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

Abstract

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.

7 pages, 3 figures, LaTeX, version as accepted by Physical Review Letters

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• Observation of the Narrow State $X(3872)\to J/\psi {\pi }^{+}{\pi }^{-}$ in $\bar{p}p$ Collisions at $\sqrt{s}=1.96 \TeV$
• Isospin breaking of the narrow charmonium state of Belle at 3872 MeV as a deuson
• The D*0 D0bar threshold resonance
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• b decays: a factory for hidden charm multiquark states
• Dynamical study of the possible molecular state X(3872) with the s-channel one gluon exchange interaction
• Exploring S-Wave Threshold Effects in QCD: A Heavy-Light Approach
• Heavy-meson chiral Lagrangians, effective flavored couplings, SU(4) flavor breaking and their consequences
• Tetraquark and Pentaquark Systems in Lattice QCD
• Exotic c c-bar Mesons
• Schottky Anomaly and Hadronic Spectrum
• New charmonium-like states
• A New Experiment to Study Hyperon CP Violation and the Charmonium System
• Superradiance and subradiance in the electromagnetic radiative decay of X(3872)
• Recent results from the KEDR Detector
• The $X(3872)\to J/\psi \pi \gamma$ and $X(3872)\to J/\psi \pi \pi \gamma$ decays
• Correction to the energy spectrum of ${}^1{S}_0$ heavy quarkonia due to two-gluon annihilation effect
• Production of hidden-heavy and double-heavy hadronic molecules at the $Z$ factory of CEPC
• Hybrid meson decay from lattice QCD
• The effects of charmonium on the properties of the $1^{++}$ hidden charm poles in effective field theory
• Hidden and open charm at Belle (and elsewhere)
• Charm and Charmonium Spectroscopy
• Heavy mesons in the Quark Model
• S-wave bottom tetraquarks
• Spectroscopy of Heavy Quarkonia
• f(2010) in Lattice QCD
• Determination of the Quark Content of Scalar Mesons Using Hydrodynamical Flow in Heavy Ion Collisions
• Search for the $e^{+}{e}^{-}\to \varphi {\chi }_{c1}(3872)$ process at BESIII
• Studies with Onia at LHCb
• Electromagnetic probes revealing the inner structure of the ${\Lambda }_c(2940)$
• Threshold effects in heavy quarkonium spectroscopy
• Insights into the nature of the $X(3872)$ through B meson decays
• Observation of the first iso-spin Charmonium-like State $Z_c(4020)$ }
• Summary of Experimental Meson Physics
• X, Y, Z Search at Belle II
• Production of exotic hadrons at hadron colliders
• Search for the decays $X(3872)\to K_S^0{K}^{\pm }{\pi }^{\mp }$ and $K^{\ast }(892)\bar{K}$ at BESIII
• X, Y and Z States
• Observation of the decay ${\chi }_{c1}(3872)\to J/\psi {\mu }^{+}{\mu }^{-}$
• Mass-Spectroscopy of [$bb][\bar{b}\bar{b}$] and [$bq][\bar{b}\bar{q}$] tetraquark states in a diquark-antidiquark formalism
• Exotic Quarkonium Spectroscopy: X(3872), Z_b(10610), and Z_b(10650) in Non-Relativistic Effective Theory
• On the origin of the narrow peak and the isospin symmetry breaking of the $X$(3872)