Indication of a Deeply Bound and Compact K- pp State Formed in the pp -> p Lambda K+ Reaction at 2.85 GeV
Articolo
Data di Pubblicazione:
2010
Abstract:
We have analyzed data of the DISTO experiment on the exclusive pp -> p Lambda K+ reaction at 2.85 GeV to search for a strongly bound compact K- pp(equivalent to X) state to be formed in the pp -> K+ + X reaction. The observed spectra of the K+ missing mass and the p Lambda invariant-mass with high transverse momenta of p and K+ revealed a broad distinct peak of 26-sigma confidence with a mass M-X = 2267 +/- 3(stat) +/- 5(syst) MeV/c(2) and a width Gamma(X) = 118 +/- 8(stat) +/- 10(syst) MeV. The enormously large cross section indicates formation of a compact K- pp with a large binding energy of B-K = 103 MeV, which can be a possible gateway toward cold and dense kaonic nuclear matter.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
NUCLEAR CLUSTERS; SYSTEMS
Elenco autori:
Yamazaki T;
Maggiora M;
Kienle P;
Suzuki K;
Amoroso A;
Alexeev M;
Balestra F;
Bedfer Y;
Bertini R;
Bland LC;
Brenschede A;
Brochard F;
Bussa MP;
Choi S;
Colantoni ML;
Dressler R;
Dzemidzic M;
Faivre JC;
Ferrero L;
Foryciarz J;
Frohlich I;
Frolov V;
Garfagnini R;
Grasso A;
Heinz S;
Jacobs WW;
Kuhn W;
Maggiora A;
Panzieri D;
Pfaff HW;
Pontecorvo G;
Popov A;
Ritman J;
Salabura P;
Sosio S;
Tchalyshev V;
Vigdor SE
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