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

LHCb Collaboration; R. Aaij; B. Adeva; M. Adinolfi; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G. Alkhazov; P. Alvarez Cartelle; A. A. Alves; S. Amato; S. Amerio; Y. Amhis; L. An; L. Anderlini; J. Anderson; R. Andreassen; M. Andreotti; J. E. Andrews; R. B. Appleby; O. Aquines Gutierrez; F. Archilli; A. Artamonov; M. Artuso; E. Aslanides; G. Auriemma; M. Baalouch; S. Bachmann; J. J. Back; A. Badalov; V. Balagura; W. Baldini; R. J. Barlow; C. Barschel; S. Barsuk; W. Barter; S. Bifani; N. Farley; P. Griffith; P. Ilten; I. R. Kenyon; C. Lazzeroni; A. Mazurov; J. McCarthy; C. J. Parkinson; L. Pescatore; D. Popov; N. K. Watson

doi:10.1103/PhysRevLett.112.222002

Observation of the resonant character of the Z(4430)^- state

LHCb Collaboration, R. Aaij^*, B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, M. Alexander, S. Ali, G. Alkhazov, P. Alvarez Cartelle, A. A. Alves, S. Amato, S. Amerio, Y. Amhis, L. An, L. Anderlini, J. Anderson, R. AndreassenM. Andreotti, J. E. Andrews, R. B. Appleby, O. Aquines Gutierrez, F. Archilli, A. Artamonov, M. Artuso, E. Aslanides, G. Auriemma, M. Baalouch, S. Bachmann, J. J. Back, A. Badalov, V. Balagura, W. Baldini, R. J. Barlow, C. Barschel, S. Barsuk, W. Barter, S. Bifani, N. Farley, P. Griffith, P. Ilten, I. R. Kenyon, C. Lazzeroni, A. Mazurov, J. McCarthy, C. J. Parkinson, L. Pescatore, D. Popov, N. K. Watson

^*Corresponding author for this work

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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Abstract

Resonant structures in B⁰ → ψ′π⁻K⁺ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb^-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 the ψ′π⁻ mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1⁺.

Original language	English
Article number	222002
Number of pages	9
Journal	Physical Review Letters
Volume	112
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.112.222002
Publication status	Published - 4 Jun 2014

ASJC Scopus subject areas

Physics and Astronomy(all)

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Cite this

LHCb Collaboration, Aaij, R., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A. A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., ... Watson, N. K. (2014). Observation of the resonant character of the Z(4430)^- state. Physical Review Letters, 112(22), Article 222002. https://doi.org/10.1103/PhysRevLett.112.222002

@article{7f185bd621d34161854cf4f690b0a682,

title = "Observation of the resonant character of the Z(4430)- state",

abstract = "Resonant structures in B0 → ψ′π−K+ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb-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 the ψ′π− mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1+.",

author = "{LHCb Collaboration} and 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 {Alvarez Cartelle}, P. and Alves, {A. A.} 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 Andrews, {J. E.} and Appleby, {R. B.} and {Aquines Gutierrez}, O. and F. Archilli and A. Artamonov and M. Artuso and E. Aslanides and G. Auriemma and M. Baalouch and S. Bachmann and Back, {J. J.} and A. Badalov and V. Balagura and W. Baldini and Barlow, {R. J.} and C. Barschel and S. Barsuk and W. Barter and S. Bifani and N. Farley and P. Griffith and P. Ilten and Kenyon, {I. R.} and C. Lazzeroni and A. Mazurov and J. McCarthy and Parkinson, {C. J.} and L. Pescatore and D. Popov and Watson, {N. K.}",

year = "2014",

month = jun,

day = "4",

doi = "10.1103/PhysRevLett.112.222002",

language = "English",

volume = "112",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society (APS)",

number = "22",

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LHCb Collaboration, Aaij, R, Adeva, B, Adinolfi, M, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F, Alexander, M, Ali, S, Alkhazov, G, Alvarez Cartelle, P, Alves, AA, Amato, S, Amerio, S, Amhis, Y, An, L, Anderlini, L, Anderson, J, Andreassen, R, Andreotti, M, Andrews, JE, Appleby, RB, Aquines Gutierrez, O, Archilli, F, Artamonov, A, Artuso, M, Aslanides, E, Auriemma, G, Baalouch, M, Bachmann, S, Back, JJ, Badalov, A, Balagura, V, Baldini, W, Barlow, RJ, Barschel, C, Barsuk, S, Barter, W, Bifani, S, Farley, N, Griffith, P, Ilten, P, Kenyon, IR, Lazzeroni, C, Mazurov, A, McCarthy, J, Parkinson, CJ, Pescatore, L, Popov, D & Watson, NK 2014, 'Observation of the resonant character of the Z(4430)^- state', Physical Review Letters, vol. 112, no. 22, 222002. https://doi.org/10.1103/PhysRevLett.112.222002

TY - JOUR

T1 - Observation of the resonant character of the Z(4430)- state

AU - LHCb Collaboration

AU - Aaij, R.

AU - Adeva, B.

AU - Adinolfi, M.

AU - Affolder, A.

AU - Ajaltouni, Z.

AU - Albrecht, J.

AU - Alessio, F.

AU - Alexander, M.

AU - Ali, S.

AU - Alkhazov, G.

AU - Alvarez Cartelle, P.

AU - Alves, A. A.

AU - Amato, S.

AU - Amerio, S.

AU - Amhis, Y.

AU - An, L.

AU - Anderlini, L.

AU - Anderson, J.

AU - Andreassen, R.

AU - Andreotti, M.

AU - Andrews, J. E.

AU - Appleby, R. B.

AU - Aquines Gutierrez, O.

AU - Archilli, F.

AU - Artamonov, A.

AU - Artuso, M.

AU - Aslanides, E.

AU - Auriemma, G.

AU - Baalouch, M.

AU - Bachmann, S.

AU - Back, J. J.

AU - Badalov, A.

AU - Balagura, V.

AU - Baldini, W.

AU - Barlow, R. J.

AU - Barschel, C.

AU - Barsuk, S.

AU - Barter, W.

AU - Bifani, S.

AU - Farley, N.

AU - Griffith, P.

AU - Ilten, P.

AU - Kenyon, I. R.

AU - Lazzeroni, C.

AU - Mazurov, A.

AU - McCarthy, J.

AU - Parkinson, C. J.

AU - Pescatore, L.

AU - Popov, D.

AU - Watson, N. K.

PY - 2014/6/4

Y1 - 2014/6/4

N2 - Resonant structures in B0 → ψ′π−K+ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb-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 the ψ′π− mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1+.

AB - Resonant structures in B0 → ψ′π−K+ decays are analyzed by performing a four-dimensional fit of the decay amplitude, using pp collision data corresponding to 3fb-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 the ψ′π− mass establishes the resonant nature of this particle. The mass and width measurements are substantially improved. The spin parity is determined unambiguously to be 1+.

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U2 - 10.1103/PhysRevLett.112.222002

DO - 10.1103/PhysRevLett.112.222002

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