6533b828fe1ef96bd1288d6d

RESEARCH PRODUCT

Observation ofJ/ψpResonances Consistent with Pentaquark States inΛb0→J/ψK−pDecays

A. Romero VidalA. SemennikovYejin ZhangS. GregsonMaximilien ChefdevilleI. NastevaI. ShapovalA. DovbnyaM. N. MinardJ. J. WalshDaniel Patrick O'hanlonF. MeierA. A. AffolderG. D. LaffertyJ. AndersonA. VallierP. HenrardK. WyllieWojciech KucewiczCheryl PappenheimerG. TellariniC. LangenbruchPierre BilloirM. BaalouchYu. GuzD. DecampMarkus FrankKarlis DreimanisP. De SimoneS. T. HarnewM. MerkC. J. G. OnderwaterS. EsenGianluigi CasseN. TuningViolaine BelleeR. CalabreseF. BlancR. LefèvreE. JansA. JaegerG. PensoP. M. ManningHans DijkstraF. F. JingMarco SantimariaI. LongstaffC. GasparAndreas WeidenGiovanni CarboniJing WangU. EitschbergerR. CurrieG. GrazianiS. Hansmann-menzemerP. N. Y. DavidDavid GasconM. S. RangelLiupan AnA. MazurovB. SpaanP. Vazquez RegueiroP. MorawskiW. BoniventoA. SchopperM. HeßJ. García PardiñasR. LindnerJ. ClosierR. Silva CoutinhoPatrick RobbeM. RotondoK. KreplinF. KruseT. HeadO. KochebinaP. SpradlinJ. PrisciandaroA. MassafferriB. Osorio RodriguesL. ZhongF. Martinez VidalR. MountainH. L. SnoekJ. A. Hernando MorataL. ZhangY. N. GaoG. CollazuolX. Cid VidalM. LilesT. M. KarbachA. SattaNicolas DéléageN. RauschmayrT. BirdUlrik EgedeS. StoicaWojciech KrzemienDiego Alejandro MilanesM. J. MorelloMarianna FontanaTjeerd KetelRoel AaijMarco AdinolfiD. Martinez SantosP. PerretJ. A. De VriesO. Aquines GutierrezSergey BarsukC. JoramMorgan MartinT. LesiakMichal KrepsG. VenezianoMarco CattaneoBenedetto Gianluca SiddiMark WhiteheadV. ShevchenkoC. SatrianoMax NeunerSilvia BorghiB. JostJ. BentonG. AuriemmaA. ContuP. SailC. PotteratP. DuranteJ. ToddV. GibsonJ. FuM. KaracsonT. E. LathamJonas RademackerOlivier LeroyW. KansoI. El RifaiB. LeveringtonDenis DerkachM. ChrzaszczF. Ferreira RodriguesStefano ZucchelliL. GiubegaC. VoßL. Castillo GarciaWilliam BarterE. GreeningSimon AkarM. Cruz TorresStephen M. StahlA. Di CantoAngelo CarbonePatrick KoppenburgJaap VelthuisT. RufS. DonleavyV. HeijneJ. Garra TicoN. NeufeldCameron Thomas DeanL. CarsonSvende BraunR. F. KoopmanC. HaenE. Van HerwijnenC. HadjivasiliouA. GianelleSandro CadedduC. BozziMichael KolpinEugenia PriceMarco ClemencicMohamad KozeihaC. ProuveM. RamaF. FontanelliO. SteinkampM. P. WilliamsG. LanfranchiA. D. NguyenD. MelnychukS. MaldeR. EkelhofA. VorobyevF. DordeiF. J. P. SolerK. TrabelsiGiulio GazzoniTara ShearsI. RaniukM. CoombesAnton PoluektovLorenzo SestiniMarta CalviS. AliC. ThomasS. C. HainesA. HicheurGiulia MancaXavier Vilasis-cardonaJ. MccarthyN. TorrAnita NandiR. SantacesariaA. DavisO. SchneiderMaxime SchubigerAlexander LeflatE. CognerasD. LacarrereA. MordàL. PescatoreJ. BeddowJ. WimberleyE. FurfaroB. PopoviciR. NietA. VollhardtMoritz DemmerD. LambertIgnacio BediagaM. MccannD. Martins TostesKarol HennessyC. MatteuzziJulien CoganS. A. WottonRudolf OldemanG. D. PatelM. CharlesMichael AlexanderB. DeyA. McnabC. LazzeroniM. MeissnerR. MatevPh. CharpentierKonrad KlimaszewskiAlessio SartiAlexander MalininZishuo YangRoland BernetA. Gallas TorreiraVarvara BatozskayaE. Picatoste OlloquiS. WandernothJ. RouvinetM. PalutanP. D'argentR. McnultyP. KrokovnyM. TeklishynV. V. GligorovG. KrockerA. B. RodriguesAndrew CrocombeZ. MatheP. FolD. VolyanskyyCh. CauetClaudia VaccaG. WilkinsonL. ShekhtmanA. Dosil SuárezDmitry GolubkovS. KarodiaP. NaikRoger FortySai-juan ChenJ. Van TilburgT. BrittonSimone BifaniM. Vieites DiazE. SantovettiE. TournefierS. ReichertJohn William RonayneLucio AnderliniD. VieiraOscar De Aguiar FranciscoAlbert BurscheA. MapelliL. GarridoC. BaessoSrikanth SridharanDaniel Martin SaundersV. BocciM. SchmellingPhilip IltenM. FrosiniLucian CojocariuI. PolyakovS. RoiserT. NikodemB. SchmidtF. StagniGiulio DujanyPaul SeyfertJ. JalochaVictor CocoIvan BelyaevA. BertolinV. EgorychevA. ArtamonovRoberta CardinaleA. PopovI. R. KenyonM. PappagalloAbhijit MathadRoger BarlowD. PinciAlbert Comerma-montellsA. LusianiS. Topp-joergensenJan BuytaertV. Salustino GuimaraesB. RachwalM. Plo CasasusMarco DorigoJ. H. LopesAndrey TayduganovF. Di RuscioA. PapanestisM. VesterinenJanine MüllerS. GianìTobias TekampeM. PatelA. GrecuC. Marin BenitoDmitry PopovC. Vázquez SierraT. GysLouis HenryAxel Kevin KuonenJ. PanmanC. BarschelS. BluskS. TourneurIwan Thomas SmithL. SunAndrey UstyuzhaninBernardo AdevaV. RomanovskyK. De BruynJ. HarrisonF. PolciA. Puig NavarroV. Fernandez AlborHal EvansTomasz FiutowskiZhirui XuKlaus FohlE. BowenNikolay BondarM. DeckenhoffA. DzyubaP. CollinsMark Richard James WilliamsSlavomira StefkovaMikhail ZavertyaevW. QianChung Nguyen-mauN. K. WatsonD. TonelliSophie RichardsV. Rives MolinaS. KlaverA. BayRobert ApplebyS. KandybeiF. PalomboTimothy EvansJ. J. Saborido SilvaPaolo GandiniF. DupertuisWander BaldiniP. Alvarez CartelleO. OkhrimenkoThemistocles BowcockM. MussiniChristian FärberD. Campora PerezV. KudryavtsevA. DziurdaD. HyndsD. GalliJ. MaratasM. M. ReidR. Graciani DiazD. R. WardP. Rodriguez PerezCarmelo D'ambrosioJean François MarchandSandra AmatoNeville HarnewDavid GerickOleg StenyakinC. FitzpatrickA. SciubbaJeremy DalsenoS. WrightR. CenciXiaoxue HanT. PilařMarina ArtusoA. ZhokhovA. BadalovS. AmerioW. WislickiM. CorvoB. T. MeadowsJ. Van LeerdamG. RavenStephane T'jampensL. Del BuonoJolanta BrodzickaKurt RinnertM. SirendiS. SwientekM. ZangoliLorenzo CapriottiP. GriffithJ. P. LeesLennaert BelG. AlkhazovP. TsopelasM. SchluppA. GolutvinRf FayH. LuoA. JawaheryM. Grabalosa GándaraFederico RediLaurent DufourAnna LupatoM. BritschN. LusardiJ. MarksC. PatrignaniL. GrilloSebastian NeubertM. StraticiucC. KhurewathanakulS.i. EidelmanM. D. SokoloffAndrea BizzetiC. Santamarina RiosS. MonteilG. MartellottiE. S. SmithV. TisserandM. AndreottiG. A. CowanManuel SchillerS. OgilvyB. GuiJ. M. YuA. ShiresB. HamiltonO. MaevTomasz SkwarnickiAngelo GeraciM. ShapkinSean BensonY. ShcheglovW. D. HulsbergenKonstantinos PetridisJ. A. Rodriguez LopezS. TolkT. KvaratskheliyaNicola SerraNicoletta BelloliRenato QuaglianiSebastian BachmannA. PalanoTomasz SzumlakMartino BorsatoV. ObraztsovM. Lucio MartinezStephan EisenhardtS. CunliffeU. MarconiK. KurekM. HoballahF. F. WilsonG. CiezarekF. SoomroR. Vazquez GomezR. JacobssonMarc-olivier BettlerU. StraumannG. CavalleroElena GraveriniThibaud HumairC. GöbelJ. E. AndrewsOlivier DeschampsG. MancinelliFlavio ArchilliG. ValentiA. GomesL. A. Granado CardosoD. WebsdaleM. Pepe AltarelliF. MaciucS. VecchiB. CouturierD. SouzaN. H. BrookMarco FioreDavid LohP. SzczypkaP. OwenA. TsaregorodtsevXia-ji LiuSheldon StoneN. ChiapoliniAlessio PiucciMarco GersabeckYasmine AmhisJ. BlouwMatthew KelseyTatiana LikhomanenkoStefano GalloriniGuido AndreassiAgnieszka Oblakowska-muchaPietro MarinoG. WormserA. NovoselovMarcin KucharczykS. HallM. MorandinMark WilkinsonRoland WaldiMariana RihlM. SmithD. R. JohnsonS. FilippovK. MüllerB. X. LiuJ. M. Otalora GoicocheaJohn BackG. PassalevaB. LanghansV. VorobyevI. O. SkillicornC. R. JonesM. H. SchuneU. UwerV. SyropoulosE. Ben-haimM. Ferro-luzziJ. SerranoL. L. PappalardoG. PunziE. ThomasM. TobinKrzysztof SwientekThomas N. WilliamsFrancesco DettoriFranco BedeschiE. GersabeckB. PietrzykYang LiS. EasoMiroslaw FirlejV. NiessN. HussainVioletta CogoniP. CampanaTimon SchmelzerElena Dall'occoPaolo CarnitiAlexander BerezhnoyL. KravchukAlessandro CardiniA. FalabellaBiagio SaittaR. WallaceJ. M. De MirandaN. SkidmoreC. WallaceL. TomassettiNathan JurikD. LucchesiB. Souza De PaulaE. GraugesA. UklejaD. NinciF. MachefertC. HombachAntonio PellegrinoMatthieu KeckeS. CoquereauE. PolycarpoTatsuya NakadaA. PritchardG. BencivenniDominik Stefan MitzelClaudio GottiG. SimiB. Sanmartin SedesA. OttoTuomas PoikelaBarbara SciasciaB. MusterS. StrackaV. VagnoniE. LuppiC. ParkesSilvia GambettaJakub MoronJ. Molina RodriguezAdam Benjamin MorrisS. RicciardiChristoph FreiR. NandakumarLaura GavardiD. DossettVincenzo BattistaS. PerazziniS. FarryW. SutcliffeJ. HeL. BeaucourtA. PetroliniMarco PetruzzoMatthew KenzieMarian StahlA. PistoneF. TeubertJ. LefrançoisE. RodriguesN. NeriL. De PaulaFederica LionettoAlex BirnkrautD. E. HutchcroftD. VoongO. YushchenkoR. Le GacA. BienNathanael FarleyA. A. AlvesM. WitekM. NeedhamJohannes AlbrechtI. KomarovMalcolm JohnM. GandelmanR. DzhelyadinA. LaiAndrea MauriA. PearceM. TreschE. GushchinC. LinnR. SchwemmerK. Carvalho AkibaF. MuheimM. VeltriG. HaefeliJ. R. SmithValery PugatchA. ZhelezovC. Sanchez MayordomoH. V. CliffFederico AlessioCh. ElsasserO. LuptonM. T. TranR. GauldI. A. MonroyT. J. GershonElie AslanidesA. CookD. FergusonS. PlayferFrank FerrariMassimiliano FioriniOlivier Göran GirardPh. GhezKevin MaguireJ. D. PriceB. StoraciA.e. BondarA. OyangurenD. C. CraikBasem KhanjiY. XieThomas BlakeH. SchindlerMarek IdzikP. Ruiz VallsThomas HadavizadehM. De CianM. Van BeuzekomScott ElyO. GrünbergXuhao YuanM. Calvo GomezG. CortiJ. WishahiBrice MaurinD. HillMaurizio MartinelliM. SzczekowskiS. De CapuaNikolay NikitinD. SavrinaAna TrisovicP. E. L. ClarkeA. C. Dos ReisLars EklundVanessa MüllerZiad AjaltouniS. StevensonT. D. NguyenS.-f. CheungB. ViaudN. SagidovaL. Cassina

subject

PhysicsParticle physicsMeson010308 nuclear & particles physicsHadronGeneral Physics and AstronomyParity (physics)Exotic hadron01 natural sciencesPentaquarkBaryonNuclear physicsAmplitude0103 physical sciencesMass spectrumHigh Energy Physics::Experiment10. No inequality010306 general physics

description

Observations of exotic structures in the J/ψp channel, that we refer to as pentaquark-charmonium states, in Λ0b→J/ψK−p decays are presented. The data sample corresponds to an integrated luminosity of 3/fb acquired with the LHCb detector from 7 and 8 TeV pp collisions. An amplitude analysis is performed on the three-body final-state that reproduces the two-body mass and angular distributions. To obtain a satisfactory fit of the structures seen in the J/ψp mass spectrum, it is necessary to include two Breit-Wigner amplitudes that each describe a resonant state. The significance of each of these resonances is more than 9 standard deviations. One has a mass of 4380±8±29 MeV and a width of 205±18±86 MeV, while the second is narrower, with a mass of 4449.8±1.7±2.5 MeV and a width of 39±5±19 MeV. The preferred JP assignments are of opposite parity, with one state having spin 3/2 and the other 5/2.

yearjournalcountryeditionlanguage
2015-08-12Physical Review Letters
https://doi.org/10.1103/physrevlett.115.072001