Evidence for a kaon-bound state K- pp produced in K-absorption reactions at rest

We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e(+)e(-) collider DAPhiNE. Almost monochromatic K(-)'s produced through the decay of phi(1020) mesons are used to observe K(-) absorption reactions stopped on very thin nuclear targets. Taking thi...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Physical review letters 2005-06, Vol.94 (21), p.212303.1-212303.4
Hauptverfasser:	AGNELLO, M, BEER, G, CERELLO, P, DALENA, B, DE MORI, F, D'ERASMO, G, DI SANTO, D, FABBRI, F. L, FASO, D, FELICIELLO, A, FILIPPI, A, FILIPPINI, V, BENUSSI, L, FIORE, E. M, FUJIOKA, H, GIANOTTI, P, GRION, N, LUCHERINI, V, MARCELLO, S, MARUTA, T, MIRFAKHRAI, N, MORRA, O, NAGAE, T, BERTANI, M, OLIN, A, OUTA, H, PACE, E, PALOMBA, M, PANTALEO, A, PANZARASA, A, PATICCHIO, V, PIANO, S, POMPILI, F, RUI, R, BIANCO, S, SIMONETTI, G, SO, H, TOMASSINI, S, TOYODA, A, WHEADON, R, ZENONI, A, BOTTA, E, BRESSANI, T, BUSSO, L, CALVO, D, CAMERINI, P
Format:	Artikel
Sprache:	eng
Schlagworte:	ABSORPTION BINDING ENERGY BOUND STATE Exact sciences and technology HYPERNUCLEI HYPERONS KAONS MINUS MASS DISTRIBUTION PARTICLE DECAY PHI-1020 MESONS Physics PHYSICS OF ELEMENTARY PARTICLES AND FIELDS PROTON-PROTON INTERACTIONS PROTONS RESONANCE SPECTROMETERS TWO-BODY PROBLEM
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e(+)e(-) collider DAPhiNE. Almost monochromatic K(-)'s produced through the decay of phi(1020) mesons are used to observe K(-) absorption reactions stopped on very thin nuclear targets. Taking this unique advantage, we have succeeded to detect a kaon-bound state K(-)pp through its two-body decay into a Lambda hyperon and a proton. The binding energy and the decay width are determined from the invariant-mass distribution as 115(+6)(-5)(stat)(+3)(-4)(syst) MeV and 67(+14)(-11)(stat)(+2)(-3)(syst) MeV, respectively.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.94.212303