Archivio Istituzionale della RicercaWe have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e(+)e(-) collider DA Phi NE. 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(-5)(+6)(stat)(-4)(+3)(syst) MeV and 67(-11)(+14)(stat)(-3)(+2)(syst) MeV, respectively.
Evidence for a kaon-bound state K(-) pp produced in K(-) absorption reactions at rest / Agnello, M., G., B., L., B., M., B., S., B., E., B., T., B., L., B., D., C., P., C., P., C., B., D., F., D.M., G., D., D., D.S., F. L., F., D., F., A., F., A., F., V., F., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - STAMPA. - 94:21(2005), pp. 212-303. [10.1103/PhysRevLett.94.212303]
Evidence for a kaon-bound state K(-) pp produced in K(-) absorption reactions at rest
AGNELLO, MICHELANGELO;
2005
Abstract
We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e(+)e(-) collider DA Phi NE. 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(-5)(+6)(stat)(-4)(+3)(syst) MeV and 67(-11)(+14)(stat)(-3)(+2)(syst) MeV, respectively.
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https://hdl.handle.net/11583/1795825
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