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- W2139103039 abstract "An enhancement near the mp+MΛ mass threshold is observed in the combined pΛ¯ and p¯Λ invariant-mass spectrum from J/ψ→pK−Λ¯+c.c. decays. It can be fit with an S-wave Breit-Wigner resonance with a mass m=2075±12(stat)±5(syst) MeV and a width of Γ=90±35(stat)±9(syst) MeV; it can also be fit with a P-wave Breit-Wigner resonance. Evidence for a similar enhancement is also observed in ψ′→pK−Λ¯+c.c. decays. The analysis is based on samples of 5.8×107J/ψ and 1.4×107ψ′ decays accumulated in the BES II detector at the Beijing Electron-Positron Collider.Received 19 May 2004DOI:https://doi.org/10.1103/PhysRevLett.93.112002©2004 American Physical Society" @default.
- W2139103039 created "2016-06-24" @default.
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- W2139103039 date "2004-09-10" @default.
- W2139103039 modified "2023-10-11" @default.
- W2139103039 title "Observation of a Threshold Enhancement in the<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi>p</mml:mi><mml:mover accent=true><mml:mi>Λ</mml:mi><mml:mo stretchy=true>¯</mml:mo></mml:mover></mml:math>Invariant-Mass Spectrum" @default.
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- W2139103039 doi "https://doi.org/10.1103/physrevlett.93.112002" @default.
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