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RNikitin, NNikodem, TNomerotski, ANovoselov, AOblakowska-Mucha, AObraztsov, VOggero, SOgilvy, SOkhrimenko, OOldeman, ROrlandea, MGoicochea, JMOOwen, POyanguren, APal, BKPalano, APalutan, MPanman, JPapanestis, APappagallo, MParkes, CParkinson, CJPassaleva, GPatel, GDPatel, MPatrick, GNPatrignani, CPavel-Nicorescu, CAlvarez, APPearce, APellegrino, APenso, GAltarelli, MPPerazzini, STrigo, EPYzquierdo, APCPerret, PPerrin-Terrin, MPescatore, LPesen, EPessina, GPetridis, KPetrolini, APhan, AOlloqui, EPPietrzyk, BPilar, TPinci, DPlayfer, SCasasus, MPPolci, FPolok, GPoluektov, APolyakov, IPolycarpo, EPopov, APopov, DPopovici, BPotterat, CPowell, APrisciandaro, JPritchard, AProuve, CPugatch, VNavarro, APPunzi, GQian, WRachwal, BRademacker, JHRakotomiaramanana, BRangel, MSRaniuk, IRauschmayr, NRaven, GRedford, SReichert, SReid, MMdos Reis, ACRicciardi, SRichards, ARinnert, KMolina, VRRomero, DARRobbe, PRoberts, DARodrigues, ABRodrigues, EPerez, PRRoiser, SRomanovsky, VVidal, ARRouvinet, JRuf, TRuffini, FRuiz, HValls, PRSabatino, GSilva, JJSSagidova, NSail, PSaitta, BGuimaraes, VSSedes, BSSantacesaria, RRios, CSSantovetti, ESapunov, MSarti, ASatriano, CSatta, ASavrie, MSavrina, DSchiller, MSchindler, HSchlupp, MSchmelling, MSchmidt, BSchneider, OSchopper, ASchune, MHSchwemmer, RSciascia, BSciubba, ASeco, MSemennikov, ASenderowska, KSepp, ISerra, NSerrano, JSeyfert, PShapkin, MShapoval, IShcheglov, YShears, TShekhtman, LShevchenko, OShevchenko, VShires, ACoutinho, RSSirendi, MSkidmore, NSkwarnicki, TSmith, NASmith, ESmith, JSmith, MSokoloff, MDSoler, FJPSoomro, FSouza, DDe Paula, BSSpaan, BSparkes, ASpradlin, PStagni, FStahl, SSteinkamp, OStevenson, SStoica, SStone, SStoraci, BStraticiuc, MStraumann, USubbiah, VKSun, LSutcliffe, WSwientek, SSyropoulos, VSzczekowski, MSzczypka, PSzilard, DSzumlak, TT'Jampens, STeklishyn, MTeodorescu, ETeubert, FThomas, CThomas, Evan Tilburg, JTisserand, VTobin, MTolk, STonelli, DTopp-Joergensen, STorr, NTournefier, ETourneur, STran, MTTresch, MTsaregorodtsev, ATsopelas, PTuning, NGarcia, MUUkleja, AUstyuzhanin, AUwer, UVagnoni, VValenti, GVallier, AGomez, RVRegueiro, PVSierra, CVVecchi, SVelthuis, JJVeltri, MVeneziano, GVesterinen, MViaud, BVieira, DVilasis-Cardona, XVollhardt, AVolyanskyy, DVoong, DVorobyev, AVorobyev, VVoss, CVoss, HWaldi, RWallace, CWallace, RWandernoth, SWang, JWard, DRWatson, NKWebber, ADWebsdale, DWhitehead, MWicht, JWiechczynski, JWiedner, DWiggers, LWilkinson, GWilliams, MPWilliams, MWilson, FFWimberley, JWishahi, JWislicki, WWitek, MWormser, GWotton, SAWright, SWu, SWyllie, KXie, YXing, ZYang, ZYuan, XYushchenko, OZangoli, MZavertyaev, MZhang, FZhang, LZhang, WCZhang, YZhelezov, AZhokhov, AZhong, LZvyagin, A2024-07-182024-07-181029-8479http://akademikarsiv.cbu.edu.tr:4000/handle/123456789/11151The decay -> J/psi K (+) K (-) pi (+) is observed for the first time, using protonproton collisions collected with the LHCb detector corresponding to an integrated luminosity of 3 fb(-1). A signal yield of 78 +/- 14 decays is reported with a significance of 6.2 standard deviations. The ratio of the branching fraction of -> J/psi K (+) K (-) pi (+) decays to that of -> J/psi IEuro (+) decays is measured to be 0.53 +/- 0.10 +/- 0.05, where the first uncertainty is statistical and the second is systematic.EnglishB-CMESONTOOLArticle