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, Michelangelo; G., Beer; L., Benussi; M., Bertani; S., Bianco; E., Botta; T., Bressani; L., Busso; D., Calvo; P., Camerini; P., Cerello; B., Dalena; F., DE MORI; G., D'Erasmo; D., DI SANTO; F. L., Fabbri; D., Faso; A., Feliciello; A., Filippi; V., Filippini; E. M., Fiore; H., Fujioka; P., Gianotti; N., Grion; V., Lucherini; S., Marcello; T., Maruta; N., Mirfakhrai; O., Morra; T., Nagae; A., Olin; H., Outa; E., Pace; M., Palomba; A., Pantaleo; A., Panzarasa; V., Paticchio; S., Piano; F., Pompili; R., Rui; G., Simonetti; H., So; S., Tomassini; A., Toyoda; R., Wheadon; A., Zenoni. - 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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