Quantum numbers of the X(3872) state and orbital angular momentum in its p[superscript 0]J/ψ decay
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PhysRevD.92.011102.pdf
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Author(s)
Aaij, R.
Adeva, B.
Adinolfi, M.
Affolder, A.
Ajaltouni, Z.
Akar, S.
Albrecht, J.
Alessio, F.
Alexander, M.
Ali, S.
Date Issued
July 2015
Journal
Physical Review D
Publisher
American Physical Society
Citation
Aaij, R., et al. "Quantum numbers of the X(3872) state and orbital angular momentum in its p[superscript 0]J/ψ decay." Phys. Rev. D 92, 011102 (July 2015). © 2015 CERN, for the LHCb Collaboration
Version
Final published version
Abstract
Angular correlations in B[superscript +] → X(3872)K[superscript +] decays, with X(3872) → ρ[superscript 0]J/ψ, ρ[superscript 0] → π[superscript +]π[superscript -] and J/ψ → μ[superscript +]μ[superscript -], are used to measure orbital angular momentum contributions and to determine the J[superscript PC] value of the X(3872) meson. The data correspond to an integrated luminosity of 3.0 fb[superscript -1] of proton-proton collisions collected with the LHCb detector. This determination, for the first time performed without assuming a value for the orbital angular momentum, confirms the quantum numbers to be J[superscript PC] = 1[superscript ++]. The X(3872) is found to decay predominantly through an S wave and an upper limit of 4% at 95% C.L. is set on the D-wave contribution.
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
http://dx.doi.org/10.1103/PhysRevD.92.011102
