Evidence for the Decay X(3872) → ψ(2S)γ
Name
Aaij-2014-Evidence for the dec.pdf
Size
577.48 KB
Format
Adobe PDF
Checksum (MD5)
05210c91b90d61a67afcc3a831178cac
Author(s)
Counts, Ian Thomas Hunt
Williams, Michael
Ilten, Philip J
Date Issued
June 2014
Journal
Nuclear Physics B
Publisher
Elsevier
Citation
Aaij, R., et al. “Evidence for the Decay X(3872) → ψ(2S)γ.” Nuclear Physics B 886 (September 2014): 665–680. © 2014 CERN for the benefit of the LHCb Collaboration
Version
Final published version
Abstract
Evidence for the decay mode X(3872) → ψ(2S)γ in B[superscript +] → X(3872)K[superscript +] decays is found with a significance of 4.4 standard deviations. The analysis is based on a data sample of proton–proton collisions, corresponding to an integrated luminosity of 3 fb[superscript −1], collected with the LHCb detector, at centre-of-mass energies of 7 and 8 TeV. The ratio of the branching fraction of the X(3872) →ψ (2S)γ decay to that of the X(3872) → J/ψγ decay is measured to be [B(X(3872) → ψ(2S)γ) over B(X(3872)→J/ψγ)] = 2.46 ± 0.64 ± 0.29, where the first uncertainty is statistical and the second is systematic. The measured value does not support a pure D[bar over D]⁎ molecular interpretation of the X(3872) state.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1016/j.nuclphysb.2014.06.011
