Observation of New Resonances Decaying to J/ψK^{+} and J/ψϕ.

R Aaij ,C Patrignani ,A Beiter ,V Egorychev ,D Brundu ,O Kitouni ,R A Mohammed ,R Santacesaria ,X Yuan ,L M Greeven ,S Bifani ,L Garrido ,H Cai ,H Stevens ,M Bjørn ,R D Moise ,V Balagura ,F Suljik ,M P Blago ,F Archilli ,T Kirn ,L R Madhan Mohan ,R Forty ,O Schneider ,A Mödden ,M Mazurek ,R Le Gac ,A Obłąkowska-Mucha ,G Passaleva ,K A Zarebski ,B Delaney ,P Li ,T Lesiak ,K Klimaszewski ,J M Basels ,E Millard ,P Gandini ,Igor Slazyk ,L Minzoni ,A Sciubba ,G Simi ,B Spaan ,P Carniti ,S Gambetta ,D Pinci ,T Gaintseva ,Artur Ishteev ,P J Marshall ,J S Butter ,C Nunez ,T Skwarnicki ,H Sazak ,R Nandakumar ,D Maisuzenko ,P Krokovny ,P Stefko ,A Petrov ,D C Craik ,C Trippl ,D Manuzzi ,M Fontana ,Ia Bezshyiko ,G Lanfranchi ,R Vazquez Gomez ,L Cojocariu ,R Graciani Diaz ,S Maccolini ,M Cruz Torres ,M Zavertyaev ,N Sagidova ,R A Fini ,M Ramos Pernas ,O Lupton ,S Baker ,L E Yeomans ,C Nguyen-Mau ,L Kravchuk ,O Stenyakin ,R Lane ,S Akar ,M Frank ,A G Morris ,C J Parkinson ,A Mathad ,J D Shupperd ,L Congedo ,M Van Beuzekom ,A Ene ,T Latham ,A Ukleja ,B Schmidt ,B Jost ,F Maciuc ,G Mancinelli ,E Vilella Figueras ,D S Mitzel ,W Barter ,R Waldi ,G Cavallero ,Mario Edgardo Olivares ,G Chatzikonstantinidis ,G Punzi ,L Del Buono ,A Satta ,T H Hancock ,F Lazzari ,C Pappenheimer ,P Perret ,T Evans ,A Papanestis ,M J Bradley ,M Schmelling ,D Golubkov ,C Santamarina Ríos ,B Meadows ,C Matteuzzi ,M D Sokoloff ,Ao Xu ,M Schiller ,Ph Ghez ,S Filippov ,F J P Soler ,C H Murphy ,M Ferrillo ,E Gabriel ,G Coombs ,N Kazeev ,S Bachmann ,Thi Thuy Hang Pham ,S Esen ,D Pereima ,C L Da Silva ,A Bursche ,J M Fernandez-Tenllado Arribas ,C Chen ,J Cerasoli ,T J V Bowcock ,H Mu ,M Giovannetti ,L Carus ,T Maltsev ,L Giubega ,K Müller ,S Ferreres Sole ,P Robbe ,C Sanchez Gras ,S Ponce ,J M Durham ,S Monteil ,Y Luo ,A Butkevich ,A Merli ,C Gotti ,L Li ,M Wilkinson ,M Hilton ,J Marks ,D Hynds ,F Kress ,D Müller ,L Eklund ,Y Fan ,M Firlej ,O Yushchenko ,M Chrząszcz ,B K Jashal ,A Buonaura ,T Kvaratskheliya ,F Martínez Vidal ,N Cooke ,A Poluektov ,M Chefdeville ,R Silva Coutinho ,J Qin ,I Nasteva ,K Petridis ,S Bhasin ,A Golutvin ,S Schael ,M P Williams ,T Grammatico ,C Fitzpatrick ,I Gorelov ,E L Gkougkousis ,O Zenaiev ,A C Dos Reis ,A Bizzeti ,G Robertson ,A Lai ,F Machefert ,P M Hamilton ,S Neubert ,A Cardini ,S Mariani ,S Aiola ,C Vázquez Sierra ,F Pisani ,E Spadaro Norella ,S Easo ,И Белов ,D Vieira ,D Fazzini ,S Hansmann-Menzemer ,D Torres Machado ,N Serra ,D Hill ,F Alessio ,V Lukashenko ,F Bedeschi ,Yifan Yang ,K De Bruyn ,O De Aguiar Francisco ,M Idzik ,A Mcnab ,S Eisenhardt ,К Ившин ,B Dey ,C Hasse ,O Deschamps ,D Ilin ,S Koliiev ,N Skidmore ,S De Capua ,H Dijkstra ,S Ricciardi ,F A Garcia Rosales ,Olga Madejczyk ,S Tolk ,D Saranin ,P Vincent ,T Harrison ,C R Jones ,G Haefeli ,L Anderlini ,G Vitali ,L A Granado Cardoso ,S Klaver ,A Lupato ,M Santimaria ,C Gu ,S Capelli ,Tamaki Holly Mcgrath ,L Dieste Maronas ,V Renaudin ,E Epple ,P Mackowiak ,E Rodrigues ,J Wang ,Sergio Gómez 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Desse ,F Polci ,M Piccini ,L De Paula ,C J Pawley ,Z P Xu ,E Gersabeck ,D De Simone ,J J Back ,W Byczynski ,E M Niel ,Thomas Peter Jones ,T D Nguyen ,J J Lane ,M Vesterinen ,V Vagnoni ,G Frau ,A Pastore ,L M Garcia Martin ,J Eschle ,M Van Veghel ,M F Cicala ,J Walsh ,S Kandybei ,S Didenko ,A Sergi ,D Sanchez Gonzalo ,G Bassi ,C J G Onderwater ,Ekaterina Trifonova ,M Slater ,N Harnew ,A Fernández Prieto ,J A De Vries ,Zhiyu Xiang ,M Witek ,P Marino ,D Melnychuk ,F Blanc ,M Sarpis ,Y Zhang ,A Oyanguren ,M Franco Sevilla ,C Betancourt ,L Mcconnell ,S Gromov ,C Wang ,M S Bieker ,C Bertella ,H R Wu ,S Zhang ,M Schubiger ,V Placinta ,M E Stramaglia ,L Soares Lavra ,F Stagni ,J Heuel ,T Ketel ,Y P Lu ,S Zucchelli ,S Cadeddu ,K Heijhoff ,B Garcia Plana ,M Borsato ,P D’argent ,V Pugatch ,A Brea Rodríguez ,M Zdybał ,M Traill ,V Gibson ,Y Wang ,R J Hunter ,L Henry ,X Liang ,H.-P Dembinski ,G H Lovell ,A Leflat ,R Bernet ,C Haen ,J Lomba Castro ,S G Weber ,I Solovyev ,K R Mattioli ,J Moroń ,H Schindler ,A Bertolin ,V Franco Lima ,R Mcnulty ,P Griffith ,F Teubert ,M Mukherjee ,V Chulikov ,M Atzeni ,A B Morris ,J Hu ,X Vilasis‐Cardona ,M Pepe Altarelli ,A Venkateswaran ,A Dzyuba ,M Karacson ,W Funk ,O Boente García ,T Mombächer ,A Chubykin ,A Dziurda ,T Ruf ,L Grillo ,A Andreianov ,W Hulsbergen ,S Borghi ,A Kharisova ,M Calvi ,S Celani ,A Inglessi ,M G Chapman ,W Hu ,E Aslanides ,V Denysenko ,G Sarpis ,X Han ,F Ferrari ,Y Zheng ,D P O’hanlon ,Д Деркач ,E Dall’occo ,L Calero Diaz ,G Manca ,A Piucci ,M Gandelman ,J M De Miranda ,Z Li ,A Brossa Gonzalo ,C B Van Hulse ,H V Cliff ,J García Pardiñas ,E Ben-Haim ,H Li ,N Meinert ,G Wormser ,R Litvinov ,R Currie ,A Petrolini ,Di Yang ,M Birch ,Z Ajaltouni ,C A Aidala ,S Blusk ,S Kholodenko ,G Tuci ,S Kotriakhova ,Ilaria Neri ,J J Velthuis ,A Schopper ,T Shears ,R Lindner ,S Braun ,P N Swallow ,A Szabelski ,Feng Jiang ,A M Hennequin ,Vladimir Gligorov ,M Bartolini ,D Lancierini ,Y Pan ,M J Morello ,B G Siddi ,S Stahl ,P Seyfert ,S Eidelman ,M Artuso ,J Ryżka ,S Barsuk ,E Gushchin ,G Morello ,A Ossowska ,D Murray ,B Sciascia ,G Bencivenni ,A Gioventù ,E Polycarpo ,Q Han ,B Audurier ,P Owen ,V S Kirsebom ,S Legotin ,C A Chavez Barajas ,B Małecki ,U Marconi ,H Viemann ,T Blake ,P Durante ,J Sun ,S Ely ,A Ustyuzhanin ,M Schellenberg ,M Martinelli ,D Johnson ,Zishuo Yang ,H Pullen ,S Meloni ,K M Fischer ,E B Shields ,W Krupa ,J He ,A Vorobyev ,S Maddrell-Mander ,L Witola ,M Hatch ,A Bitadze ,A Camboni ,D Zhang ,Z Ren ,F Ferreira Rodrigues ,W Baldini ,Jan Langer ,B R Gruberg Cazon ,J Haimberger ,L Lopes ,Aleksandr Solovev ,T Gershon ,B Couturier ,A Philippov ,A Falabella ,F Fleuret ,X Cid Vidal ,D Bobulska ,M Goncerz ,J A Boelhauve ,M Adinolfi ,V Coco ,S Taneja ,S H Lee ,J Baptista De Souza Leite ,Yu Guz ,P Naik ,V Lisovskyi ,M Charles ,T Gys ,V Belavin ,P Ciambrone ,Guanghua Gong ,P Baladrón Rodríguez ,Y Yao ,C Gaspar ,A Loi ,S Malde ,G Raven ,L Xu ,M Fiorini ,M S Rangel ,D Dutta ,W Parker ,M Garau ,P Muzzetto ,A Palano ,C Weisser ,G Ciezarek ,M Tobin ,Y Gao ,M Patel ,S E Hollitt ,L Sun ,J Fu ,N Bondar ,Peter Švihra ,M Clemencic ,S Ek-In ,A Pearce ,T Halewood-Leagas ,R Jacobsson ,A Danilina ,Zhihong Shen ,S Luchuk ,M Vieites Diaz ,L Dufour ,D Galli ,R Calabrese ,J Mauricio ,S Stone ,T Ackernley ,G Panshin ,R Manera Escalero ,Resmi P K ,M Morandin ,J Brodzicka ,S A Wotton ,S Schulte ,R I Rabadán Trejo ,J Crkovská ,D Zuliani ,R Lefèvre ,P Spradlin ,P Kravchenko ,V Maćko ,S Escher ,M Smith ,Е Говоркова ,V Matiunin ,L Shchutska ,Henryk Karol Giemza ,T Szumlak ,U Egede ,R Mountain ,B Saitta ,R Schwemmer ,M.-N Minard ,P Kopciewicz ,D J Unverzagt ,M Hecker ,N K Watson ,M Zeng ,A Vollhardt ,F F Wilson ,D M Shangase ,N Polukhina ,C T Dean ,R Matev ,L Calefice ,X Y Zhou ,M Needham ,J Buytaert ,V Duk ,P A Günther ,J Albrecht ,S Belin ,E Van Herwijnen ,I Williams ,E Smith ,R Calladine ,A Boyer ,F Muheim ,M Van Dijk ,P Billoir ,E Maurice ,F Dettori ,S Perazzini ,X Huang ,J Cogan ,B Leverington ,E Luppi ,I Belyaev ,D Gerick ,B Passalacqua ,M Féo ,C D’ambrosio ,H M Wark ,D Marangotto ,D J White ,В Жуков ,A Seuthe ,Eduard Ursov ,R J Barlow ,A Casais Vidal ,E Jans ,M Dziewiecki ,A M Donohoe ,V Vorobyev ,A Grecu ,D Lacarrère ,J Plews ,Elisabet Golobardes ,S Chen ,K Gizdov ,T Nakada ,D Popov ,P Ilten ,M Calvo Gomez ,A Jawahery ,P Garcia Moreno ,E Shmanin ,B Quintana ,L Bian ,Z Máthé ,D Y Tou ,O Leroy ,M J Tilley ,M Reboud ,N Tuning ,A S Boldyrev ,D Lucchesi ,I Kostiuk ,M W Dudek ,M Romero Lamas ,A Gomes ,L Promberger ,M T Tran ,M Cattaneo ,J P Grabowski ,Angel Fernando Campoverde Quezada ,Q J Xu ,K A Thomson ,G J Kunde ,A Hicheur ,M Veltri ,M Pili ,A Valassi ,K Heinicke ,M Andreotti ,B Rachwał ,F Goncalves Abrantes ,M Mccann ,Andrea Lampis ,A Dendek ,F Dordei ,A Snoch ,M Lucio Martínez ,P A Gorbounov ,E Cogneras ,B D C Westhenry ,E Thomas ,M Kenzie ,F Redi ,M Marinangeli ,A Zhelezov ,S Amato ,K Wyllie ,C Burr ,V Shevchenko ,C Langenbruch ,Wenqian Huang ,J A B Coelho ,M W Majewski ,J B 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doi:10.1103/physrevlett.127.082001

Abstract

The first observation of exotic states with a new quark content cc[over ¯]us[over ¯] decaying to the J/ψK^{+} final state is reported with high significance from an amplitude analysis of the B^{+}→J/ψϕK^{+} decay. The analysis is carried out using proton-proton collision data corresponding to a total integrated luminosity of 9 fb^{-1} collected by the LHCb experiment at center-of-mass energies of 7, 8, and 13TeV. The most significant state, Z_{cs}(4000)^{+}, has a mass of 4003±6_{-14}^{+4} MeV, a width of 131±15±26 MeV, and spin parity J^{P}=1^{+}, where the quoted uncertainties are statistical and systematic, respectively. A new 1^{+} X(4685) state decaying to the J/ψϕ final state is also observed with high significance. In addition, the four previously reported J/ψϕ states are confirmed and two more exotic states, Z_{cs}(4220)^{+} and X(4630), are observed with significance exceeding 5 standard deviations.

Highlights

The first observation of exotic states with a new quark content ccusdecaying to the J=ψKþ final state is reported with high significance from an amplitude analysis of the Bþ → J=ψφKþ decay
Charged states such as Zcð3900Þþ [1,2] and Zcð4430Þþ [3,4,5] provide evidence for exotic states, because light quarks are required to account for the nonzero electric charge in addition to the heavy quarkonium. (Charge conjugation is implied throughout this Letter.) Previously, only the u or d quarks were observed to constitute the light quark content of such charged exotic states, even though the existence of a Zcs state as a strangeness-flavor partner of the Zþc ð3900Þ state had been predicted [6,7,8,9,10]
The BESIII experiment reported a 5.3 standard deviation (σ hereafter) observation of a threshold structure in the mass distribution of D−s DÃ0 þ DÃs−D0 pairs produced in eþe− annihilation as recoil against a Kþ meson [11]

Summary

Introduction

The first observation of exotic states with a new quark content ccusdecaying to the J=ψKþ final state is reported with high significance from an amplitude analysis of the Bþ → J=ψφKþ decay. With run 1 data, LHCb performed the first amplitude analysis of the Bþ → J=ψφKþ decay, investigating the J=ψφ structure [12,13] in addition to the kaon excitations The data were described with seven KÃþ → φKþ resonances, four X → J=ψφ structures, and nonresonant (NR) φKþ and J=ψφ contributions.

Results

Conclusion