Observation of J / Structures Consistent with Exotic States from Amplitude Analysis of B+ j /K+ Decays

The first full amplitude analysis of B þ → J= ψϕ K þ with J= ψ → μ þ μ − , ϕ → K þ K − decays is performed with a data sample of 3 fb − 1 of pp collision data collected at ffiffiffi s p ¼ 7 and 8 TeV with the LHCb detector. The data cannot be described by a model that contains only excited kaon states decaying into ϕ K þ , and four J= ψϕ structures are observed, each with significance over 5 standard deviations. The quantum numbers of these structures are determined with significance of at least 4 standard deviations. The lightest has mass consistent with, but width much larger than, previous measurements of the claimed X ð 4140 Þ state.

I. Babuschkin | F. Fleuret | F. Bedeschi | M. Beuzekom | C. Frei | E. Cogneras | T. Bowcock | D. Derkach | J. Brodzicka | T. Gershon | M. Corvo | C. Gaspar | V. Gligorov | P. Billoir | V. Bocci | W. Bonivento | M. Calvi | P. Charpentier | H. Dijkstra | F. Fontanelli | J. Cogan | G. Alkhazov | S. Eidelman | D. Decamp | P. Ghez | Z. Ajaltouni | S. Cadeddu | E. Grauges | C. Bozzi | M. Chefdeville | L. Garrido | G. Bencivenni | P. Campana | M. Cattaneo | E. Ben-Haim | G. Auriemma | T. Fiutowski | A. Grecu | G. Cowan | M. Chrzaszcz | S. Cunliffe | C. Elsasser | F. Blanc | G. Casse | A. Bizzeti | G. Collazuol | I. Belyaev | S. Easo | G. Corti | S. Akar | J. Albrecht | Federico Alessio | M. Alexander | S. Ali | Y. Amhis | L. Anderlini | G. Andreassi | F. Archilli | M. Artuso | E. Aslanides | S. Bachmann | W. Baldini | R. Barlow | S. Barsuk | W. Barter | V. Batozskaya | B. Batsukh | V. Battista | J. Beddow | I. Bediaga | N. Belloli | S. Benson | A. Berezhnoy | R. Bernet | F. Betti | I. Bezshyiko | S. Bifani | A. Birnkraut | T. Blake | S. Blusk | T. Boettcher | M. Borisyak | M. Borsato | F. Bossù | M. Boubdir | E. Buchanan | C. Burr | A. Bursche | R. Calabrese | L. Capriotti | A. Carbone | R. Cardinale | A. Cardini | P. Carniti | L. Cassina | G. Cavallero | R. Cenci | G. Chatzikonstantinidis | S. Chen | V. Chobanova | G. Ciezarek | M. Clemencic | J. Closier | V. Coco | L. Cojocariu | S. Coquereau | B. Couturier | D. Craik | A. Crocombe | R. Currie | M. Cian | J. Miranda | M. Serio | P. Simone | M. Demmer | O. Deschamps | F. Dettori | B. Dey | A. Canto | F. Dordei | A. Dovbnya | K. Dreimanis | G. Dujany | P. Durante | R. Dzhelyadin | A. Dziurda | A. Dzyuba | V. Egorychev | S. Eisenhardt | U. Eitschberger | R. Ekelhof | L. Eklund | S. Ely | S. Esen | T. Evans | A. Falabella | N. Farley | S. Farry | D. Fazzini | M. Ferro-Luzzi | S. Filippov | M. Fiorini | M. Firlej | F. Fleuret | S. Gallorini | S. Gambetta | M. Gandelman | P. Gandini | L. Gavardi | G. Gazzoni | D. Gerick | E. Gersabeck | M. Gersabeck | V. Gibson | L. Giubega | K. Gizdov | A. Golutvin | A. Gomes | C. Gotti | E. Graverini | G. Graziani | P. Griffith | L. Grillo | T. Hadavizadeh | L. Henry | S. Amato | S. Gianì | C. Fitzpatrick | K. Akiba | L. Paula | F. Rodrigues | L. Buono | J. Blouw | G. Carboni | X. Vidal | A. Torreira | V. Gligorov | A. Gomes | L. Beaucourt | M. Baalouch | C. Cauet | M. Deckenhoff | M. Britsch | V. Cogoni | M. Fiore | E. Furfaro | A. Badalov | M. C. Gomez | R. Diaz | P. Cartelle | V. Albor | J. Pardiñas | C. Barschel | D. Perez | L. Cardoso | M. Dorigo | E. Bowen | K. Bruyn | J. Benton | A. Cook | H. Evans | T. Bird | S. Capua | T. Britton | C. Baesso | O. Gutierrez | A. G. Torreira | J. G. Ticó | O. Francisco | L. Henry | R. Fay | A. Borgheresi | P. Garsed | F. Ferrari | K. Dungs | N. Déléage | A. Suárez | A. Bitadze | A. Bertolin | Sergey Filippov | A. Artamonov | A. Bondar | M. Gándara | E. Dall | Occo | F. Blanc | V. Gibson | C. Bozzi | C. Sobral | R. Barlow | S. Braun | C. Hadjivasiliou | N. Harnew | J. Buytaert | A. Davis | Y. Gao | J. Romeu | L. García | S. Eidelman | N. Bondar | F. Bossu | K. Dungs | D. Gascón | V. Bellee | J. Dalseno | D. Galli | D. Golubkov | A. Bitadze | T. Gershon | P. Ghez | G. Bencivenni | J. Miranda | J. G. Pardiñas | O. A. Gutierrez | E. Ben-Haim | R. Bernet | T. Blake | E. Bowen | R. Calabrese | G. Carboni | J. Cogan | D. Derkach | N. Farley | M. Fiore | D. Galli | C. Gaspar | E. Graugés | L. Grillo | Y. Gao | G. Auriemma | H. Dijkstra | A. Dovbnya | F. Ferrari | M. Borsato | S. Cunliffe | P. Garsed | J. Beddow | A. Borgheresi | A. D. Suárez | A. Falabella | F. Fontanelli | M. G. Gándara

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