6533b7dcfe1ef96bd1273241

RESEARCH PRODUCT

First measurement of the ratio of branching fractionsB(Λb0→Λc+μ−ν¯μ)/B(Λb0→Λc+π−)

Chris HaysM. GiuntaConor HendersonMarcelo VogelA. RahamanC. PlagerF. CanelliLuca ScodellaroK. L. ByrumJ. P. FernandezP. GirominiJ. NettStefano GiaguAnna ZanettiAlexei SafonovM. ShimojimaM. ShimojimaRodolfo CarosiJoe IncandelaRainer WallnyJacobo KonigsbergH. MiyakeStanislav TokárStanislav TokárAdrian BuzatuV. BoisvertF. HappacherU. K. YangU. K. YangT. WakisakaDario BiselloA. BhattiAnkita MehtaA. Barbaro-galtieriT. MakiF. GarbersonMauro Dell'orsoC. HaberJonas RademackerJonas RademackerR. L. WagnerY. KusakabeJ. D. LewisG. WilliamsDaniel WhitesonDaniel WhitesonB. Y. HanB. CasalK. GoulianosEmily NurseC. S. MoonAlberto AnnoviV. KhotilovichH. C. FangA. CanepaD. LucchesiBernd StelzerP. Movilla FernandezK. TollefsonS. NeubauerJ. P. ChouP. SquillaciotiKazuhiko HaraA. NaganoG. MancaY. SeiyaA. SedovP. Ttito-guzmánM. CordelliG. BusettoBrian L WinerJ. E. KimR. E. HughesT. RodriguezMariopaolo GiordaniPetar MaksimovicT. DaviesTetsuo ArisawaK. ChungElisabetta PianoriA. V. KotwalUlysses GrundlerP. De BarbaroJ. BeringerFranco BedeschiThorsten ChwalekR. G. WagnerThomas LecompteV. CavaliereN. MiladinovicD. TobackR. J. MillerS. BehariJ. BoudreauA. J. SlaughterD. AmideiJulien DoniniRobert M HarrisT. OkusawaL. Sexton-kennedyL. OakesJane NachtmanG. VelevN. Van RemortelN. Van RemortelT. KuhrGiovanni BellettiniG. CompostellaMaxim GoncharovM. FeindtTara ShearsS. H. ChangP. SchlabachM. A. SchmidtU. HusemannM. LindgrenJ. ProudfootV. A. GiakoumopoulouSandra LeoneJ. R. SmithA. PenzoW. JohnsonG. De LorenzoJ. HustonT. AkimotoC. S. HillC. S. HillIgnacio RedondoMichael SchmittY. D. OhN. KimuraM. JonesC. S. LinTomoko YoshidaKristian Allan HahnM. HartzS. M. WynneMichael L. NormanA. MukherjeeSally SeidelA. ScribanoS. TorreH. S. KimK. T. PittsLouis LyonsKoji NakamuraV. PapadimitriouM. IoriG. FlanaganM. RossiJ. PatrickJ. ConwayS. RichterMichal KrepsS. AmerioC. WolfeM. StanitzkiCorrinne MillsVirgil E BarnesM. RescignoG. GiurgiuS. CarrilloS. CarrilloA. MitraD. BeecherPeter WagnerSofia VallecorsaS. ZucchelliJ. LinacreS. W. LeeS. W. LeeR. E. BlairE. JamesF. RimondiS. De CeccoN. P. KulkarniS. H. KimP. TotaroMaxwell ChertokAndrew BeretvasW. K. SakumotoV. RamakrishnanAndrea BocciStephan LammelS. LamiL. CerritoL. CerritoM. M. DeninnoB. R. KoTommaso DorigoS. SomalwarDeepak KarG. ChlachidzeG. PiacentinoE. LeeE. LeeK. KondoSong-ming WangF. AzfarB. ParksJames RussKohei YoritaD. GlenzinskiA. GesslerP. F. DerwentV. RusuS. BuddP. DongJ. L. GimmellAlexander ParamonovGeorgios ChoudalakisP. H. BeaucheminJ. MorlokK. GenserM. LancasterPaul LujanM. MilnikM. P. SchmidtG. PaulettaC. DelucaAidan RobsonD. P. BenjaminB. WhitehouseViktor VeszpremiS. Y. JunY. TakeuchiD. ErredeFabrizio ScuriG. B. YuE. J. JeonRoman LysakRoman LysakA. SukhanovA. G. ClarkPetra MerkelM. E. MattsonR. VilarTh. MüllerR. Martínez-ballarínThomas PeifferS. Y. TsaiA. HockerK. MakhoulManfred PauliniManuela CampanelliJ. N. BellingerC. I. CiobanuB. ÁLvarez GonzálezC. Grosso-pilcherI. OksuzianO. PoukhovN. GoldschmidtPeter BusseyPeter BusseySi XieE. PueschelV. SorinK. SliwaI. YuB. BrauB. BrauS. KlimenkoG. CortianaC. P. MarinoY. KatoJ. YamaokaV. BartschJ. Guimaraes Da CostaS. CarronA. YagilElliot LipelesD. TonelliIgor VolobouevT. TomuraO. SaltóI. V. GorelovJ. ThomJ. ThomDuncan CarlsmithT. SpreitzerJ. PursleyFederico SforzaM. GoldL. SartoriD. HareM. WeinbergerA. J. MartinC. VellidisL. RistoriJ. StrologasKevin BurkettW. H. ChungN. PounderR. ForrestP. SinervoS. WilburA. GreseleJ. C. YunOliver Stelzer-chiltonYongsun KimY. C. ChenMark KruseAlison ListerM. A. HouldenPaul TiptonR. McnultyR. McnultyM. HareM. TecchioA. VarganovS. TkaczykDavid StuartY. C. YangE. VatagaS. CabreraS. CabreraP. MuratDean HidasJahred AdelmanL. NodulmanJ. WeineltI. SuslovP. CatastiniV. V. GlagolevC. BrombergA. DeisherMassimo CasarsaL. PondromE. WicklundL. SantiS. Pagan GrisoT. WrightS. GrinsteinA. BridgemanM. CampbellC. CalanchaI. LazzizzeraRobert SnihurH. W. KimGiorgio ChiarelliR. MumfordR. G. FeildJ. SpaldingF. PrakoshynJ. S. SuhJ. EfronS. H. ChuangS. HewamanageSinead FarringtonC. NeuP. RoyRobin ErbacherM. DattaJ. CuevasJ. CuevasB. T. HuffmanW-m. YaoA. AttalD. J. CoxA. PronkoG. P. YehY. S. ChungA. BodekW. C. WesterJoe KrollA. AnastassovG. BauerJ. O. NielsenM. J. MorelloR. CulbertsonO. NorniellaF. D. SniderT. VineB. JayatilakaL. ZanelloA. GolossanovN. RanjanAlessandro CerriL. LovasL. LovasJeannine Wagner-kuhrRoger MooreD. O. LitvintsevA. NapierJ. M. HeuserJ. GalyardtR. F. HarrL. BrigliadoriT. AaltonenJ. Y. HanM. J. KimA. MenzioneM. E. ConveryR. KephartE. PalenciaR. VidalJ. C. CullyA. AurisanoJ. SlaunwhiteAntonio BoveiaTeresa RodrigoS. WolbersX. ZhangT. A. SchwarzMonica D'onofrioN. GiokarisC. A. CoxN. MoggiT. J. PhillipsV. NeculaSam HarperA. HeijboerJ. LueckD. W. GerdesS. TourneurB. Di RuzzaGino BollaD. E. PellettA. SchmidtN. KrumnackK. S. McfarlandChuan-ming LiuPaolo AzzurriM. HeckM. MathisS. PashapourA. ApresyanMaria Agnese CiocciC. DionisiC. Cuenca AlmenarC. Cuenca AlmenarE. BrubakerKeunchang ChoJ. LysG. PunziC. M. GinsburgJ. KeungD. TorrettaC. MesropianVyacheslav KrutelyovJ. MülmenstädtT. SuzukiP. F. ShepardS. H. OhM. BinkleyT. KuboFumihiko UkegawaS. B. KimA. ElaginR. RoserIvan VilaJay DittmannM. G. AlbrowA. LoginovA. B. WicklundI. BizjakD. CauzA. SemenovM. LoretiAntonio SidotiD. ClarkClaudio LuciK. K. JooE. E. SchmidtD. StentzD. DagenhartH. S. BuddF. VázquezF. VázquezT. MiaoReisaburo TanakaGuido VolpiD. ChokheliG. P. Di GiovanniK. GibsonKevin LannonKevin LannonO. GonzálezWolfgang WagnerD. HirschbuehlXin WuT. MasubuchiN. S. LockyerE. ThomsonMichele GallinaroK. TerashiNicola TuriniR. St. DenisA. T. LaasanenRoberto RossinItsuo NakanoJ. E. JungS. DonatiAlan GarfinkelKenichi HatakeyamaGuenakh MitselmakherJochen Jens HeinrichC. PausM. FranklinP. McintyreT. LiuGuillelmo Gomez-ceballosJ. AntosJ. AntosG. A. ThompsonI. K. FuricC. P. MarinoE. RogersA. SohaD. KropA. N. SisakyanA. T. GoshawJ. C. FreemanA. RuizMarkus FrankW. BadgettD. MacqueenH. GerberichGiuseppe LatinoM. MussiniA. PapaikonomouS. Z. ShalhoutB. KnutesonMark NeubauerFabrizio MargaroliSubir SarkarR. OravaZ. Gunay-unalanKatsufumi SatoFrank WürthweinS. R. HouG. LunguR. D. FieldS. ErredeYasuyoshi NagaiFrancesco CrescioliAndreas WarburtonJ. DengL. E. KirschRicardo EusebiR. MadrakJ. NaganomaEva HalkiadakisI. ShreyberMalte RenzAmitabh LathAnna SfyrlaPaola GiannettiB. A. BarnettGiorgio ApollinariTeruki KamonP. MazzantiCraig BlockerKaori MaeshimaH. S. LeePaolo MastrandreaP. WilsonJ. E. GarciaMatteo Cavalli-sforzaGervasio GomezAndrey KorytovD. J. KongT. MaruyamaR. TakashimaB. CarlsP. LukensP. MehtalaW. T. FedorkoM. MartinezA. S. ThompsonT. R. JunkY. ZhengY. ZhengJ. YohAnyes TaffardAnyes TaffardS. BurkeG. L. StryckerM. J. ShochetL. DemortierS. DubeA. Savoy-navarroFrank ChlebanaL. PineraS. MaldeH. H. WilliamsKoji YamamotoY. ShonA. Manousakis-katsikakisG. IntrozziY. TuSergo JindarianiP. K. TengJ. BudagovW. AshmanskasSudhir MalikM. VidalMarco TrovatoR. L. LanderP. B. RentonS. S. YuP. WittichP. WittichM. KurataAndrew IvanovDaniela BortolettoP. E. KarchinA. CastroC. FerrazzaA. ArtikovVictoria Jane MartinVictoria Jane MartinF. PtohosF. PtohosMatthew HerndonM. K. JhaR. J. TesarekM. HusseinS. RolliBenjamin KilminsterBarry BlumenfeldShih-chieh HsuS. ShiraishiS. KwangD. H. KimS. R. HahnD. Waters

subject

PhysicsSemileptonic decayNuclear and High Energy PhysicsMuonMeson010308 nuclear & particles physicsBranching fractionHigh Energy Physics::PhenomenologyAnalytical chemistryParticle Data GroupLambda01 natural sciences0103 physical sciencesHigh Energy Physics::ExperimentB meson010306 general physicsBar (unit)

description

This article presents the first measurement of the ratio of branching fractions B(Lambda(0)(b) -> Lambda(+)(c) mu(-) (nu) over bar (mu))/B(Lambda(0)(b) -> Lambda(+)(c) pi(-)). Measurements in two control samples using the same technique B((B) over bar (0) -> D+ mu(-) (nu) over bar (mu))/B((B) over bar (0) -> D+ pi(-)) and B((B) over bar (0) -> D*(2010)(+) mu(-) (nu) over bar (mu))/B((B) over bar (0) -> D*(2010)(+) pi(-)) are also reported. The analysis uses data from an integrated luminosity of approximately 172 pb(-1) of p (p) over bar collisions at root s = 1: 96 TeV, collected with the CDF II detector at the Fermilab Tevatron. The relative branching fractions are measured to be B(Lambda(0)(b) -> Lambda(+)(c) mu(-) (nu) over bar (mu))/B(Lambda(0)(b) -> Lambda(+)(c) pi(-)) = 16.6 +/- 3.0(stat) +/- 1.0(syst) (+2.6)(-3.4) (PDG) +/- 0.3(EBR), B((B) over bar (0) -> D+ mu(-) (nu) over bar (mu))/B((B) over bar (0) -> D+ pi(-)) = 9.9 +/- 1.0(stat) +/- 0.6(syst) +/- 0.4(PDG) +/- 0.5(EBR), and B((B) over bar (0)-> D*(2010)(+) mu(-) (nu) over bar (mu))/B((B) over bar (0) -> D*(2010)(+) pi(-)) = 16.5 +/- 2.3(stat) +/- 0.6(syst) +/- 0.5(PDG) +/- 0.8(EBR). The uncertainties are from statistics (stat), internal systematics (syst), world averages of measurements published by the Particle Data Group or subsidiary measurements in this analysis (PDG), and unmeasured branching fractions estimated from theory (EBR), respectively. This article also presents measurements of the branching fractions of four new Lambda(0)(b) semileptonic decays: Lambda(0)(b) -> Lambda(c)(2595)(+) mu(-) (nu) over bar (mu), Lambda(0)(b) -> Lambda(c)(2625)(+) mu(-) (nu) over bar (mu), Lambda(0)(b) -> Sigma(c)(2425)(0) pi(+) mu(-) (nu) over bar (mu) , and Lambda(0)(b) -> Sigma(c)(2455)(++) pi(-) mu(-) (nu) over bar (mu), relative to the branching fraction of the Lambda(0)(b) -> Lambda(+)(c) mu(-) (nu) over bar (mu) decay. Finally, the transverse-momentum distribution of Lambda(0)(b) baryons produced in p (p) over bar collisions is measured and found to be significantly different from that of (B) over bar (0) mesons, which results in a modification in the production crosssection ratio sigma(Lambda b0)/sigma((B) over bar0) with respect to the CDF I measurement.

yearjournalcountryeditionlanguage
2009-02-06Physical Review D
https://doi.org/10.1103/physrevd.79.032001