| Literature DB >> 16090313 |
M Agnello1, 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.
Abstract
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.Entities:
Year: 2005 PMID： 16090313 DOI： 10.1103/PhysRevLett.94.212303
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161