Model-independent confirmation of the Z (4430)- state

(LHCb Collaboration)

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The decay B0→ψ(2S)K+π- is analyzed using 3 fb-1 of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. The hypothesis that the ψ(2S)π mass spectrum can be described in terms of Kπ reflections alone is rejected with more than 8σ significance. This provides confirmation, in a model-independent way, of the need for an additional resonant component in the mass region of the Z(4430)- exotic state.

Original languageEnglish (US)
Article number112009
JournalPhysical Review D
Volume92
Issue number11
DOIs
StatePublished - Dec 29 2015

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mass spectra
angular distribution
interference
collisions
detectors
decay

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Model-independent confirmation of the Z (4430)- state. / (LHCb Collaboration).

In: Physical Review D, Vol. 92, No. 11, 112009, 29.12.2015.

Research output: Contribution to journalArticle

(LHCb Collaboration). / Model-independent confirmation of the Z (4430)- state. In: Physical Review D. 2015 ; Vol. 92, No. 11.
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abstract = "The decay B0→ψ(2S)K+π- is analyzed using 3 fb-1 of pp collision data collected with the LHCb detector. A model-independent description of the ψ(2S)π mass spectrum is obtained, using as input the Kπ mass spectrum and angular distribution derived directly from data, without requiring a theoretical description of resonance shapes or their interference. The hypothesis that the ψ(2S)π mass spectrum can be described in terms of Kπ reflections alone is rejected with more than 8σ significance. This provides confirmation, in a model-independent way, of the need for an additional resonant component in the mass region of the Z(4430)- exotic state.",
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