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. 2004 Jul 23;93(4):041801.
doi: 10.1103/PhysRevLett.93.041801. Epub 2004 Jul 21.

Observation of the decay B-->J/psietaK and search for X(3872)-->J/psieta

B Aubert  1 R BarateD BoutignyF CoudercJ M GaillardA HicheurY KaryotakisJ P LeesV TisserandA ZghicheA PalanoA PompiliJ C ChenN D QiG RongP WangY S ZhuG EigenI OfteB StuguG S AbramsA W BorglandA B BreonD N BrownJ Button-ShaferR N CahnE CharlesC T DayM S GillA V GritsanY GroysmanR G JacobsenR W KadelJ KadykL T KerthYu G KolomenskyG KukartsevC LeClercM E LeviG LynchL M MirP J OddoneT J OrimotoM PripsteinN A RoeM T RonanV G ShelkovA V TelnovW A WenzelK FordT J HarrisonC M HawkesS E MorganA T WatsonN K WatsonM FritschK GoetzenT HeldH KochB LewandowskiM PelizaeusM SteinkeJ T BoydN ChevalierW N CottinghamM P KellyT E LathamF F WilsonK AbeT Cuhadar-DonszelmannC HeartyT S MattisonJ A McKennaD ThiessenP KyberdL TeodorescuV E BlinovA D BukinV P DruzhininV B GolubevV N IvanchenkoE A KravchenkoA P OnuchinS I SerednyakovYu I SkovpenE P SolodovA N YushkovD BestM BruinsmaM ChaoI EschrichD KirkbyA J LankfordM MandelkernR K MommsenW RoethelD P StokerC BuchananB L HartfielJ W GaryB C ShenK WangD del ReH K HadavandE J HillD B MacFarlaneH P PaarSh RahatlouV SharmaJ W BerryhillC CampagnariB DahmesS L LevyO LongA LuM A MazurJ D RichmanW VerkerkeT W BeckA M EisnerC A HeuschW S LockmanT SchalkR E SchmitzB A SchummA SeidenP SpradlinD C WilliamsM G WilsonJ AlbertE ChenG P Dubois-FelsmannA DvoretskiiD G HitlinI NarskyT PiatenkoF C PorterA RydA SamuelS YangS JayatillekeG MancinelliB T MeadowsM D SokoloffT AbeF BlancP BloomS ChenP J ClarkW T FordU NauenbergA OlivasP RankinJ G SmithW C van HoekL ZhangJ L HartonT HuA SofferW H TokiR J WilsonQ ZengD AltenburgT BrandtJ BroseT ColbergM DickoppE FeltresiA HaukeH M LackerE MalyR Müller-PfefferkornR NogowskiS OttoJ SchubertK R SchubertR SchwierzB SpaanD BernardG R BonneaudF BrochardP GrenierCh ThiebauxG VasileiadisM VerderiD J BardA KhanD LavinF MuheimS PlayferM AndreottiV AzzoliniD BettoniC BozziR CalabreseG CibinettoE LuppiM NegriniA SartiE TreadwellR Baldini-FerroliA CalcaterraR de SangroG FinocchiaroP PatteriM PiccoloA ZalloA BuzzoR CapraR ContriG 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EdwardsT I MeyerB A PetersenC RoatS AhmedM S AlamJ A ErnstM A SaeedM SaleemF R WapplerW BuggM KrishnamurthyS M SpanierR EckmannH KimJ L RitchieA SatpathyR F SchwittersJ M IzenI KitayamaX C LouS YeF BianchiM BonaF GalloD GambaC BoreanL BosisioF CossuttiG Della RiccaS DittongoS GrancagnoloL LanceriP PoropatL VitaleG VuagninR S PanviniSw BanerjeeC M BrownD FortinP D JacksonR KowalewskiJ M RoneyH R BandS DasuM DattaA M EichenbaumJ J HollarJ R JohnsonP E KutterH LiR LiuF Di LodovicoA MihalyiA K MohapatraY PanR PrepostS J SekulaP TanJ H von Wimmersperg-ToellerJ WuS L WuZ YuH Neal
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Free article

Observation of the decay B-->J/psietaK and search for X(3872)-->J/psieta

B Aubert et al. Phys Rev Lett. .
Free article

Abstract

We report the observation of the B meson decay B+/- -->J/psietaK+/- and evidence for the decay B0-->J/psietaK0S, using 90 x 10(6) BB; events collected at the Upsilon(4S) resonance with the BABAR detector at the SLAC PEP-II e+e- asymmetric-energy storage ring. We obtain branching fractions of B(B+/- -->J/psietaK+/-) = [10.8 +/- 2.3(stat) +/- 2.4(syst)] x 10(-5) and B(B0-->J/psietaK0S) = [8.4 +/- 2.6(stat) +/- 2.7(syst)] x 10(-5). We search for the new narrow mass state, the X(3872), recently reported by the Belle Collaboration, in the decay B+/- -->X(3872)K+/-,X(3872)-->J/psieta and determine an upper limit of B[B +/- -->X(3872)K+/- -->J/psietaK+/-] < 7.7 x 10(-6) at 90% confidence level.

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