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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

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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.

Item Type: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Library of Congress Subject Headings (LCSH): Large Hadron Collider (France and Switzerland), Beta decay, Quarks
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:
DateEvent
29 December 2015Available
8 October 2015Submitted
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
RIOXX Funder/Project Grant:
Project/Grant IDRIOXX Funder NameFunder ID
UNSPECIFIED[STFC] Science and Technology Facilities Councilhttp://dx.doi.org/10.13039/501100000271
UNSPECIFIEDRoyal Societyhttp://dx.doi.org/10.13039/501100000288
UNSPECIFIEDRoyal Commission for the Exhibition of 1851http://dx.doi.org/10.13039/501100000700

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