Observation of a Narrow Charmoniumlike State in ExclusiveB±→K±π+π−J/ψDecays

2003/09/30 by The Belle Collaboration, S.-K. Choi, S. -K. Choi +96 · 29 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ex

paper · pdf · doi:10.1103/physrevlett.91.262001

published as Phys.Rev.Lett.91:262001,2003 · 10 pages 4 figures, submitted to Physical Review Letters

arxiv created 2003/10/31 · openalex publication_date 2003/12/23 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/04

Abstract

We report the observation of a narrow charmoniumlike state produced in the exclusive decay process B^\ifmmode±\else\textpm\fi\ensuremath→K^\ifmmode±\else\textpm\fi\ensuremathπ⁺\ensuremathπ^\ensuremath-J/\ensuremathψ. This state, which decays into \ensuremathπ⁺\ensuremathπ^\ensuremath-J/\ensuremathψ, has a mass of 3872.0\ifmmode±\else\textpm\fi0.6(stat)\ifmmode±\else\textpm\fi0.5(syst) MeV, a value that is very near the M_D⁰+M_D^*0 mass threshold. The results are based on an analysis of 152M B-B events collected at the \ensuremathΥ(4S) resonance in the Belle detector at the KEKB collider. The signal has a statistical significance that is in excess of 10\ensuremathσ.

Citations

• Charmonium: Comparison with experiment
• Observation of theηc(2S)in ExclusiveB→KKSK−π+Decays

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• Exotic nuclei with open heavy flavor mesons
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• THE X(3872) MESON AND "EXOTIC" SPECTROSCOPY AT CDF II — OR NOT? —
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• Search for theZ(4430)−atBABAR
• Exclusive initial-state-radiation production of theDD¯,D*D¯, andD*D¯*systems
• A NEW EXPERIMENT TO STUDY HYPERON CP VIOLATION AND THE CHARMONIUM SYSTEM
• Reconciling theX(3872)with the near-threshold enhancement in theD0D¯*0final state
• Super Flavour Factory Round Table – The SuperB Physics Programme
• Theoretical overview: the new mesons
• Central exclusive quarkonium production with tagged forward protons at RHIC
• Heavy quark spin symmetry and SU(3)-flavour partners of the X(3872)
• Qq Qq′ States in Chiral SU(3) Quark Model
• A note on large N scalar QCD2
• Radiative E1 decays of X(3872)
• Precision Measurement of theX(3872)Mass inJ/ψπ+π−Decays
• More loosely bound hadron molecules at CDF?
• Studying the scalar bound states ofKK¯system in Bethe-Salpeter formalism