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First exclusive measurements of the K  −  pp state populated in the ppK  +  Λp reaction at 2.85 GeV

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Abstract

We have analyzed data of the DISTO experiment on the exclusive ppK  +  Λp process at T p  = 2.85 GeV to search for a K  −  pp  ( ≡ X) nuclear bound state to be formed in the ppK  +  + X reaction. The deviation spectra of the K  +  missing-mass ΔM (K  + ) and Λp invariant-mass Mp) with selection of large-angle proton emission revealed a structure with M X  = 2265 ±2 MeV/c 2 and Γ X  = 118 ±8 MeV.

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Yamazaki, T., Kienle, P., Suzuki, K. et al. First exclusive measurements of the K  −  pp state populated in the ppK  +  Λp reaction at 2.85 GeV. Hyperfine Interact 193, 181–187 (2009). https://doi.org/10.1007/s10751-009-9997-5

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  • DOI: https://doi.org/10.1007/s10751-009-9997-5

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