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P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
AntikaonicMatterAtDAΦNE: Experiments withUnravelingSpectroscopy
AMADEUS
The AMADEUS ProjectP.Kienle, TU Munich and SMI Vienna
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Letter of Intent
Study of deeply bound kaonic nuclear states
at DANE 2
AMADEUS Collaboration
March 2006
111 scientists from 33 Institutes of 13 Countries signed the Letter of Intent
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Phase Diagram of Hadronic Matter
Study of the Phase Diagram at High Densities and T=0 Using Deeply Bound Kaonic Nuclear Clusters
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Λ(1405) the Doorway to Antikaonic Nuclei
Strong Antikaon-Proton attraction below the Λ(1405) resonance. Repulsion above it as shown experimentally by Re a(K-p).
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Decrease of K- Mass in a Nuclear Medium Strong Binding by Attractive K-N Force
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Antikaon Production in Ni-Ni Collisions
P. Kienle, A. Gillitzer
Proc. Int. Conf. Nucl.Phys. (1996) Wilderness,SA
Ed,:Stöcker, Gallmann, ,Hamilton, World Scientific
G,Q. Li, C.M. Ko, X.S. Fang, Phys. Lett. B329, (!994) 149
Indication of a decrease of the K- mass of ~200 MeV in a nuclear medium with n/n0 ~ 2
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Prediction of Lightest Kaonic Nuclear Systems
Strong K- binding in a nuclear medium discussed by Wycech (1986) and p-wave contribution (EXA05)
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Summary of the Search for Deeply Bound Kaonic States
All experimental data are so far Missing Mass or Invariant Mass Spectra. No exclusive MM and IM data needed for proof
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Λ-p Invariant Mass Spectra from Heavy Ion Collisions. FOPI Data
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
AMADEUS STRATEGY
• Confirm or reject the existence of kaonic nuclear clusters by an exclusive measurement using 4-detection of all reaction and decay products for construction of missing mass and invariant mass spectra.
• Use (K-stopped,N) reaction with mono-energetic K- from Φ decay produced by DAΦNE.
• Use the high performance KLOE detector implemented with a cryogenic gas target and a stopped K- trigger system
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Realization of the AMADEUS Project
• Determination of the neutron detection efficiency of the KLOE electromagnetic calorimeter
• Implementation of a cryogenic gas target and a K- stop position detection system
• Analysis of the data from K- stopped in the 4He gas of the KLOE drift chamber
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Reaction Channels (simplified)
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
KLOE – EMC
KLOE –Drift Chamber
Possible setupfor AMADEUSwithin KLOE:
Cryogenic targetInner trackerKaon trigger
6 m
AMADEUS Implemented in KLOE
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Signature for ppnK- Decay
decay: ° + p + n
p + -
4He + K- ppnK- + n
n
n
p
p
-
-
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Event Display for ppnK- Decay
ppnK-
0 + n + p p
Interaction region
Cryogenic target cell
TPC-GEM
Segmented degrader
Kaon trigger
K-stopped
p
n
p-
-
KLOE-DC
KLOE-EMC
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Determination of the KLOE CalorimeterEfficiency for Neutrons
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Monte Carlo KLOE Calorimeter
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
AMADEUS with TPC and GEM Read-out
AMADEUS Setupsecond version
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
3 ×
10-3
0 cm
2
p
rodu
ctio
n cr
oss
sect
ion
production rate for charged kaon pairsR = L b = 1500 s-1
peak
lum
inos
ity
10
33 c
m-2 s
-1
produced K± per month: 31 × 108 (80% duty cycle assumed)
40% are stopped in the cryogenic He gas target (15% liq. He density, ~ 5 cm thick) 12.5 × 108 K- 4He atoms per month
for 10-3 cluster formation yield: 12.5 × 105 kaonic clusters formed in one month
Efficiency of tracking & identification K± & detection of decay products ~ 105 events per month (~ 1000 pb-1)
0.49
bra
nchi
ng ra
tio fo
r K±
MonteCarlo Simulations for AMADEUSwith Optimized Degrader and Cryo-target
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Start Program of AMADEUS
• Reactions used: 3He(K-stopped,n)ppK-
4He(K-stopped,n/p)ppnK-/pnnK-
• Complete determination of all reaction and decay channels by detection of all charged particles, neutrons, and γ-rays
• Deduce from such exclusive data: Binding energies, total and partial widths, angular momenta, isospins, sizes, densities, etc
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Pre-experiment: Proposal to KLOE
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Detection of Reactions in 4He of Drift Chamber
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Kaon production rate: ~ 150 K- s-1 (for L ~1032 cm-2 s-1)
N = L b = 2.9 × 109
2 fb
-1 = 2
× 1
039 c
m-2
i
nteg
rate
d lu
min
osity
0.49
bra
nchi
ng ra
tio fo
r K±
Total number of produced charged kaon pairs for L = 2 fb-1
~ 0.3% stopped in the gas of the chamber
3 × 10-3 × 2.9 × 109 = 8.8 × 106 K- 4He atoms
For a cluster yield of 10-3 we have ~ 8800 clusters
With efficiency of tracking & identification of K+/-
&detection of decay products 1000-2000 reconstructed clusters
3 ×
10-3
0 cm
2
p
rodu
ctio
n cr
oss
sect
ion
AMADEUS MonteCarlo:K-clusters in existing KLOE data
P. Kienle, IX International Conference on Hypernuclear and Strange Particle Physics, 10-14 October 2006
Conclusion and Summary
The AMADEUS project plans to use a dedicated 4-detector capable of detecting all charged and neutral particles emitted in the formation and decay of kaonic nuclear clusters for a definitive clarification of their debated existence.
For the realisation of the AMADEUS set up a cryogenic target, a kaon trigger and an inner tracker must be implemented in the KLOE detector