Catalina Curceanu LNF-INFN October, ECT* (Trento)

K-K-K-K- p n=25 n=2 n=1 From kaonic atoms to kaonic nuclei with DA  NE November th LNF Scientific Committee C. Curceanu and J. Zmeskal DEAR/SIDDHARTA Collaboration Proposal of an international facility at DANE2

The search for antikaon‐mediated deeply bound nuclear states with AMADEUS AMADEUS collaboration 116 scientists from 14 Countries and 34 Institutes lnf.infn.it/esperimenti/siddhartaAnd LNF-07/24(IR) Report on lnf.infn.it web-page (Library) AMADEUnravelingS Antikaon Matter At DA  NE: Experiments with Unraveling Spectroscopy

Kaonic nuclei K - + 3/4 He -> n + (K - pp(n)) K - + 3/4 He -> p + (K - pn(n))

The scientific case of the so-called “deeply bound kaonic nuclear states” is hotter than ever, both in the theoretical (intensive debate) and experimental sectors. What emerges is the strong need for a complete experimental study of the scientific case, i.e. a clear and clean experiment (so without the need to make hypothesis on involved physics processes), measuring kaonic clusters both in formation and in the decay processes. AMADEUS’s main aim is to perform the first full acceptance, high precision measurement of DBKNS both in formation and in the decay processes, by implementing the KLOE detector with an inner AMADEUS-dedicated setup, containing a cryogenic target and a trigger system (and an inner tracker in a second phase), Either situations: EXISTENCE or NON- EXISTENCE of the deeply bound kaonic nuclear clusters will have strong impact in kaon-nucleon/nuclei physics!!!

Planned experiments  the future experiments in Japan at J-PARC will produce kaonic nuclear states only with K - -induced reactions in- flight (E15; E17)  alternative approaches followed at GSI with FOPI using proton-nucleus collisions at beam energies close to the strangeness production threshold and with nucleus- nucleus collisions  a dedicated facility – AMADEUS at DA  NE will study antikaon-mediated bound nuclear systems with K - induced reaction at rest

Experimental programme AMADEUS phase-1 (1) study of the (most) fundamental antikaon deeply bound nuclear systems, the kaonic dibaryon states: ppK - and (pnK - ) produced in a 3 He gas target, in formation and decay processes as next step, the kaonic 3-baryon states: ppnK - and pnnK - produced in a 4 He gas target, in formation and decay processes

Experimental programme AMADEUS phase-1 (2) Low-energy charged kaon cross sections on H, d, Helium(3 and 4), for K- momentum lower than 100 MeV/c (missing today); The K- nuclear interactions in Helium reactions (poorly known – based on one paper from 1970 …) Properties of  (1116) and charged  – for example decays in channels with neutrino -> astrophysics implications (cooling of compact stars) Resonance states as the elusive-in-nature but so important  (1405) or the  (1385) could be better understood with high statistics; their behaviour in the nuclear medium can be studied too. Excellent feasibility test – analyses of the KLOE data

AMADEUS

AMADEUS main activities KLOE data feasibility analyses (Oton Vazquez Doce) AMADEUS physics case and setup definition; MCarlo simulations R&D for AMADEUS setup: SiPM, TPC GEM, target Slow Controls and DAQ – with KLOE Neutron efficiency of KLOE Calorimeter - KLONE AMADEUS and the EU HadronPhysics2 project

Cilindrical layer of scintillating fibers surrounding the beam pipe to trigger K + K - in opposite directions Readout to be done by SiPM The AMADEUS trigger system Inner tracker (eventually, a first tracking stage before the DC) Target ( A gaseous He target for a first phase of study) Trigger (1 or 2 layers of ScFi surrounding the interaction point) target Trigger system ScFi + SiPM readout K+K+ K-K-

Installation of AMADEUS trigger test setup in DA ΦNE Trigger system tests: installation at DA Φ NE Kaon peak around ch 1600 (adc) ~ X 10 from mips as expected by simulation

AMADEUS global strategy: AMADEUS phase-1: start in 2011 (after KLOE2 step0), study di- and tri – baryon kaonic nuclei and low-energy kaon- nucleon/nuclei interactions AMADEUS phase-2 : after 2012, higher integrated luminosity, refined study of di- tri-baryon kaonic nuclei; extend to other nuclei (spectroscopy of kaonic nuclei along the periodic table…)

The luminosity request for AMADEUS Phase-1 is: 2 fb -1 of integrated luminosity with He 4 target in order to study the tribaryon DBKNS 1-2 fb -1 of integrated luminosity with He 3 target in order to study the dibaryon DBKNS 0.5 fb -1 of integrated luminosity for low-energy kaon-nuclear dedicated measurements for an overall integrated luminosity of fb -1 With the luminosity upgrade of D AF NE, the machine could deliver at least 500 pb -1 /month, which means that the overall AMADEUS Phase-1 program could be completed in about 10 months (considering installation).

AMADEUS –version 2 Tracking device: TPC-GEM or 3-4 C-GEMs Target system: cylindrical cryogenic cell in vacuum chamber Kaon trigger: Scint. fibers with SiPMs