Abstract
We have analyzed data of the DISTO experiment on the exclusive pp→pΛK+ reaction at 2.85 GeV to search for a strongly bound compact K-pp(X) state to be formed in the pp→K ++X reaction. The observed spectra of the K+ missing mass and the pΛ invariant-mass with high transverse momenta of p and K + revealed a broad distinct peak of 26-σ confidence with a mass MX=2267±3(stat)±5(syst)MeV/c2 and a width ΓX= 118±8(stat)±10(syst)MeV. The enormously large cross section indicates formation of a compact K-pp with a large binding energy of BK=103MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.
Lingua originale | Inglese |
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Numero di articolo | 132502 |
Rivista | Physical Review Letters |
Volume | 104 |
Numero di pubblicazione | 13 |
DOI | |
Stato di pubblicazione | Pubblicato - 1 apr 2010 |
Pubblicato esternamente | Sì |