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Observation and Properties of the X(3872) Decaying to J/psi pi+ pi- in p-p(bar) Collisions at sqrt(s) = 1.96 TeV

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arxiv hep-ex/0405004 v2 pith:FHATAVF3 submitted 2004-05-04 hep-ex hep-ph

D0 Collaboration: V.M. Abazov , et al This is my paper · ORCID
classification hep-exhep-ph
keywords collisionsdecayingobservationsqrtstateapproximatelycandidateschannel
verification ladder T0 review T1 audit T2 compute T3 formal
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We report the observation of the X(3872) in the J/psi pi+pi- channel, with J/psi decaying to mu+mu- in p-p(bar) collisions at sqrt(s) = 1.96 TeV. Using approximately 230 pb^-1 of data collected with the Run II D0 detector, we observe 522 +/- 100 X(3872) candidates. The mass difference between the X(3872) state and the J/psi is measured to be 774.9 +/- 3.1 (stat.) +/- 3.0 (syst.) MeV/c^2. We have investigated the production and decay characteristics of the X(3872), and find them to be similar to those of the psi(2S) state.

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Cited by 7 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Observation of the decay $\chi_{c1}(3872)\rightarrow J\mskip -3mu/\mskip -2mu\psi \mu^+\mu^-$

    hep-ex 2026-01 accept novelty 7.0 of 10

    First observation of χ_c1(3872) → J/ψ μ⁺μ⁻ reported at 6.5σ significance with branching fraction ratio (1.68 ± 0.37) × 10^{-3} relative to the π⁺π⁻ mode.

  2. Hidden-Charm Tetraquarks in a Mixture Model: Coupled-Channel Analysis with $c\bar{c}$ and Hadronic Molecular Components

    hep-ph 2025-05 conditional novelty 5.0 of 10

    A coupled-channel mixture model fitted to the X(3872) and Z(3930) masses predicts the X(3860) at about 3867 MeV, dominated by the charmonium core.

  3. Effect of a repulsive three-body interaction on the $DD^{(*)}K$ molecule

    nucl-th 2025-02 conditional novelty 5.0 of 10

    Repulsive three-body interactions gradually expand DD(∗)K molecules and eventually dissociate them into a D(∗)K bound pair plus a distant D meson.

  4. Heavy hadronic molecules with pion exchange and quark core couplings: a guide for practitioners

    hep-ph 2019-08 conditional novelty 5.0 of 10

    X(3872) is best described as a shallow D D* molecule in which one-pion exchange and a small charmonium core provide comparable attraction.

  5. Probing the structure of $\chi_{c1}(3872)$: Heavy quark symmetries at work

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Heavy-quark large-mass limit applied to E1 transitions of χ_c1(2P) yields decay rates that match LHCb measurements for χ_c1(3872) under the 2P assignment.

  6. The charming case of $X(3872)$ and $\chi_{c1}(2P)$

    hep-ph 2025-01 conditional novelty 4.0 of 10

    The radiative decay ratio R(X(3872)) = B(X(3872) to psi(2S) gamma)/B(X(3872) to J/psi gamma) is predicted to be 1.7 ± 0.3, matching the LHCb value 1.67, supporting the chi_c1(2P) charmonium assignment.

  7. Production of exotic hadrons in $pp$ and nuclear collisions

    hep-ph 2024-11 conditional novelty 1.0 of 10

    A review of exotic-hadron production in pp, pbar-p, and nuclear collisions, arguing that such measurements can discriminate between hadronic-molecule and compact-tetraquark interpretations of states like the X(3872).

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