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. 2008 May 2;100(17):171802.
doi: 10.1103/PhysRevLett.100.171802. Epub 2008 Apr 29.

Measurements of partial branching fractions for B-->Xulnu and determination of |Vub|

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 BuchananS D FoulkesJ 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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GambaM PelliccioniM BombenL 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

Measurements of partial branching fractions for B-->Xulnu and determination of |Vub|

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

Abstract

We present partial branching fractions for inclusive charmless semileptonic B decays B[over ]-->X_{u}lnu[over ], and the determination of the Cabibbo-Kobayashi-Maskawa matrix element |V_{ub}|. The analysis is based on a sample of 383 x 10;{6} Upsilon(4S) decays into BB[over ] pairs collected with the BABAR detector at the SLAC PEP-II e;{+}e;{-} storage rings. We select events using the invariant mass M_{X} of the hadronic system, the invariant mass squared, q;{2}, of the lepton and neutrino pair, the kinematic variable P+, or one of their combinations. We then determine partial branching fractions in limited regions of phase space: DeltaB=(1.18+/-0.09_{stat}+/-0.07_{syst}+/-0.01_{theor})x10;{-3} (M_{X}<1.55 GeV/c;{2}), DeltaB=(0.95+/-0.10_{stat}+/-0.08_{syst}+/-0.01_{theor})x10;{-3} (P+<0.66 GeV/c), and DeltaB=(0.81+/-0.08_{stat}+/-0.07_{syst}+/-0.02_{theor})x10;{-3} (M_{X}<1.7 GeV/c;{2}, q;{2}>8 GeV;{2}/c;{4}). Corresponding values of |V_{ub}| are extracted using several theoretical calculations.

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