Indication of a Deeply Bound and Compact K(-) pp State Formed in the pp -> p Lambda K(+) Reaction at 2.85 GeV RID D-4627-2011

T Yamazaki, M Maggiora, P Kienle, K Suzuki, A Amoroso, M Alexeev, F Balestra, Y Bedfer, R Bertini, LC Bland, A Brenschede, F Brochard, MP Bussa, S Choi, ML Colantoni, R Dressler, M Dzemidzic, JC Faivre, L Ferrero, J ForyciarzI Frohlich, V Frolov, R Garfagnini, A Grasso, S Heinz, WW Jacobs, W Kuhn, A Maggiora, Daniele PANZIERI, HW Pfaff, G Pontecorvo, A Popov, J Ritman, P Salabura, S Sosio, V Tchalyshev, SE Vigdor

Risultato della ricerca: Contributo su rivistaArticolo in rivista

Abstract

We have analyzed data of the DISTO experiment on the exclusive pp ! p K þ reaction at 2.85 GeV to search for a strongly bound compact K pp ð X Þ state to be formed in the pp ! K þ þ X reaction. The observed spectra of the K þ missing mass and the p invariant-mass with high transverse momenta of p and K þ revealed a broad distinct peak of 26 - confidence with a mass M X ¼ 2267 3 ð stat Þ 5 ð syst Þ MeV =c 2 and a width X ¼ 118 8 ð stat Þ 10 ð syst Þ MeV . The enormously large cross section indicates formation of a compact K pp with a large binding energy of B K ¼ 103 MeV , which can be a possible gateway toward cold and dense kaonic nuclear matter.
Lingua originaleInglese
pagine (da-a)132502-1-132502-5
Numero di pagine6
RivistaPhysical Review Letters
Volume104
Numero di pubblicazione13
DOI
Stato di pubblicazionePubblicato - 1 gen 2010

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