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. 2008 Jan 18;100(2):021801.
doi: 10.1103/PhysRevLett.100.021801. Epub 2008 Jan 15.

Observation of the semileptonic decays B-->D*tau-nutau and evidence for B-->Dtau-nutau

B Aubert  1 M BonaD BoutignyY KaryotakisJ P LeesV PoireauX PrudentV TisserandA ZghicheJ Garra TicoE GraugesL LopezA PalanoM PappagalloG EigenB StuguL SunG S AbramsM BattagliaD N BrownJ Button-ShaferR N CahnY GroysmanR G JacobsenJ A KadykL T KerthYu G KolomenskyG KukartsevD Lopes PegnaG LynchL M MirT J OrimotoI L OsipenkovM T RonanK TackmannT TanabeW A WenzelP Del Amo SanchezC M HawkesA T WatsonH KochT SchroederD WalkerD J AsgeirssonT Cuhadar-DonszelmannB G FulsomC HeartyT S MattisonJ A McKennaM BarrettA KhanM SaleemL TeodorescuV E BlinovA D BukinV P DruzhininV B GolubevA P OnuchinS I SerednyakovYu I SkovpenE P SolodovK Yu TodyshevM BondioliS CurryI EschrichD KirkbyA J LankfordP LundM MandelkernE C MartinD P StokerS AbachiC BuchananJ W GaryF LiuO LongB C ShenG M VitugL ZhangH P PaarS RahatlouV SharmaJ W BerryhillC CampagnariA CunhaB DahmesT M HongD KovalskyiJ D RichmanT W BeckA M EisnerC J FlaccoC A HeuschJ KrosebergW S LockmanT SchalkB A SchummA SeidenM G WilsonL O WinstromE ChenC H ChengF FangD G HitlinI NarskyT PiatenkoF C PorterR AndreassenG MancinelliB T MeadowsK MishraM D SokoloffF BlancP C BloomS ChenW T FordJ F HirschauerA KreiselM NagelU NauenbergA OlivasJ G SmithK A UlmerS R WagnerJ ZhangA M GabareenA SofferW H TokiR J WilsonF WinklmeierD D AltenburgE FeltresiA HaukeH JasperJ MerkelA PetzoldB SpaanK WackerV KloseM J KobelH M LackerW F MaderR NogowskiJ SchubertK R SchubertR SchwierzJ E SundermannA VolkD BernardG R BonneaudE LatourV LombardoCh ThiebauxM VerderiP J ClarkW GradlF MuheimS PlayferA I RobertsonJ E WatsonY XieM AndreottiD BettoniC BozziR CalabreseA CecchiG CibinettoP FranchiniE LuppiM NegriniA PetrellaL PiemonteseE PrencipeV SantoroF AnulliR Baldini-FerroliA CalcaterraR de SangroG FinocchiaroS PacettiP PatteriI M PeruzziM PiccoloM RamaA ZalloA BuzzoR ContriM Lo VetereM M MacriM R MongeS PassaggioC PatrignaniE RobuttiA SantroniS TosiK S ChaisanguanthumM MoriiJ WuR S DubitzkyJ MarksS SchenkU UwerD J BardP D DaunceyR L FlackJ A NashW Panduro 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BosisioC CartaroF CossuttiG Della RiccaL LanceriL VitaleV AzzoliniN Lopez-MarchF Martinez-VidalD A MilanesA OyangurenJ AlbertSw BanerjeeB BhuyanK HamanoR KowalewskiI M NugentJ M RoneyR J SobieP F HarrisonJ IlicT E LathamG B MohantyH R BandX ChenS DasuK T FloodJ J HollarP E KutterY PanM PieriniR PrepostS L WuH NealBABAR Collaboration
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Free article

Observation of the semileptonic decays B-->D*tau-nutau and evidence for B-->Dtau-nutau

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

Abstract

We present measurements of the semileptonic decays B--->D0tau-nutau, B--->D*0tau-nutau, B0-->D+tau-nutau, and B0-->D*+tau-nutau, which are potentially sensitive to non-standard model amplitudes. The data sample comprises 232x10(6) Upsilon(4S)-->BB decays collected with the BABAR detector. From a combined fit to B- and B0 channels, we obtain the branching fractions B(B-->Dtau-nutau)=(0.86+/-0.24+/-0.11+/-0.06)% and B(B-->D*tau-nutau)=(1.62+/-0.31+/-0.10+/-0.05)% (normalized for the B0), where the uncertainties are statistical, systematic, and normalization-mode-related.

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