6533b7defe1ef96bd1275ad2
RESEARCH PRODUCT
Evidence ofB+→τ+νdecays with hadronicBtags
J. P. LeesV. PoireauV. TisserandJ. Garra TicoE. GraugesA. PalanoG. EigenB. StuguD. N. BrownL. T. KerthYu. G. KolomenskyG. LynchH. KochT. SchroederD. J. AsgeirssonC. HeartyT. S. MattisonJ. A. MckennaR. Y. SoA. KhanV. E. BlinovA. R. BuzykaevV. P. DruzhininV. B. GolubevE. A. KravchenkoA. P. OnuchinS. I. SerednyakovYu. I. SkovpenE. P. SolodovK. Yu. TodyshevA. N. YushkovM. BondioliD. KirkbyA. J. LankfordM. MandelkernH. AtmacanJ. W. GaryF. LiuO. LongG. M. VitugC. CampagnariT. M. HongD. KovalskyiJ. D. RichmanC. A. WestA. M. EisnerJ. KrosebergW. S. LockmanA. J. MartinezB. A. SchummA. SeidenD. S. ChaoC. H. ChengB. EchenardK. T. FloodD. G. HitlinP. OngmongkolkulF. C. PorterA. Y. RakitinR. AndreassenZ. HuardB. T. MeadowsM. D. SokoloffL. SunP. C. BloomW. T. FordA. GazU. NauenbergJ. G. SmithS. R. WagnerR. AyadW. H. TokiB. SpaanK. R. SchubertR. SchwierzD. BernardM. VerderiP. J. ClarkS. PlayferD. BettoniC. BozziR. CalabreseG. CibinettoE. FioravantiI. GarziaE. LuppiM. MuneratoL. PiemonteseV. SantoroR. Baldini-ferroliA. CalcaterraR. De SangroG. FinocchiaroP. PatteriI. M. PeruzziM. PiccoloM. RamaA. ZalloR. ContriE. GuidoM. Lo VetereM. R. MongeS. PassaggioC. PatrignaniE. RobuttiB. BhuyanV. PrasadC. L. LeeM. MoriiA. J. EdwardsA. AdametzU. UwerH. M. LackerT. LueckP. D. DaunceyU. MallikC. ChenJ. CochranW. T. MeyerS. PrellA. E. RubinA. V. GritsanZ. J. GuoN. ArnaudM. DavierD. DerkachG. GrosdidierF. Le DiberderA. M. LutzB. MalaescuP. RoudeauM. H. SchuneA. StocchiG. WormserD. J. LangeD. M. WrightC. A. ChavezJ. P. ColemanJ. R. FryE. GabathulerD. E. HutchcroftD. J. PayneC. TouramanisA. J. BevanF. Di LodovicoR. SaccoM. SigamaniG. CowanD. N. BrownC. L. DavisA. G. DenigM. FritschW. GradlK. GriessingerA. HafnerE. PrencipeR. J. BarlowG. JacksonG. D. LaffertyE. BehnR. CenciB. HamiltonA. JawaheryD. A. RobertsC. DallapiccolaR. CowanD. DujmicG. SciollaR. CheaibD. LindemannP. M. PatelS. H. RobertsonP. BiassoniN. NeriF. PalomboS. StrackaL. CremaldiR. GodangR. KroegerP. SonnekD. J. SummersX. NguyenM. SimardP. TarasG. De NardoD. MonorchioG. OnoratoC. SciaccaM. MartinelliG. RavenC. P. JessopJ. M. LoseccoW. F. WangK. HonscheidR. KassJ. BrauR. FreyN. B. SinevD. StromE. TorrenceE. FeltresiN. GagliardiM. MargoniM. MorandinM. PosoccoM. RotondoG. SimiF. SimonettoR. StroiliS. AkarE. Ben-haimM. BombenG. R. BonneaudH. BriandG. CalderiniJ. ChauveauO. HamonPh. LerusteG. MarchioriJ. OcarizS. SittM. BiasiniE. ManoniS. PacettiA. RossiC. AngeliniG. BatignaniS. BettariniM. CarpinelliG. CasarosaA. CervelliF. FortiM. A. GiorgiA. LusianiB. OberhofE. PaoloniA. PerezG. RizzoJ. J. WalshD. Lopes PegnaJ. OlsenA. J. S. SmithA. V. TelnovF. AnulliR. FacciniF. FerrarottoF. FerroniM. GasperoL. Li GioiM. A. MazzoniG. PireddaC. BüngerO. GrünbergT. HartmannT. LeddigH. SchröderC. VossR. WaldiT. AdyeE. O. OlaiyaF. F. WilsonS. EmeryG. Hamel De MonchenaultG. VasseurCh. YècheD. AstonD. J. BardR. BartoldusJ. F. BenitezC. CartaroM. R. ConveryJ. DorfanG. P. Dubois-felsmannW. DunwoodieM. EbertR. C. FieldM. Franco SevillaB. G. FulsomA. M. GabareenM. T. GrahamP. GrenierC. HastW. R. InnesM. H. KelseyP. KimM. L. KocianD. W. G. S. LeithP. LewisB. LindquistS. LuitzV. LuthH. L. LynchD. B. MacfarlaneD. R. MullerH. NealS. NelsonM. PerlT. PulliamB. N. RatcliffA. RoodmanA. A. SalnikovR. H. SchindlerA. SnyderD. SuM. K. SullivanJ. Va’vraA. P. WagnerW. J. WisniewskiM. WittgenD. H. WrightH. W. WulsinC. C. YoungV. ZieglerW. ParkM. V. PurohitR. M. WhiteJ. R. WilsonA. Randle-condeS. J. SekulaM. BellisP. R. BurchatT. S. MiyashitaM. S. AlamJ. A. ErnstR. GorodeiskyN. GuttmanD. R. PeimerA. SofferP. LundS. M. SpanierJ. L. RitchieA. M. RulandR. F. SchwittersB. C. WrayJ. M. IzenX. C. LouF. BianchiD. GambaS. ZambitoL. LanceriL. VitaleF. Martinez-vidalA. OyangurenH. AhmedJ. AlbertSw. BanerjeeF. U. BernlochnerH. H. F. ChoiG. J. KingR. KowalewskiM. J. LewczukI. M. NugentJ. M. RoneyR. J. SobieN. TasneemT. J. GershonP. F. HarrisonT. E. LathamE. M. T. PuccioH. R. BandS. DasuY. PanR. PrepostS. L. Wusubject
PhysicsHadronic decayNuclear and High Energy PhysicsParticle physics010308 nuclear & particles physicsCabibbo–Kobayashi–Maskawa matrixBranching fractionElectron–positron annihilationHadronResonanceValue (computer science)01 natural sciencesNuclear physics0103 physical sciences010306 general physicsLeptondescription
We present a search for the decay B+→τ+ν using 467.8×10^6 BB pairs collected at the Υ(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. We select a sample of events with one completely reconstructed B- in the hadronic decay mode (B-→D(*)0X- and B-→J/ψX-). We examine the rest of the event to search for a B+→τ+ν decay. We identify the τ+ lepton in the following modes: τ+→e+νν , τ+→μ+νν , τ+→π+ν and τ+→ρ+ν . We find an excess of events with respect to the expected background, which excludes the null signal hypothesis at the level of 3.8σ (including systematic uncertainties) and corresponds to a branching fraction value of B(B+→τ+ν)=(1.83_(-0.49)^(+0.53)(stat)±0.24(syst))×10^(-4).
year | journal | country | edition | language |
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2013-08-08 | Physical Review D |