# Observation of the resonant character of the Z(4430)(-) state.

@article{Aaij2014ObservationOT, title={Observation of the resonant character of the Z(4430)(-) state.}, author={R. Aaij and B. Adeva and M. Adinolfi and A. Affolder and Z. Ajaltouni and J. Albrecht and F. Alessio and M. Alexander and S. Ali and G. Alkhazov and P. Alvarez Cartelle and A. A. Alves and S. Amato and S. Amerio and Y. Amhis and L. An and L. Anderlini and J. Anderson and R. Andreassen and M. Andreotti and J. Andrews and R. Appleby and O. Aquines Gutierrez and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and J. Back and A. Badalov and V. Balagura and W. Baldini and R. Barlow and C. Barschel and S. Barsuk and W. Barter and V. Batozskaya and T. Bauer and A. Bay and L. Beaucourt and J. Beddow and F. Bedeschi and I. Bediaga and S. Belogurov and K. Belous and I. Belyaev and E. Ben-Haim and G. Bencivenni and S. Benson and J. Benton and A. Berezhnoy and R. Bernet and M. Bettler and M. van Beuzekom and A. Bie{\~n} and S. Bifani and T. Bird and A. Bizzeti and P. Bj{\o}rnstad and T. Blake and F. Blanc and J. Blouw and S. Blusk and V. Bocci and A. Bondar and N. Bondar and W. Bonivento and S. Borghi and A. Borgia and M. Borsato and T. Bowcock and E. Bowen and C. Bozzi and T. Brambach and J. V. D. van den Brand and J. Bressieux and D. Brett and M. Britsch and T. Britton and J. Brodzicka and N. Brook and H. Brown and A. Bursche and G. Busetto and J. Buytaert and S. Cadeddu and R. Calabrese and M. Calvi and M. Calvo Gomez and A. Camboni and P. Campana and D. C. C{\'a}mpora P{\'e}rez and A. Carbone and G. Carboni and R. Cardinale and A. Cardini and H. Carranza-Mejia and L. Carson and K. Carvalho Akiba and G. Casse and L. Cassina and L. Castillo Garcia and M. Cattaneo and C. Cauet and R. Cenci and M. Charles and P. Charpentier and S. Chen and S. Cheung and N. Chiapolini and M. Chrzaszcz and K. Ciba and X. Cid Vidal and G. Ciezarek and P. Clarke and M. Clemencic and H. Cliff and J. Closier and V. Coco and J. Cogan and E. Cogneras and P. Collins and A. Comerma-Montells and A. Contu and A. Cook and M. Coombes and S. Coquereau and G. Corti and M. Corvo and I. Counts and B. Couturier and G. Cowan and D. Craik and M. Cruz Torres and S. Cunliffe and R. Currie and C. D’Ambrosio and J. Dalseno and P. David and A. Davis and K. De Bruyn and S. de Capua and M. De Cian and J. De Miranda and L. de Paula and W. De Silva and P. de Simone and D. Decamp and M. Deckenhoff and L. Del Buono and N. D{\'e}l{\'e}age and D. Derkach and O. Deschamps and F. Dettori and A. Di Canto and H. Dijkstra and S. Donleavy and F. Dordei and M. Dorigo and A. Dosil Su{\'a}rez and D. Dossett and A. Dovbnya and G. Dujany and F. Dupertuis and P. Durante and R. Dzhelyadin and A. Dziurda and A. Dzyuba and S. Easo and U. Egede and V. Egorychev and S. Eidelman and S. Eisenhardt and U. Eitschberger and R. Ekelhof and L. Eklund and I. El Rifai and C. Elsasser and S. Ely and S. Esen and T. Evans and A. Falabella and C. F{\"a}rber and C. Farinelli and N. Farley and S. Farry and D. Ferguson and V. Fernandez Albor and F. Ferreira Rodrigues and M. Ferro-Luzzi and S. Filippov and M. Fiore and M. Fiorini and M. Firlej and C. Fitzpatrick and T. Fiutowski and M. Fontana and F. Fontanelli and R. Forty and O. Francisco and M. Frank and C. Frei and M. Frosini and J. Fu and E. Furfaro and A. Gallas Torreira and D. Galli and S. Gallorini and S. Gambetta and M. Gandelman and P. Gandini and Y. Gao and J. Garofoli and J. Garra Tic{\'o} and L. Garrido and C. Gaspar and R. Gauld and L. Gavardi and E. Gersabeck and M. Gersabeck and T. Gershon and P. Ghez and A. Gianelle and S. Gian{\`i} and V. Gibson and L. Giubega and V. Gligorov and C. G{\"o}bel and D. Golubkov and A. Golutvin and A. Gomes and H. Gordon and C. Gotti and M. Grabalosa G{\'a}ndara and R. Graciani Diaz and L. Granado Cardoso and E. Grauges and G. Graziani and A. Grecu and E. Greening and S. Gregson and P. Griffith and L. Grillo and O. Gr{\"u}nberg and B. Gui and E. 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Rama}, journal={Physical review letters}, year={2014}, volume={112 22}, pages={ 222002 } }

Resonant structures in B^{0}→ψ^{'}π^{-}K^{+} decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3 fb^{-1} collected with the LHCb detector. The data cannot be described with K^{+}π^{-} resonances alone, which is confirmed with a model-independent approach. A highly significant Z(4430)^{-}→ψ^{'}π^{-} component is required, thus confirming the existence of this state. The observed evolution of the Z(4430)^{-} amplitude with… Expand

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