CERN Accelerating science

002792406 001__ 2792406
002792406 005__ 20230810123354.0
002792406 0248_ $$aoai:cds.cern.ch:2792406$$pcerncds:FULLTEXT$$pcerncds:CERN:FULLTEXT$$pcerncds:CERN
002792406 0247_ $$2DOI$$9arXiv$$a10.1016/j.physletb.2022.137172$$qpublication
002792406 0247_ $$2DOI$$9Elsevier B.V.$$a10.1016/j.physletb.2022.137172$$qpublication
002792406 037__ $$9arXiv$$aarXiv:2202.00331$$chep-ex
002792406 037__ $$9arXiv:reportnumber$$aCERN-EP-2022-018
002792406 035__ $$9arXiv$$aoai:arXiv.org:2202.00331
002792406 035__ $$9Inspire$$a2026034
002792406 041__ $$aeng
002792406 088__ $$9CERN-EP-DRAFT-NA62-2021-002
002792406 100__ $$aCortina Gil, Eduardo$$iINSPIRE-00074616$$jORCID:0000-0001-9627-699X$$uLouvain U., CP3
002792406 110__ $$aThe NA62 collaboration
002792406 245__ $$9Elsevier B.V.$$aSearches for lepton number violating $K^+\to\pi^-(\pi^0)e^+e^+$ decays
002792406 246__ $$9Elsevier B.V.$$aSearches for lepton number violating K+ → π−(π0)e+e+ decays
002792406 260__ $$c2022-07-10
002792406 269__ $$c2022-02-01
002792406 300__ $$a16 p
002792406 506__ [email protected]
002792406 506__ $$mcds-readers-na62 [CERN]
002792406 506__ $$mcds-ph-ep-publications-referee-non-lhc [CERN]
002792406 500__ $$9arXiv$$aUpdated version (8 May 2022) accepted for publication in Physics
 Letters B
002792406 520__ $$aSearches 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.
002792406 520__ $$9Elsevier B.V.$$aSearches 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.
002792406 520__ $$9arXiv$$aSearches 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.
002792406 540__ $$3preprint$$aCC-BY-4.0$$uhttp://creativecommons.org/licenses/by/4.0/
002792406 540__ $$3publication$$aCC-BY-4.0$$fSCOAP3$$uhttp://creativecommons.org/licenses/by/4.0/
002792406 542__ $$3publication$$3publication$$dThe Authors$$g2022
002792406 562__ $$cComments submitted after 15-05-2022 22:27
002792406 595__ $$aCERN EDS
002792406 595_D $$aG$$d2022-02-16$$sfullabs
002792406 595_D $$aG$$d2022-02-20$$sprinted
002792406 65017 $$2SzGeCERN$$aParticle Physics - Experiment
002792406 65017 $$2arXiv$$ahep-ex
002792406 6531_ $$9CERN$$aflavor physics
002792406 6531_ $$9CERN$$abranching fraction
002792406 6531_ $$9CERN$$arare decay
002792406 6531_ $$9CERN$$aconservation law tests
002792406 6531_ $$9CERN$$aexperimental results
002792406 6531_ $$9CERN$$aKaon decays
002792406 6531_ $$9CERN$$aLepton number conservation
002792406 693__ $$aCERN SPS$$eNA62
002792406 690C_ $$aCERN
002792406 690C_ $$aARTICLE
002792406 700__ $$aMinucci, Elisa$$iINSPIRE-00645520$$jORCID:0000-0002-3972-6824$$uLouvain U., CP3$$uCERN$$uFrascati
002792406 700__ $$aPadolski, Sergey$$iINSPIRE-00645541$$jORCID:0000-0002-6795-7670$$uLouvain U., CP3
002792406 700__ $$aPetrov, Plamen$$iINSPIRE-00244162$$uLouvain U., CP3
002792406 700__ $$aVelghe, Bob$$iINSPIRE-00534512$$jORCID:0000-0002-0797-8381$$uTRIUMF
002792406 700__ $$aBryman, Douglas$$iINSPIRE-00069746$$jORCID:0000-0002-9691-0775$$uBritish Columbia U.$$uTRIUMF
002792406 700__ $$aFu, Ji$$iINSPIRE-00658074$$uBritish Columbia U.
002792406 700__ $$aNumao, Toshio$$iINSPIRE-00112127$$jORCID:0000-0001-5232-6190$$uTRIUMF
002792406 700__ $$aPetrov, Yevgeniy$$iINSPIRE-00152795$$jORCID:0000-0003-2643-8740$$uTRIUMF
002792406 700__ $$aWong, Vincent Wai Sum$$jORCID:0000-0001-5975-8164$$uTRIUMF
002792406 700__ $$aHusek, Tomas$$iINSPIRE-00415522$$jORCID:0000-0002-7208-9150$$uCharles U.
002792406 700__ $$aKampf, Karol$$iINSPIRE-00267210$$jORCID:0000-0003-1096-667X$$uCharles U.
002792406 700__ $$aZamkovsky, Michal$$iINSPIRE-00645551$$jORCID:0000-0002-5067-4789$$uCharles U.$$uLouvain U., CP3
002792406 700__ $$aJerhot, Jan$$iINSPIRE-00677772$$jORCID:0000-0002-3236-1471$$uCharles U.$$uLouvain U., CP3
002792406 700__ $$aAliberti, Riccardo$$iINSPIRE-00645569$$jORCID:0000-0003-3500-4012$$uMainz U., Inst. Phys.
002792406 700__ $$aKhoriauli, Gia$$iINSPIRE-00029896$$jORCID:0000-0002-6353-8452$$uMainz U., Inst. Phys.
002792406 700__ $$aKunze, Jonas$$iINSPIRE-00645582$$uMainz U., Inst. Phys.
002792406 700__ $$aLomidze, David$$iINSPIRE-00313725$$jORCID:0000-0003-3936-6942$$uMainz U., Inst. Phys.
002792406 700__ $$aMarchevski, Radoslav$$iINSPIRE-00645597$$jORCID:0000-0003-3410-0918$$uCERN$$uFlorence U.
002792406 700__ $$aPeruzzo, Letizia$$iINSPIRE-00645605$$jORCID:0000-0002-4752-6160$$uMainz U., Inst. Phys.
002792406 700__ $$aVormstein, Mario$$iINSPIRE-00645616$$uMainz U., Inst. Phys.
002792406 700__ $$aWanke, Rainer$$iINSPIRE-00134925$$jORCID:0000-0002-3636-360X$$uMainz U., Inst. Phys.
002792406 700__ $$aCotta Ramusino, Angelo$$iINSPIRE-00293524$$jORCID:0000-0003-1727-2478$$uINFN, Ferrara
002792406 700__ $$aDalpiaz, Pietro$$iINSPIRE-00276309$$uFerrara U.
002792406 700__ $$aFiorini, Massimiliano$$iINSPIRE-00017773$$jORCID:0000-0001-6559-2084$$uFerrara U.
002792406 700__ $$aGamberini, Enrico$$iINSPIRE-00645651$$jORCID:0000-0002-6040-4985$$uCERN
002792406 700__ $$aGianoli, Alberto$$iINSPIRE-00084674$$jORCID:0000-0002-2456-8667$$uINFN, Ferrara
002792406 700__ $$aNeri, Ilaria$$iINSPIRE-00645673$$jORCID:0000-0002-9047-9822$$uFerrara U.
002792406 700__ $$aNorton, Alan$$iINSPIRE-00293532$$jORCID:0000-0001-5959-5879$$uFerrara U.$$uGlasgow U.
002792406 700__ $$aPetrucci, Ferruccio$$iINSPIRE-00293540$$jORCID:0000-0002-7220-6919$$uFerrara U.
002792406 700__ $$aWahl, Heinrich$$iINSPIRE-00288993$$jORCID:0000-0003-0354-2465$$uFerrara U.$$uMainz U., Inst. Phys.
002792406 700__ $$aBizzeti, Andrea$$iINSPIRE-00258210$$jORCID:0000-0001-5729-5530$$uINFN, Florence
002792406 700__ $$aBucci, Francesca$$iINSPIRE-00042001$$jORCID:0000-0003-1726-3838$$uINFN, Florence
002792406 700__ $$aIacopini, Enrico$$iINSPIRE-00198335$$jORCID:0000-0002-5605-2497$$uFlorence U.
002792406 700__ $$aLatino, Giuseppe$$iINSPIRE-00100151$$jORCID:0000-0002-4098-3502$$uFlorence U.
002792406 700__ $$aLenti, Massimo$$iINSPIRE-00293559$$jORCID:0000-0002-2765-3955$$uFlorence U.
002792406 700__ $$aParenti, Andrea$$iINSPIRE-00678100$$jORCID:0000-0002-6132-5680$$uFlorence U.
002792406 700__ $$aVolpe, Roberta$$iINSPIRE-00312874$$jORCID:0000-0003-1782-2978$$uLouvain U., CP3$$uComenius U.
002792406 700__ $$aAntonelli, Antonella$$iINSPIRE-00293563$$jORCID:0000-0001-7671-7890$$uFrascati
002792406 700__ $$aGonnella, Francesco$$iINSPIRE-00571490$$jORCID:0000-0003-0885-1654$$uBirmingham U.
002792406 700__ $$aLamanna, Gianluca$$iINSPIRE-00184369$$jORCID:0000-0001-7452-8498$$uPisa U.
002792406 700__ $$aLanfranchi, Gaia$$iINSPIRE-00258442$$jORCID:0000-0002-9467-8001$$uFrascati
002792406 700__ $$aTinti, Gemma$$jORCID:0000-0003-1364-844X$$uFrascati
002792406 700__ $$aMartellotti, Silvia$$iINSPIRE-00266867$$jORCID:0000-0002-4363-7816$$uFrascati
002792406 700__ $$aMoulson, Matthew$$iINSPIRE-00109278$$jORCID:0000-0002-3951-4389$$uFrascati
002792406 700__ $$aKozhuharov, Venelin$$iINSPIRE-00169974$$jORCID:0000-0002-0669-7799$$uFrascati
002792406 700__ $$aLitov, Leandar$$iINSPIRE-00102196$$jORCID:0000-0002-8511-6883$$uDubna, JINR
002792406 700__ $$aGeorgiev, Georgi$$iINSPIRE-00643546$$jORCID:0000-0001-6884-3942$$uFrascati
002792406 700__ $$aRaggi, Mauro$$iINSPIRE-00293577$$jORCID:0000-0002-7448-9481$$uRome U.
002792406 700__ $$aSpadaro, Tommaso$$iINSPIRE-00038229$$jORCID:0000-0002-7101-2389$$uFrascati
002792406 700__ $$aAmbrosino, Fabio$$iINSPIRE-00293636$$jORCID:0000-0001-5577-1820$$uNaples U.
002792406 700__ $$aFiorenza, Renato$$jORCID:0000-0003-4965-7073$$uNaples U.
002792406 700__ $$aCapussela, Tiziana$$iINSPIRE-00646669$$uNaples U.
002792406 700__ $$aCorvino, Michele$$iINSPIRE-00658086$$jORCID:0000-0002-2401-412X$$uNaples U.$$uCERN
002792406 700__ $$aDi Filippo, Domenico$$iINSPIRE-00293644$$jORCID:0000-0003-1567-6786$$uNaples U.
002792406 700__ $$aMassarotti, Paolo$$iINSPIRE-00293652$$jORCID:0000-0002-9335-9690$$uNaples U.
002792406 700__ $$aMirra, Marco$$iINSPIRE-00646677$$jORCID:0000-0002-1190-2961$$uNaples U.
002792406 700__ $$aNapolitano, Marco$$iINSPIRE-00293660$$jORCID:0000-0003-1074-9552$$uNaples U.
002792406 700__ $$aSaracino, Giulio$$iINSPIRE-00293674$$jORCID:0000-0002-0714-5777$$uNaples U.
002792406 700__ $$aAnzivino, Giuseppina$$iINSPIRE-00062488$$jORCID:0000-0002-5967-0952$$uPerugia U.
002792406 700__ $$aImbergamo, Ermanno$$iINSPIRE-00293680$$uPerugia U.
002792406 700__ $$aLollini, Riccardo$$iINSPIRE-00658095$$jORCID:0000-0003-3898-7464$$uPerugia U.
002792406 700__ $$aSantoni, Cristiano$$iINSPIRE-00646701$$jORCID:0000-0001-7023-7116$$uPerugia U.
002792406 700__ $$aBrizioli, Francesco$$iINSPIRE-00658106$$jORCID:0000-0002-2047-441X$$uPerugia U.
002792406 700__ $$aBarbanera, Mattia$$iINSPIRE-00646714$$jORCID:0000-0002-3616-3341$$uINFN, Perugia
002792406 700__ $$aCenci, Patrizia$$iINSPIRE-00071861$$jORCID:0000-0001-6149-2676$$uINFN, Perugia
002792406 700__ $$aCheccucci, Bruno$$iINSPIRE-00313891$$jORCID:0000-0002-6464-1099$$uINFN, Perugia
002792406 700__ $$aDuk, Viacheslav$$iINSPIRE-00200319$$jORCID:0000-0001-6440-0087$$uBirmingham U.$$uINFN, Perugia
002792406 700__ $$aLupi, Matteo$$iINSPIRE-00564238$$jORCID:0000-0001-9770-6197$$uINFN, Perugia
002792406 700__ $$aPepe, Monica$$iINSPIRE-00115528$$jORCID:0000-0001-5624-4010$$uINFN, Perugia
002792406 700__ $$aPiccini, Mauro$$iINSPIRE-00293478$$jORCID:0000-0001-8659-4409$$uINFN, Perugia
002792406 700__ $$aLubrano, Pasquale$$iINSPIRE-00239607$$jORCID:0000-0003-0221-4806$$uINFN, Perugia
002792406 700__ $$aCostantini, Flavio$$iINSPIRE-00074663$$jORCID:0000-0002-2974-0067$$uPisa U.
002792406 700__ $$aDoble, Niels$$iINSPIRE-00293707$$jORCID:0000-0002-0174-5608$$uPisa U.$$uMainz U., Inst. Phys.
002792406 700__ $$aGiorgi, Marcello$$iINSPIRE-00084959$$jORCID:0000-0001-9571-6260$$uPisa U.
002792406 700__ $$aGiudici, Sergio$$iINSPIRE-00293715$$jORCID:0000-0003-3423-7981$$uPisa U.
002792406 700__ $$aLari, Enrico$$iINSPIRE-00677789$$jORCID:0000-0003-3303-0524$$uPisa U.
002792406 700__ $$aPinzino, Jacopo$$iINSPIRE-00646735$$jORCID:0000-0002-7418-0636$$uCERN$$uINFN, Pisa
002792406 700__ $$aPontisso, Luca$$iINSPIRE-00646743$$jORCID:0000-0001-7137-5254$$uINFN, Pisa$$uINFN, Rome
002792406 700__ $$aSozzi, Marco$$iINSPIRE-00127990$$jORCID:0000-0002-2923-1465$$uPisa U.
002792406 700__ $$aDi Lella, Luigi$$iINSPIRE-00293731$$jORCID:0000-0003-3697-1098$$uPisa U.$$uMainz U., Inst. Phys.
002792406 700__ $$aMannelli, Italo$$iINSPIRE-00104405$$jORCID:0000-0003-0445-7422$$uPisa, Scuola Normale Superiore
002792406 700__ $$aCerri, Claudio$$iINSPIRE-00203097$$uINFN, Pisa
002792406 700__ $$aFantechi, Riccardo$$iINSPIRE-00293770$$jORCID:0000-0002-6243-5726$$uINFN, Pisa
002792406 700__ $$aPedreschi, Elena$$iINSPIRE-00271374$$jORCID:0000-0001-7631-3933$$uPisa U.
002792406 700__ $$aPiandani, Roberto$$iINSPIRE-00293699$$jORCID:0000-0003-2226-8924$$uPerugia U.
002792406 700__ $$aSpinella, Franco$$iINSPIRE-00040755$$jORCID:0000-0002-9607-7920$$uINFN, Pisa
002792406 700__ $$aBiagioni, Andrea$$iINSPIRE-00658116$$jORCID:0000-0001-5820-1209$$uINFN, Rome
002792406 700__ $$aD'Agostini, Giulio$$iINSPIRE-00075401$$jORCID:0000-0002-6245-875X$$uRome U.
002792406 700__ $$aLeonardi, Emanuele$$iINSPIRE-00191014$$jORCID:0000-0001-8728-7582$$uINFN, Rome
002792406 700__ $$aLonardo, Alessandro$$iINSPIRE-00646819$$jORCID:0000-0002-5909-6508$$uINFN, Rome
002792406 700__ $$aValente, Paolo$$iINSPIRE-00224909$$jORCID:0000-0002-5413-0068$$uINFN, Rome
002792406 700__ $$aVicini, Piero$$iINSPIRE-00646829$$jORCID:0000-0002-4379-4563$$uINFN, Rome
002792406 700__ $$aCretaro, Paolo$$jORCID:0000-0002-2229-149X$$uINFN, Rome
002792406 700__ $$aTurisini, Matteo$$jORCID:0000-0002-5422-1891$$uINFN, Rome
002792406 700__ $$aFrezza, Ottorino$$jORCID:0000-0001-8277-1877$$uINFN, Rome
002792406 700__ $$aAmmendola, Roberto$$iINSPIRE-00646837$$jORCID:0000-0003-4501-3289$$uRome U., Tor Vergata
002792406 700__ $$aBonaiuto, Vincenzo$$iINSPIRE-00646848$$jORCID:0000-0002-2328-4793$$uRome U., Tor Vergata
002792406 700__ $$aDe Simone, Nicola$$iINSPIRE-00257027$$uCERN
002792406 700__ $$aFederici, Luca$$iINSPIRE-00646854$$jORCID:0000-0002-3401-9522$$uCERN
002792406 700__ $$aFucci, Adolfo$$iINSPIRE-00293812$$uRome U., Tor Vergata
002792406 700__ $$aSalamon, Andrea$$iINSPIRE-00226887$$jORCID:0000-0002-8438-8983$$uRome U., Tor Vergata
002792406 700__ $$aSargeni, Fausto$$iINSPIRE-00646877$$jORCID:0000-0002-0131-236X$$uRome U., Tor Vergata
002792406 700__ $$aArcidiacono, Roberta$$iINSPIRE-00062695$$jORCID:0000-0001-5904-142X$$uTurin U.
002792406 700__ $$aBiino, Cristina$$iINSPIRE-00316972$$jORCID:0000-0002-1397-7246$$uINFN, Turin
002792406 700__ $$aBloch-Devaux, Brigitte$$iINSPIRE-00067470$$jORCID:0000-0002-2463-1232$$uTurin U.
002792406 700__ $$aBoretto, Marco$$iINSPIRE-00646899$$jORCID:0000-0001-5012-4480$$uTurin U.$$uCERN
002792406 700__ $$aFilippi, Alessandra$$iINSPIRE-00194204$$jORCID:0000-0003-4715-8748$$uINFN, Turin
002792406 700__ $$aIacobuzio, Lorenza$$iINSPIRE-00646900$$uBirmingham U.
002792406 700__ $$aMarchetto, Flavio$$iINSPIRE-00104618$$jORCID:0000-0002-5623-8494$$uINFN, Turin
002792406 700__ $$aMenichetti, Ezio$$iINSPIRE-00106902$$jORCID:0000-0001-7143-8200$$uTurin U.
002792406 700__ $$aMigliore, Ernesto$$iINSPIRE-00107463$$jORCID:0000-0002-2271-5192$$uTurin U.
002792406 700__ $$aSoldi, Dario$$iINSPIRE-00584493$$jORCID:0000-0001-9059-4831$$uTurin U.
002792406 700__ $$aEngelfried, Jürgen$$iINSPIRE-00079560$$jORCID:0000-0001-5478-0602$$uSan Luis Potosi U.
002792406 700__ $$aEstrada-Tristan, Nora$$iINSPIRE-00560520$$jORCID:0000-0003-2977-9380$$uSan Luis Potosi U.
002792406 700__ $$aBragadireanu, Alexandru Mario$$iINSPIRE-00646917$$uBucharest, IFIN-HH
002792406 700__ $$aGhinescu, Stefan Alexandru$$iINSPIRE-00658121$$jORCID:0000-0003-3716-9857$$uBucharest, IFIN-HH
002792406 700__ $$aHutanu, Ovidiu Emanuel$$iINSPIRE-00646926$$uBucharest, IFIN-HH
002792406 700__ $$aEnik, Temur$$iINSPIRE-00646947$$jORCID:0000-0002-2761-9730$$uDubna, JINR
002792406 700__ $$aFalaleev, Valeri$$iINSPIRE-00293443$$jORCID:0000-0003-3150-2196$$uDubna, JINR$$uMoscow, INR
002792406 700__ $$aKekelidze, Vladimir$$iINSPIRE-00187700$$jORCID:0000-0001-8122-5065$$uDubna, JINR
002792406 700__ $$aKorotkova, Anna$$iINSPIRE-00658139$$uDubna, JINR
002792406 700__ $$aMadigozhin, Dmitry$$iINSPIRE-00293490$$jORCID:0000-0001-8524-3455$$uDubna, JINR
002792406 700__ $$aMisheva, Milena$$iINSPIRE-00308698$$uDubna, JINR
002792406 700__ $$aMolokanova, Natalia$$iINSPIRE-00293508$$uDubna, JINR
002792406 700__ $$aMovchan, Sergei$$iINSPIRE-00109340$$uDubna, JINR
002792406 700__ $$aPolenkevich, Irina$$iINSPIRE-00387429$$uDubna, JINR
002792406 700__ $$aPotrebenikov, Yuri$$iINSPIRE-00117443$$uDubna, JINR
002792406 700__ $$aShkarovskiy, Sergey$$iINSPIRE-00293516$$uDubna, JINR
002792406 700__ $$aZinchenko, Andrey$$uDubna, JINR
002792406 700__ $$aBaeva, Aigul$$iINSPIRE-00699635$$uDubna, JINR
002792406 700__ $$aBaigarashev, Dosbol$$iINSPIRE-00699652$$jORCID:0000-0001-6101-317X$$uDubna, JINR
002792406 700__ $$aEmelyanov, Dmitry$$iINSPIRE-00699669$$uDubna, JINR
002792406 700__ $$aFedotov, Sergei$$iINSPIRE-00725225$$uMoscow, INR
002792406 700__ $$aKhotyantsev, Alexey$$iINSPIRE-00645369$$uMoscow, INR
002792406 700__ $$aGushchin, Evgeny$$iINSPIRE-00259385$$jORCID:0000-0001-8857-1665$$uMoscow, INR
002792406 700__ $$aKleimenova, Alina$$iINSPIRE-00725214$$jORCID:0000-0002-9129-4985$$uLouvain U., CP3
002792406 700__ $$aKudenko, Yury$$iINSPIRE-00424961$$jORCID:0000-0003-3204-9426$$uMoscow, INR
002792406 700__ $$aKurochka, Viktoriia$$iINSPIRE-00658148$$uMoscow, INR
002792406 700__ $$aMedvedeva, Mariia$$iINSPIRE-00489319$$uMoscow, INR
002792406 700__ $$aMefodev, Aleksandr$$iINSPIRE-00725195$$uMoscow, INR
002792406 700__ $$aShaikhiev, Artur$$iINSPIRE-00584893$$jORCID:0000-0003-2921-8743$$uLouvain U., CP3
002792406 700__ $$aKholodenko, Sergey$$iINSPIRE-00577742$$jORCID:0000-0002-0260-6570$$uSerpukhov, IHEP
002792406 700__ $$aKurshetsov, Viktor$$iINSPIRE-00021963$$jORCID:0000-0003-0174-7336$$uSerpukhov, IHEP
002792406 700__ $$aObraztsov, Vladimir$$iINSPIRE-00191751$$jORCID:0000-0002-0994-3641$$uSerpukhov, IHEP
002792406 700__ $$aOstankov, Aleksandr$$iINSPIRE-00259452$$uSerpukhov, IHEP
002792406 700__ $$aSemenov, Vitali$$iINSPIRE-00029220$$uSerpukhov, IHEP
002792406 700__ $$aSugonyaev, Valentin$$iINSPIRE-00647723$$jORCID:0000-0003-4449-9993$$uSerpukhov, IHEP
002792406 700__ $$aYushchenko, Oleg$$iINSPIRE-00200283$$jORCID:0000-0003-4236-5115$$uSerpukhov, IHEP
002792406 700__ $$aBician, Lubos$$iINSPIRE-00647147$$jORCID:0000-0001-9318-0116$$uComenius U.$$uCERN
002792406 700__ $$aBlazek, Tomas$$iINSPIRE-00235878$$jORCID:0000-0002-2645-0283$$uComenius U.
002792406 700__ $$aCerny, Vladimir$$iINSPIRE-00157843$$jORCID:0000-0003-1998-3441$$uComenius U.
002792406 700__ $$aKoval, Michal$$iINSPIRE-00647155$$jORCID:0000-0002-6027-317X$$uCERN$$uCharles U.
002792406 700__ $$aKucerova, Zuzana$$iINSPIRE-00658154$$jORCID:0000-0001-8906-3902$$uComenius U.
002792406 700__ $$aCeccucci, Augusto$$iINSPIRE-00293435$$jORCID:0000-0002-9506-866X$$uCERN
002792406 700__ $$aBernhard, Johannes$$iINSPIRE-00390204$$jORCID:0000-0001-9256-971X$$uCERN
002792406 700__ $$aDanielsson, Hans$$iINSPIRE-00305727$$jORCID:0000-0002-1016-5576$$uCERN
002792406 700__ $$aDöbrich, Babette$$iINSPIRE-00367918$$jORCID:0000-0002-6008-8601$$uCERN
002792406 700__ $$aDuval, Francois$$iINSPIRE-00658164$$uCERN
002792406 700__ $$aGatignon, Lau$$iINSPIRE-00293451$$jORCID:0000-0001-6439-2945$$uCERN$$uLancaster U.
002792406 700__ $$aGuida, Roberto$$iINSPIRE-00320474$$uCERN
002792406 700__ $$aHahn, Ferdinand$$iINSPIRE-00204546$$uCERN
002792406 700__ $$aHolzer, Eva Barbara$$iINSPIRE-00090837$$jORCID:0000-0003-2622-6844$$uCERN
002792406 700__ $$aJenninger, Berthold$$iINSPIRE-00647275$$uCERN
002792406 700__ $$aLaycock, Paul$$iINSPIRE-00037318$$jORCID:0000-0002-8572-5339$$uCERN
002792406 700__ $$aLehmann Miotto, Giovanna$$iINSPIRE-00100928$$jORCID:0000-0001-9045-7853$$uCERN
002792406 700__ $$aLichard, Peter$$iINSPIRE-00101689$$jORCID:0000-0003-2223-9373$$uCERN
002792406 700__ $$aMapelli, Alessandro$$iINSPIRE-00219876$$jORCID:0000-0002-4128-1019$$uCERN
002792406 700__ $$aNoy, Matthew$$iINSPIRE-00318070$$uCERN
002792406 700__ $$aPalladino, Vito$$iINSPIRE-00474581$$jORCID:0000-0002-9786-9620$$uCERN
002792406 700__ $$aPerrin-Terrin, Mathieu$$iINSPIRE-00341683$$jORCID:0000-0002-3568-1956$$uCERN$$uLouvain U., CP3
002792406 700__ $$aRuggiero, Giuseppe$$iINSPIRE-00293761$$jORCID:0000-0001-6605-4739$$uLancaster U.$$uFlorence U.
002792406 700__ $$aRyjov, Vladimir$$iINSPIRE-00318161$$uCERN
002792406 700__ $$aSchuchmann, Simone$$iINSPIRE-00290837$$jORCID:0000-0002-8088-4226$$uCERN$$uMainz U., Inst. Phys.
002792406 700__ $$aVenditti, Stefano$$iINSPIRE-00293723$$uCERN
002792406 700__ $$aBrunetti, Maria Brigida$$iINSPIRE-00647436$$jORCID:0000-0003-1639-3577$$uBirmingham U.
002792406 700__ $$aBache, Thomas$$iINSPIRE-00677756$$jORCID:0000-0003-4520-830X$$uBirmingham U.
002792406 700__ $$aGoudzovski, Evgueni$$iINSPIRE-00293758$$jORCID:0000-0001-9398-4237$$uBirmingham U.
002792406 700__ $$aHenshaw, Jack$$iINSPIRE-00699679$$jORCID:0000-0001-7059-421X$$uBirmingham U.
002792406 700__ $$aTomczak, Adam$$jORCID:0000-0001-5635-3567$$uBirmingham U.
002792406 700__ $$aLazzeroni, Cristina$$iINSPIRE-00100355$$jORCID:0000-0003-4074-4787$$uBirmingham U.
002792406 700__ $$aFascianelli, Valeria$$iINSPIRE-00646590$$uBirmingham U.
002792406 700__ $$aLurkin, Nicolas$$iINSPIRE-00714031$$jORCID:0000-0002-9440-5927$$uBirmingham U.$$uLouvain U., CP3
002792406 700__ $$aNewson, Francis$$iINSPIRE-00645498$$uBirmingham U.
002792406 700__ $$aParkinson, Christopher$$iINSPIRE-00261996$$jORCID:0000-0003-0344-7361$$uBirmingham U.
002792406 700__ $$aRomano, Angela$$iINSPIRE-00293427$$jORCID:0000-0003-1779-9122$$uBirmingham U.
002792406 700__ $$aSergi, Antonino$$iINSPIRE-00184370$$jORCID:0000-0001-9495-6115$$uBirmingham U.
002792406 700__ $$aSturgess, Andrew$$iINSPIRE-00647470$$jORCID:0000-0002-8104-5571$$uBirmingham U.
002792406 700__ $$aSwallow, Joel$$iINSPIRE-00658173$$jORCID:0000-0002-1521-0911$$uBirmingham U.$$uCERN
002792406 700__ $$aHeath, Helen$$iINSPIRE-00089330$$jORCID:0000-0001-6576-9740$$uBristol U.
002792406 700__ $$aPage, Ryan$$iINSPIRE-00647489$$uBristol U.
002792406 700__ $$aTrilov, Stoyan$$iINSPIRE-00658186$$jORCID:0000-0003-0267-6402$$uBristol U.
002792406 700__ $$aAngelucci, Bruno$$iINSPIRE-00647495$$uGlasgow U.
002792406 700__ $$aBritton, David$$iINSPIRE-00069310$$jORCID:0000-0001-9998-4342$$uGlasgow U.
002792406 700__ $$aProtopopescu, Dan$$iINSPIRE-00059970$$jORCID:0000-0002-3964-3930$$uGlasgow U.
002792406 700__ $$aGraham, Connor$$iINSPIRE-00658195$$jORCID:0000-0001-9121-460X$$uGlasgow U.
002792406 700__ $$aJones, Roger William Lewis$$iINSPIRE-00216280$$jORCID:0000-0002-6427-3513$$uLancaster U.
002792406 700__ $$aDainton, John Bourke$$iINSPIRE-00075560$$uLancaster U.
002792406 700__ $$aFry, John Richard$$iINSPIRE-00082747$$jORCID:0000-0002-3680-361X$$uBirmingham U.
002792406 700__ $$aFulton, Liam$$iINSPIRE-00647505$$uLiverpool U.
002792406 700__ $$aHutchcroft, David$$iINSPIRE-00091737$$jORCID:0000-0002-4174-6509$$uLiverpool U.
002792406 700__ $$aCarmignani, Joseph$$iINSPIRE-00677766$$jORCID:0000-0002-1705-1061$$uLancaster U.
002792406 700__ $$aMassri, Karim$$iINSPIRE-00560127$$jORCID:0000-0001-7533-6295$$uCERN
002792406 700__ $$aMaurice, Emilie$$iINSPIRE-00257487$$jORCID:0000-0002-7366-4364$$uLiverpool U.
002792406 700__ $$aWrona, Bozydar$$iINSPIRE-00225840$$jORCID:0000-0002-1555-0262$$uLiverpool U.
002792406 700__ $$aConovaloff, Adam$$iINSPIRE-00647539$$uGeorge Mason U.
002792406 700__ $$aCooper, Peter$$iINSPIRE-00074384$$uGeorge Mason U.
002792406 700__ $$aCoward, David$$iINSPIRE-00074815$$jORCID:0000-0001-7588-1779$$uGeorge Mason U.
002792406 700__ $$aRubin, Philip David$$iINSPIRE-00121620$$jORCID:0000-0001-6678-4985$$uGeorge Mason U.
002792406 710__ $$gNA62 Collaboration
002792406 773__ $$c137172$$mpublication$$pPhys. Lett. B$$v830$$y2022
002792406 859__ [email protected]
002792406 8564_ $$82349009$$s656009$$uhttp://cds.cern.ch/record/2792406/files/CERN-EP-2022-018.pdf
002792406 8564_ $$82340999$$s657509$$uhttp://cds.cern.ch/record/2792406/files/CERN-EP-DRAFT-NA62-2021-002 - draft.pdf$$yDraft (restricted)$$zStamped by WebSubmit: 01/02/2022
002792406 8564_ $$82349510$$s50898$$uhttp://cds.cern.ch/record/2792406/files/misid-e.png$$y00002 Left: $\pi^\pm$ misidentification probability $P_{\pi e}$ for the LKr-based and RICH-based identification conditions, applied separately and together, measured in momentum bins. Right: $e^+$ misidentification probability $P_{e\pi}$ for the LKr-based $\pi^+$ identification condition, and $e^+$ identification inefficiency $1-\varepsilon_e$ for the LKr-based and RICH-based conditions, measured in momentum bins. Polynomial fits to the measured values used for the positron identification model are shown.
002792406 8564_ $$82349511$$s72753$$uhttp://cds.cern.ch/record/2792406/files/na62-sketch.png$$y00000 Schematic side view of the NA62 beamline and detector.
002792406 8564_ $$82349512$$s33074$$uhttp://cds.cern.ch/record/2792406/files/mpiee-lnv.png$$y00005 Left: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-e^+e^+$ selection. The shaded vertical band indicates the $m_{\pi ee}$ region masked during the analysis, including the signal region bounded by dashed lines. Right: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the control $K^+\to\pi^-e^+e^+$ selection with a missing momentum requirement. Inset: ratio of the data and simulated spectra, and a fit to the ratio with a linear function.
002792406 8564_ $$82349513$$s532864$$uhttp://cds.cern.ch/record/2792406/files/2202.00331.pdf$$yFulltext
002792406 8564_ $$82349514$$s46143$$uhttp://cds.cern.ch/record/2792406/files/mpiee-rich.png$$y00004 Reconstructed $m_{\pi ee}$ spectra of the data, simulated signal and backgrounds obtained using the standard $K^+\to\pi^+e^+e^-$ selection (left) and the control $K^+\to\pi^+e^+e^-$ selection involving RICH-based $e^+$ identification (right). The signal $m_{\pi ee}$ region is indicated with arrows.
002792406 8564_ $$82349515$$s36529$$uhttp://cds.cern.ch/record/2792406/files/misid-pi.png$$y00001 Left: $\pi^\pm$ misidentification probability $P_{\pi e}$ for the LKr-based and RICH-based identification conditions, applied separately and together, measured in momentum bins. Right: $e^+$ misidentification probability $P_{e\pi}$ for the LKr-based $\pi^+$ identification condition, and $e^+$ identification inefficiency $1-\varepsilon_e$ for the LKr-based and RICH-based conditions, measured in momentum bins. Polynomial fits to the measured values used for the positron identification model are shown.
002792406 8564_ $$82349516$$s42162$$uhttp://cds.cern.ch/record/2792406/files/mpiee.png$$y00003 Reconstructed $m_{\pi ee}$ spectra of the data, simulated signal and backgrounds obtained using the standard $K^+\to\pi^+e^+e^-$ selection (left) and the control $K^+\to\pi^+e^+e^-$ selection involving RICH-based $e^+$ identification (right). The signal $m_{\pi ee}$ region is indicated with arrows.
002792406 8564_ $$82349517$$s51224$$uhttp://cds.cern.ch/record/2792406/files/mpiee-lnv-inverted.png$$y00006 Left: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-e^+e^+$ selection. The shaded vertical band indicates the $m_{\pi ee}$ region masked during the analysis, including the signal region bounded by dashed lines. Right: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the control $K^+\to\pi^-e^+e^+$ selection with a missing momentum requirement. Inset: ratio of the data and simulated spectra, and a fit to the ratio with a linear function.
002792406 8564_ $$82349518$$s32022$$uhttp://cds.cern.ch/record/2792406/files/mpipiee-lnv.png$$y00007 Reconstructed $m_{\pi\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-\pi^0e^+e^+$ selection. The $K^+\to\pi^+\pi^0 e^+e^-$ contribution is the smallest, and is not shown. The shaded vertical band indicates the signal $m_{\pi\pi ee}$ region masked during the analysis.
002792406 8564_ $$82352128$$s72753$$uhttp://cds.cern.ch/record/2792406/files/w0_na62-sketch.png$$y00000 Schematic side view of the NA62 beamline and detector.
002792406 8564_ $$82352129$$s33074$$uhttp://cds.cern.ch/record/2792406/files/w5_mpiee-lnv.png$$y00005 Left: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-e^+e^+$ selection. The shaded vertical band indicates the $m_{\pi ee}$ region masked during the analysis, including the signal region bounded by dashed lines. Right: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the control $K^+\to\pi^-e^+e^+$ selection with a missing momentum requirement.
002792406 8564_ $$82352130$$s36529$$uhttp://cds.cern.ch/record/2792406/files/w1_misid-pi.png$$y00001 Left: $\pi^\pm$ misidentification probability $P_{\pi e}$ for the LKr-based and RICH-based identification conditions, applied separately and together, measured in momentum bins. Right: $e^+$ misidentification probability $P_{e\pi}$ for the LKr-based $\pi^+$ identification condition, and $e^+$ identification inefficiency $1-\varepsilon_e$ for the LKr-based and RICH-based conditions, measured in momentum bins. Polynomial fits to the measured values used for the positron identification model are shown.
002792406 8564_ $$82352131$$s46143$$uhttp://cds.cern.ch/record/2792406/files/w4_mpiee-rich.png$$y00004 Reconstructed $m_{\pi ee}$ spectra of the data, simulated signal and backgrounds obtained using the standard $K^+\to\pi^+e^+e^-$ selection (left) and the control $K^+\to\pi^+e^+e^-$ selection involving RICH-based $e^+$ identification (right). The signal $m_{\pi ee}$ region is indicated with arrows.
002792406 8564_ $$82352132$$s37044$$uhttp://cds.cern.ch/record/2792406/files/w6_mpiee-lnv-inverted.png$$y00006 Left: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-e^+e^+$ selection. The shaded vertical band indicates the $m_{\pi ee}$ region masked during the analysis, including the signal region bounded by dashed lines. Right: reconstructed $m_{\pi ee}$ spectra of the data and simulated backgrounds obtained using the control $K^+\to\pi^-e^+e^+$ selection with a missing momentum requirement.
002792406 8564_ $$82352133$$s42162$$uhttp://cds.cern.ch/record/2792406/files/w3_mpiee.png$$y00003 Reconstructed $m_{\pi ee}$ spectra of the data, simulated signal and backgrounds obtained using the standard $K^+\to\pi^+e^+e^-$ selection (left) and the control $K^+\to\pi^+e^+e^-$ selection involving RICH-based $e^+$ identification (right). The signal $m_{\pi ee}$ region is indicated with arrows.
002792406 8564_ $$82352134$$s50898$$uhttp://cds.cern.ch/record/2792406/files/w2_misid-e.png$$y00002 Left: $\pi^\pm$ misidentification probability $P_{\pi e}$ for the LKr-based and RICH-based identification conditions, applied separately and together, measured in momentum bins. Right: $e^+$ misidentification probability $P_{e\pi}$ for the LKr-based $\pi^+$ identification condition, and $e^+$ identification inefficiency $1-\varepsilon_e$ for the LKr-based and RICH-based conditions, measured in momentum bins. Polynomial fits to the measured values used for the positron identification model are shown.
002792406 8564_ $$82352135$$s32022$$uhttp://cds.cern.ch/record/2792406/files/w7_mpipiee-lnv.png$$y00007 Reconstructed $m_{\pi\pi ee}$ spectra of the data and simulated backgrounds obtained using the $K^+\to\pi^-\pi^0e^+e^+$ selection. The $K^+\to\pi^+\pi^0 e^+e^-$ contribution is the smallest, and is not shown. The shaded vertical band indicates the signal $m_{\pi\pi ee}$ region masked during the analysis.
002792406 9031_ $$aApproval requested for number CERN-EP-2022-018$$bCERN-EP-2022-018$$cEPPHAPP$$d2022-01-31 14:37:25$$e2022-02-07 14:37:[email protected]$$swaiting
002792406 9031_ $$aDocument approved$$bCERN-EP-2022-018$$cEPPHAPP$$d2022-02-01 09:25:[email protected]$$sapproved
002792406 916__ $$sn$$w202205
002792406 980__ $$aNA62_Papers
002792406 980__ $$aARTICLE