
Sergi, Antonino
Sturgess, Andrew
Swallow, Joel
Heath, Helen
Page, Ryan
Trilov, Stoyan
Angelucci, Bruno
Britton, David
Protopopescu, Dan
Graham, Connor
Jones, Roger William Lewis
Dainton, John Bourke
Fry, John Richard
Fulton, Liam
Hutchcroft, David
Carmignani, Joseph
Massri, Karim
Maurice, Emilie
Wrona, Bozydar
Conovaloff, Adam
Cooper, Peter
Coward, David
Rubin, Philip David
author_sort Cortina Gil, Eduardo
collection CERN
description Searches for lepton number violating $K^+\to\pi^-e^+e^+$ and $K^+\to\pi^-\pi^0e^+e^+$ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $5.3\times 10^{-11}$ and $8.5\times 10^{-10}$ are obtained on the decay branching fractions at 90% confidence level. The former result improves the limit by a factor of four over the previous best limit, while the latter result represents the first limit on the $K^+\to\pi^-\pi^0e^+e^+$ decay rate.
id cern-2792406
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2022
record_format invenio
spelling cern-27924062023-08-10T10:33:54Zdoi:10.1016/j.physletb.2022.137172doi:10.1016/j.physletb.2022.137172http://cds.cern.ch/record/2792406engCortina Gil, EduardoMinucci, ElisaPadolski, SergeyPetrov, PlamenVelghe, BobBryman, DouglasFu, JiNumao, ToshioPetrov, YevgeniyWong, Vincent Wai SumHusek, TomasKampf, KarolZamkovsky, MichalJerhot, JanAliberti, RiccardoKhoriauli, GiaKunze, JonasLomidze, DavidMarchevski, RadoslavPeruzzo, LetiziaVormstein, MarioWanke, RainerCotta Ramusino, AngeloDalpiaz, PietroFiorini, MassimilianoGamberini, EnricoGianoli, AlbertoNeri, IlariaNorton, AlanPetrucci, FerruccioWahl, HeinrichBizzeti, AndreaBucci, FrancescaIacopini, EnricoLatino, GiuseppeLenti, MassimoParenti, AndreaVolpe, RobertaAntonelli, AntonellaGonnella, FrancescoLamanna, GianlucaLanfranchi, GaiaTinti, GemmaMartellotti, SilviaMoulson, MatthewKozhuharov, VenelinLitov, LeandarGeorgiev, GeorgiRaggi, MauroSpadaro, TommasoAmbrosino, FabioFiorenza, RenatoCapussela, TizianaCorvino, MicheleDi Filippo, DomenicoMassarotti, PaoloMirra, MarcoNapolitano, MarcoSaracino, GiulioAnzivino, GiuseppinaImbergamo, ErmannoLollini, RiccardoSantoni, CristianoBrizioli, FrancescoBarbanera, MattiaCenci, PatriziaCheccucci, BrunoDuk, ViacheslavLupi, MatteoPepe, MonicaPiccini, MauroLubrano, PasqualeCostantini, FlavioDoble, NielsGiorgi, MarcelloGiudici, SergioLari, EnricoPinzino, JacopoPontisso, LucaSozzi, MarcoDi Lella, LuigiMannelli, ItaloCerri, ClaudioFantechi, RiccardoPedreschi, ElenaPiandani, RobertoSpinella, FrancoBiagioni, AndreaD'Agostini, GiulioLeonardi, EmanueleLonardo, AlessandroValente, PaoloVicini, PieroCretaro, PaoloTurisini, MatteoFrezza, OttorinoAmmendola, RobertoBonaiuto, VincenzoDe Simone, NicolaFederici, LucaFucci, AdolfoSalamon, AndreaSargeni, FaustoArcidiacono, RobertaBiino, CristinaBloch-Devaux, BrigitteBoretto, MarcoFilippi, AlessandraIacobuzio, LorenzaMarchetto, FlavioMenichetti, EzioMigliore, ErnestoSoldi, DarioEngelfried, JürgenEstrada-Tristan, NoraBragadireanu, Alexandru MarioGhinescu, Stefan AlexandruHutanu, Ovidiu EmanuelEnik, TemurFalaleev, ValeriKekelidze, VladimirKorotkova, AnnaMadigozhin, DmitryMisheva, MilenaMolokanova, NataliaMovchan, SergeiPolenkevich, IrinaPotrebenikov, YuriShkarovskiy, SergeyZinchenko, AndreyBaeva, AigulBaigarashev, DosbolEmelyanov, DmitryFedotov, SergeiKhotyantsev, AlexeyGushchin, EvgenyKleimenova, AlinaKudenko, YuryKurochka, ViktoriiaMedvedeva, MariiaMefodev, AleksandrShaikhiev, ArturKholodenko, SergeyKurshetsov, ViktorObraztsov, VladimirOstankov, AleksandrSemenov, VitaliSugonyaev, ValentinYushchenko, OlegBician, LubosBlazek, TomasCerny, VladimirKoval, MichalKucerova, ZuzanaCeccucci, AugustoBernhard, JohannesDanielsson, HansDöbrich, BabetteDuval, FrancoisGatignon, LauGuida, RobertoHahn, FerdinandHolzer, Eva BarbaraJenninger, BertholdLaycock, PaulLehmann Miotto, GiovannaLichard, PeterMapelli, AlessandroNoy, MatthewPalladino, VitoPerrin-Terrin, MathieuRuggiero, GiuseppeRyjov, VladimirSchuchmann, SimoneVenditti, StefanoBrunetti, Maria BrigidaBache, ThomasGoudzovski, EvgueniHenshaw, JackTomczak, AdamLazzeroni, CristinaFascianelli, ValeriaLurkin, NicolasNewson, FrancisParkinson, ChristopherRomano, AngelaSergi, AntoninoSturgess, AndrewSwallow, JoelHeath, HelenPage, RyanTrilov, StoyanAngelucci, BrunoBritton, DavidProtopopescu, DanGraham, ConnorJones, Roger William LewisDainton, John BourkeFry, John RichardFulton, LiamHutchcroft, DavidCarmignani, JosephMassri, KarimMaurice, EmilieWrona, BozydarConovaloff, AdamCooper, PeterCoward, DavidRubin, Philip DavidSearches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decaysParticle Physics - Experimenthep-exSearches for lepton number violating $K^+\to\pi^-e^+e^+$ and $K^+\to\pi^-\pi^0e^+e^+$ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $5.3\times 10^{-11}$ and $8.5\times 10^{-10}$ are obtained on the decay branching fractions at 90% confidence level. The former result improves the limit by a factor of four over the previous best limit, while the latter result represents the first limit on the $K^+\to\pi^-\pi^0e^+e^+$ decay rate.Searches for lepton number violating <math altimg="si1.svg"><msup><mrow><mi>K</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup></math> and <math altimg="si2.svg"><msup><mrow><mi>K</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup></math> decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016–2018. Upper limits of <math altimg="si3.svg"><mn>5.3</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo><mn>11</mn></mrow></msup></math> and <math altimg="si4.svg"><mn>8.5</mn><mo>×</mo><msup><mrow><mn>10</mn></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo><mn>10</mn></mrow></msup></math> are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the <math altimg="si2.svg"><msup><mrow><mi>K</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><mo stretchy="false">→</mo><msup><mrow><mi>π</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">−</mo></mrow></msup><msup><mrow><mi>π</mi></mrow><mrow><mn>0</mn></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup><msup><mrow><mi>e</mi></mrow><mrow><mo linebreak="badbreak" linebreakstyle="after">+</mo></mrow></msup></math> decay rate.Searches for lepton number violating $K^+\to\pi^-e^+e^+$ and $K^+\to\pi^-\pi^0e^+e^+$ decays have been performed using the complete dataset collected by the NA62 experiment at CERN in 2016-2018. Upper limits of $5.3\times 10^{-11}$ and $8.5\times 10^{-10}$ are obtained on the decay branching fractions at 90% confidence level. The former result improves by a factor of four over the previous best limit, while the latter result represents the first limit on the $K^+\to\pi^-\pi^0e^+e^+$ decay rate.arXiv:2202.00331CERN-EP-2022-018oai:cds.cern.ch:27924062022-02-01
spellingShingle Particle Physics - Experiment
hep-ex
Cortina Gil, Eduardo
Minucci, Elisa
Padolski, Sergey
Petrov, Plamen
Velghe, Bob
Bryman, Douglas
Fu, Ji
Numao, Toshio
Petrov, Yevgeniy
Wong, Vincent Wai Sum
Husek, Tomas
Kampf, Karol
Zamkovsky, Michal
Jerhot, Jan
Aliberti, Riccardo
Khoriauli, Gia
Kunze, Jonas
Lomidze, David
Marchevski, Radoslav
Peruzzo, Letizia
Vormstein, Mario
Wanke, Rainer
Cotta Ramusino, Angelo
Dalpiaz, Pietro
Fiorini, Massimiliano
Gamberini, Enrico
Gianoli, Alberto
Neri, Ilaria
Norton, Alan
Petrucci, Ferruccio
Wahl, Heinrich
Bizzeti, Andrea
Bucci, Francesca
Iacopini, Enrico
Latino, Giuseppe
Lenti, Massimo
Parenti, Andrea
Volpe, Roberta
Antonelli, Antonella
Gonnella, Francesco
Lamanna, Gianluca
Lanfranchi, Gaia
Tinti, Gemma
Martellotti, Silvia
Moulson, Matthew
Kozhuharov, Venelin
Litov, Leandar
Georgiev, Georgi
Raggi, Mauro
Spadaro, Tommaso
Ambrosino, Fabio
Fiorenza, Renato
Capussela, Tiziana
Corvino, Michele
Di Filippo, Domenico
Massarotti, Paolo
Mirra, Marco
Napolitano, Marco
Saracino, Giulio
Anzivino, Giuseppina
Imbergamo, Ermanno
Lollini, Riccardo
Santoni, Cristiano
Brizioli, Francesco
Barbanera, Mattia
Cenci, Patrizia
Checcucci, Bruno
Duk, Viacheslav
Lupi, Matteo
Pepe, Monica
Piccini, Mauro
Lubrano, Pasquale
Costantini, Flavio
Doble, Niels
Giorgi, Marcello
Giudici, Sergio
Lari, Enrico
Pinzino, Jacopo
Pontisso, Luca
Sozzi, Marco
Di Lella, Luigi
Mannelli, Italo
Cerri, Claudio
Fantechi, Riccardo
Pedreschi, Elena
Piandani, Roberto
Spinella, Franco
Biagioni, Andrea
D'Agostini, Giulio
Leonardi, Emanuele
Lonardo, Alessandro
Valente, Paolo
Vicini, Piero
Cretaro, Paolo
Turisini, Matteo
Frezza, Ottorino
Ammendola, Roberto
Bonaiuto, Vincenzo
De Simone, Nicola
Federici, Luca
Fucci, Adolfo
Salamon, Andrea
Sargeni, Fausto
Arcidiacono, Roberta
Biino, Cristina
Bloch-Devaux, Brigitte
Boretto, Marco
Filippi, Alessandra
Iacobuzio, Lorenza
Marchetto, Flavio
Menichetti, Ezio
Migliore, Ernesto
Soldi, Dario
Engelfried, Jürgen
Estrada-Tristan, Nora
Bragadireanu, Alexandru Mario
Ghinescu, Stefan Alexandru
Hutanu, Ovidiu Emanuel
Enik, Temur
Falaleev, Valeri
Kekelidze, Vladimir
Korotkova, Anna
Madigozhin, Dmitry
Misheva, Milena
Molokanova, Natalia
Movchan, Sergei
Polenkevich, Irina
Potrebenikov, Yuri
Shkarovskiy, Sergey
Zinchenko, Andrey
Baeva, Aigul
Baigarashev, Dosbol
Emelyanov, Dmitry
Fedotov, Sergei
Khotyantsev, Alexey
Gushchin, Evgeny
Kleimenova, Alina
Kudenko, Yury
Kurochka, Viktoriia
Medvedeva, Mariia
Mefodev, Aleksandr
Shaikhiev, Artur
Kholodenko, Sergey
Kurshetsov, Viktor
Obraztsov, Vladimir
Ostankov, Aleksandr
Semenov, Vitali
Sugonyaev, Valentin
Yushchenko, Oleg
Bician, Lubos
Blazek, Tomas
Cerny, Vladimir
Koval, Michal
Kucerova, Zuzana
Ceccucci, Augusto
Bernhard, Johannes
Danielsson, Hans
Döbrich, Babette
Duval, Francois
Gatignon, Lau
Guida, Roberto
Hahn, Ferdinand
Holzer, Eva Barbara
Jenninger, Berthold
Laycock, Paul
Lehmann Miotto, Giovanna
Lichard, Peter
Mapelli, Alessandro
Noy, Matthew
Palladino, Vito
Perrin-Terrin, Mathieu
Ruggiero, Giuseppe
Ryjov, Vladimir
Schuchmann, Simone
Venditti, Stefano
Brunetti, Maria Brigida
Bache, Thomas
Goudzovski, Evgueni
Henshaw, Jack
Tomczak, Adam
Lazzeroni, Cristina
Fascianelli, Valeria
Lurkin, Nicolas
Newson, Francis
Parkinson, Christopher
Romano, Angela
Sergi, Antonino
Sturgess, Andrew
Swallow, Joel
Heath, Helen
Page, Ryan
Trilov, Stoyan
Angelucci, Bruno
Britton, David
Protopopescu, Dan
Graham, Connor
Jones, Roger William Lewis
Dainton, John Bourke
Fry, John Richard
Fulton, Liam
Hutchcroft, David
Carmignani, Joseph
Massri, Karim
Maurice, Emilie
Wrona, Bozydar
Conovaloff, Adam
Cooper, Peter
Coward, David
Rubin, Philip David
Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title_full Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title_fullStr Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title_full_unstemmed Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title_short Searches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
title_sort searches for lepton number violating $k^+\to\pi^-(\pi^0)e^+e^+$ decays
topic Particle Physics - Experiment
hep-ex
url https://dx.doi.org/10.1016/j.physletb.2022.137172
https://dx.doi.org/10.1016/j.physletb.2022.137172
http://cds.cern.ch/record/2792406
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