We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e+e- collider DAFNE. 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 (stat) +/- 3 (syst) MeV and 67 +/- 14 (stat) +/- 2 (syst) MeV, respectively.
Evidence for kaon-bound state K-pp produced in K- absorption reactions at rest
ZENONI, Aldo
2005-01-01
Abstract
We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e+e- collider DAFNE. 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 (stat) +/- 3 (syst) MeV and 67 +/- 14 (stat) +/- 2 (syst) MeV, respectively.File in questo prodotto:
| File | Dimensione | Formato | |
|---|---|---|---|
|
agnello_PRL94_2005_212303.pdf
gestori archivio
Tipologia:
Full Text
Licenza:
DRM non definito
Dimensione
211.46 kB
Formato
Adobe PDF
|
211.46 kB | Adobe PDF | Visualizza/Apri Richiedi una copia |
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
