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Model-independent confirmation of theZ(4430)−state
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LHCb Collaboration (Including: Back, J. J., Blake, Thomas, Craik, Daniel, Dossett, D., Gershon, T. J., Kreps, Michal, Latham, Thomas, Pilar, T., Poluektov, Anton, Reid, Matthew M., Silva Coutinho, R., Wallace, Charlotte and Whitehead, M. (Mark)). (2015) Model-independent confirmation of theZ(4430)−state. Physical Review D (Particles, Fields, Gravitation and Cosmology), 92 (11). doi:10.1103/PhysRevD.92.112009
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Official URL: http://dx.doi.org/10.1103/PhysRevD.92.112009
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.
| Item Type: | Journal Article | ||||||
|---|---|---|---|---|---|---|---|
| Subjects: | Q Science > QC Physics | ||||||
| Divisions: | Faculty of Science > Physics | ||||||
| Journal or Publication Title: | Physical Review D (Particles, Fields, Gravitation and Cosmology) | ||||||
| Publisher: | American Physical Society | ||||||
| ISSN: | 1550-7998 | ||||||
| Official Date: | 29 December 2015 | ||||||
| Dates: |
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| Date of first compliant deposit: | 30 July 2019 | ||||||
| Volume: | 92 | ||||||
| Number: | 11 | ||||||
| DOI: | 10.1103/PhysRevD.92.112009 | ||||||
| Status: | Peer Reviewed | ||||||
| Publication Status: | Published | ||||||
| Access rights to Published version: | Open Access |
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