Abstract
The AMADEUS collaboration aims to provide unique quality results from K− hadronic interactions in light nuclear targets, in order to solve fundamental open questions in the non-perturbative strangeness QCD sector, like the controversial nature of the Λ(1405) state, the yield of hyperon formation below threshold, the yield and shape of multi-nucleon K− absorption, processes which are intimately connected to the possible existence of exotic antikaon multi-nucleon clusters and to the role of strangeness in neutron stars. AMADEUS takes advantage of the DAΦNE collider, which provides a unique source of monochromatic low-momentum kaons and exploits the KLOE detector as an active target, in order to obtain excellent acceptance and resolution data for K− nuclear capture on H, 4He, 9Be and 12C, both at-rest and in-flight.
Highlights
In the study of the low-energy QCD with u, d and s quarks the chiral perturbation theory is not applicable, due to the presence of the broad Λ(1405) state just few MeV below the K N threshold
The analyses presented here refers to the data acquired by the KLOE [3] collaboration during the 2004/2005 data taking campaign and the data collected by KLOE in collaboration with AMADEUS in the period November-December 2012
Better invariant mass and momentum resolutions are achievable with the reconstruction of the Σ+π− decay channel, which is more sensitive to the resonance shape, once the background is under control
Summary
Since the accessible invariant mass, in K−p absorption processes, is influenced by the binding energy of the proton in the hosting nucleus, our strategy is to unveil the presence of the high mass pole by exploiting K− captures in-flight [7, 8]. In this case the kinetic energy of the kaon sets the energy threshold just below the K N threshold.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
