Perspectives of Antiproton and Antikaon Physics

1
Perspectives of Antiproton and Antikaon Physics
pbar
Paul Kienle Stefan Meyer Institut/ÖAW Wien and
TU München
Proc. LEAP 05 , AIP publication 2005
2
Some Selected Topics

• Antiprotons for Charm Physics
• Kaonic Nuclear Clusters Production with
  Antiproton Annihilation
• Mesons and Antiprotons in Nuclear Media
• Anti Deuteron Beams for Charm in Nuclei?
• Can we breed Anti Helium?
• Fundamental Symmetries and Antihydrogen

Case Studies Y(4260)X(3872)Z(3930)X(3940)Y(39
40)...
3
Antiprotons for Charm Physics
4
Spectroscopy of Charmonium States

• Measurement of the total width and all branching
  widths of the charmonium states
• Determination of the transition probabilities
• Deduction of the wave functions of the states
• Access to non-perturbative and thus confinement
  effects
• Needs advanced QFT treatment (Weise et al.)

Such a program was proposed by Bertold Stech
for the bottomonium system to search for
non-perturbative effects. It looks even more
promising for charmonium. Who does it ???
5
HESR
b

• Minimize circumference
• 2. Electron cooler is essentia

6
Structures to be Discovered
7
Case Study Y(4260)
8
Strategies
9
PANDA _at_ FAIR vs. ee-
10
X(3872) an Other Case?
11
X(3872) a Molecule !?
12
Z(3930) Case
13
2 3P0 Charmonium
14
Kaonic Nuclear ClustersProduction with pbar
Annihilation
15
Strangeness and Charm in Nuclei

• Discovery of strange tribaryon ppnK-, pnnK- with
  binding energies of about 200 MeV and Glt 20 MeV
• Work in progress to search for predicted high
  density of these kaonic nuclear clusters with
  lt?gt 3?(0)
• Production of kaonic nuclear clusters by
  antiproton absorption, including transfer of 2
  antikaons to produce high density matter ? kaon
  condensation ? New form of fermionic matter ???
• The creation of charmed bound nuclear matter
  Dn is a real challenge. Anti-deuteron
  annihilation ??? Subthreshold antiproton
  annihilation ???

16
Double-K-
Single-K-
Dote et al. 2002

• 3He K-ppn ?(0)0.14
  r(0)1.5
• B 20 MeV B 118 MeV

K-K-ppn r(0)3.0 B 221 MeV
17
Summary of the Search for Deeply Bound Kaonic
States
18
Exclusive Experiments-Formation and Decay
19
K-(3He,n) ppK- _at_ JPARC
20
K- Potential and ppnK- Bound State

Experimental result 4He(stopped K-, n) ppnK-
BK 173 MeV, GK 25 MeV Predicted
(Akaishi 2002) BKth 127 MeV , GK 30 MeV

• Bound nuclear state
• Small width
• High density ?3?n

21
Fast Pion Triggered Neutron Momentum Spectra with
Various Conditions Preliminary
10MeVee threshold L-arm
10MeVee threshold only
10MeVee threshold L-arm with software veto
10MeVee threshold with software veto
22
Ni-Ni Collisions _at_ 1.9A GeV (FOPI)?-d
Correlation from ppn K- (?)
N. Herrmann, Proc. EXA 05, Vienna 2005
M gt M(KEK) ? gt ?(KEK) OriginCollision effects?
23
Ni (2003) Al (2005)- ?p Correlation (ppK-)? A
Comparison
NiNi
alignment of reaction plane
alignment of L direction
AlAl
alignment of reaction plane
alignment of L direction
Minv (Lp) (GeV)
Peak position not stable! Reflection of other
resonances? Work in progress
24
?p Invariant Mass Spectrum from 3.5 GeV pC
collisions
25
?p Correlations in 3.5 GeV pC Collissions
26
Antikaons in Nuclei by Antiproton Annihilation
Production of ppK- cluster by the annihilation of
the n in 3He and creation of a K- K0 pair Missing
mass spectroscopy of K0 ?? ?- Invariant mass
of ppK- ? ? p decay Exclusive formation and
decay measurement in a 4?-detector allowing K0
and ? reconstruction
27
Double Antikaon Production in Nuclei by
Antiproton Annihilation

• The process
• The cross section
• The kinematics
• Double kaon production in nuclei
• ? With the binding energy exceeding 225 MeV,
• double kaonic nuclei can be produced
• even by stopped antiprotons.
  

28
Kaon Energy Correlation and Decay Density
Distribution for BKK0.4GeV
29
Maximum Energy and Momentum of K as Function of
the Binding Energy BKK
30
Strangeness Exchange Reaction
31
Mesons and Antiprotons in Nuclear Media
32
Mesons in Nuclear Media
A.Sibirtsev et al. Eur .Phys.J A6 (1999) 351
Hayashigaki PLB 487 (2000) 96 Morath, lee Weise
33
Subthreshold Production of D Mesons
34
Antiprotons Bound in Nuclei
I.N.Mishustin, L.M.Saturov, Th.Bürvenich,
H.Stöcker, W.Greiner, Phys.Rev, C 71, 035201
(2005) and references shown there. Exact
G-Parity Symmetry predicts very deep potential
-V-S -650 MeV However G-Parity is violated on
the mean field level Calculations using weak
G-parity, and rearrangement of nuclear structure
by the strong attraction of a real antiproton B
1 GeV !, ? 9-23 MeV, P 10-5 10-6
?HESR10-100 s-1
35
Knock-out Reaction forpbar-Nucleus Boundstates
Search
Quasi-free scatt.
Aslanides et al, Nucl. Phys. A470,445 (1987)
New experiment at a pbar storage ring with
internal target ?
36
Anti Lambda in Nuclei
37
Antideuterons
38
Antideuteron Breeder Scheme FAIR LOI by Kilian
et al.
39
Production of Antideuterons in Antiproton Rings
Proposal 1982
AIC _at_ GSI
40
Can we Breed Anti 3He and More ?

• In principle Yes using the continuation of the
  breeding process using the anti protons colliding
  with antideuterons

41
Fundamental Symmetries and Antihydrogen
42
The Holy Grail of Symmetry Tests
Y.Yamaguchi Prog. Th. Phys. 111 (2004) 545,
Riemannian QFT breaks Lorentz invariance, but
not CPT? Lorentz invariance tests are asked for!
43
Antihydrogen 1s-2s (c2-c1) Transition
44
Hyperfine Structure Test
45
Trapped Antihydrogen
Population of n-States
Temperature
Measurement indicate T 2400 K Needed for
trapping T 0.5 K
? mostly above 0.1 µm n gt 15
46
Hyperfine Structure of Antihydrogen
Accuracy of hydrogen hyperfine structure 2mHz
ImprovementSextupole race track storage
ring,like NESTOR (W.Paul and U.Trinks)
47
Sextupole Toroidal Racetrack Storage Ring for
Hyperfine Structure Studies of Antihydrogen
Equilibrium condition of antihydrogen with
magnetic moment µ on a circular orbit with radius
?s in a toroidal sextupole field with magnetic
field gradient ?B/?rl?s With the
parameters of the NESTOR storage ring, ? 0.5 m,
B3.2 T and ?B/?r 1.2 T/cm one can store
antihydrogen with v 600 m/s or equivalent to a
temperature of 21 K (!!!) which is easier to
produce than required for standard traps.
48
Sketch of a Lay out of a Sextupole Storage Ring
for Antihydrogen HFS Studies
49
(No Transcript)
50
Dibaryon ppK- ? p? Decay (FINUDA)
fit region
(detector resolution 10 MeV/c2 FWHM)
A.N.Ivanov et al, arXivnucl-th/0512037 v1
(2005) B -119 MeV ? 31 MeV ? 0.26 fm-3
Phys. Rev. Lett. 94, 212303 (2005)
51
Density distribution of K nuclear clusters
? by observing the momentum correlation in
their 3-body decay products (P. Kienle, Y.
Akaishi, T. Yamazaki Phys. Lett. B 632 (2006)
187)
K-ppn ? ? p n
3-body decay correlation techniques ? may be
also applied to study the structure of exotics
JZ / Nov. 29, 2005
52
Antiprotons in Nuclei