Measurement of Resonant and CP Components in [bar over B][0 over s] → J/ψπ[superscript +]π[superscript −] Decays
Name
Aaij-2014-Measurement of resonant and CP.pdf
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3.88 MB
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Author(s)
Counts, Ian Thomas Hunt
Williams, Michael
Ilten, Philip J
Date Issued
May 2014
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., B. Adeva, M. Adinolfi, A. Affolder, Z. Ajaltouni, J. Albrecht, F. Alessio, et al. “Measurement of Resonant and CP Components in [bar over B][0 over s] → J/ψπ[superscript +]π[superscript −] Decays.” Phys. Rev. D 89, no. 9 (May 2014). © 2014 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
Structure of the decay [bar over B][0 over s] → J/ψπ[superscript +]π[superscript −] is studied using data corresponding to 3 fb[superscript −1] of integrated luminosity from pp collisions produced by the LHC and collected by the LHCb detector. Five interfering π[superscript +]π[superscript −] states are required to describe the decay: f[subscript 0](980), f[subscript 0](1500), f[subscript 0](1790), f[subscript 2](1270), and f[′ over 2](1525). An alternative model including these states and a nonresonant J/ψπ[superscript +]π[superscript −] component also provides a good description of the data. Based on the different transversity components measured for the spin-2 intermediate states, the final state is found to be compatible with being entirely CP odd. The CP-even part is found to be <2.3% at a 95% confidence level. The f[subscript 0](500) state is not observed, allowing a limit to be set on the absolute value of the mixing angle with the f[subscript 0](980) of <7.7∘ at a 90% confidence level, consistent with a tetraquark interpretation of the f[subscript 0](980) substructure.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.89.092006
