Phys. Rev. Lett. 94, 212303 (2005) [4 pages]Evidence for a Kaon-Bound State K-pp Produced in K- Absorption Reactions at RestReceived 4 March 2005; published 3 June 2005 We have searched for a deeply bound kaonic state by using the FINUDA spectrometer installed at the e+e- collider DAΦNE. Almost monochromatic K-’s produced through the decay of ϕ(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 Λ 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. © 2005 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.94.212303
DOI:
10.1103/PhysRevLett.94.212303
PACS:
21.45.+v, 21.30.Fe, 21.80.+a, 25.80.Nv
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.