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Perspectives of Antiproton and Antikaon Physics. pbar. Paul Kienle Stefan Meyer Institut/ÖAW Wien and TU München. Proc. LEAP 05 , AIP publication 2005. Some Selected Topics. Antiprotons for Charm Physics Kaonic Nuclear Clusters – Production with Antiproton Annihilation

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Perspectives of antiproton and antikaon physics

Perspectives of Antiproton and Antikaon Physics


Paul Kienle

Stefan Meyer Institut/ÖAW Wien

and TU München

Proc. LEAP 05 , AIP publication 2005

Some selected topics
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(3940)...

Spectroscopy of charmonium states
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 ???



  • Minimize circumference

  • 2. Electron cooler is essentia

2 3 p 0 charmonium
2 3P0 Charmonium

Kaonic nuclear clusters production with pbar annihilation
Kaonic Nuclear ClustersProduction with pbar Annihilation

Strangeness and charm in nuclei
Strangeness and Charm in Nuclei

  • Discovery of strange tribaryon: ppnK-, pnnK- with binding energies of about 200 MeV and Γ< 20 MeV

  • Work in progress to search for predicted high density of these kaonic nuclear clusters with <ρ>~ 3ρ(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 {D+n} is a real challenge. Anti-deuteron annihilation ??? Subthreshold antiproton annihilation ???

3 he k ppn 0 0 14 r 0 1 5 b 20 mev b 118 mev



Dote et al. 2002

3He K-ppn (0)=0.14 r(0)~1.5

B = 20 MeV B ~118 MeV



B ~221 MeV

K 3 he n ppk @ jparc
K-(3He,n) ppK- @ JPARC

K potential and ppnk bound state
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

Fast pion triggered neutron momentum spectra with v arious conditions preliminary
Fast Pion Triggered Neutron MomentumSpectrawith Various Conditions Preliminary

10MeVee threshold L-arm

10MeVee threshold only

10MeVee threshold with software veto

10MeVee threshold L-arm with software veto

Ni ni collisions @ 1 9a gev fopi d correlation from ppn k
Ni-Ni Collisions @ 1.9A GeV (FOPI)Λ-d Correlation from ppn K- (?)

N. Herrmann, Proc. EXA 05, Vienna 2005

M > M(KEK)

 > (KEK)

Origin:Collision effects?

Ni 2003 al 2005 p correlation ppk a c omparison
Ni (2003) – Al (2005)- Λp Correlation (ppK-)? A Comparison


alignment of reaction plane

alignment of L direction


alignment of reaction plane

alignment of L direction

Minv (L+p) (GeV)

Peak position not stable!

Reflection of other resonances?

Work in progress …

P invariant mass spectrum from 3 5 gev pc collisions
Λp Invariant Mass Spectrum from 3.5 GeV pC collisions

P correlations in 3 5 gev pc collissions
p Correlations in 3.5 GeV pC Collissions

Antikaons in nuclei by antiproton annihilation
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- Λ + p decay

Exclusive formation and decay measurement in a 4-detector allowing K0 and Λ reconstruction

Double antikaon production in nuclei by antiproton annihilation
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.

Maximum energy and momentum of k as function of the binding energy b kk
Maximum Energy and Momentum of K+ as Function of the Binding Energy BKK

Mesons in nuclear media
Mesons in Nuclear Media

A.Sibirtsev et al. Eur .Phys.J A6 (1999) 351

Hayashigaki PLB 487 (2000) 96

Morath, lee Weise

Antiprotons bound in nuclei
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HESR:10-100 s-1

Knock out reaction for pbar nucleus boundstates search
Knock-out Reaction forpbar-Nucleus Boundstates Search

Quasi-free scatt.

Aslanides et al, Nucl. Phys. A470,445 (1987)

New experiment

at a pbarstorage ring

with internal target ?

Antideuteron breeder scheme fair loi by kilian et al
Antideuteron Breeder Scheme FAIR LOI by Kilian et al.

Production of antideuterons in antiproton rings
Production of Antideuterons in Antiproton Rings

Proposal 1982


Can we breed anti 3 he and more

Can we Breed Anti 3He and More ?

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

The holy grail of symmetry tests
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!

Antihydrogen 1s 2s c 2 c 1 transition
Antihydrogen 1s-2s (c2-c1) Transition

Trapped antihydrogen
Trapped Antihydrogen

Population of n-States


Measurement indicate

T ~ 2400 K

Needed for trapping

T ~ 0.5 K

ρ mostly above 0.1 µm

n > 15

Hyperfine structure of antihydrogen
Hyperfine Structure of Antihydrogen

Accuracy of hydrogen hyperfine structure: 2mHz

Improvement:Sextupole race track storage ring,like

NESTOR (W.Paul and U.Trinks)

Sextupole toroidal racetrack storage ring for hyperfine structure studies of antihydrogen
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 ρs in a toroidal sextupole field with magnetic field gradient ∂B/∂rlρs:

With the parameters of the NESTOR storage ring, ρ= 0.5 m, B=3.2 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.

Dibaryon ppk p decay finuda
Dibaryon ppK Antihydrogen HFS Studies- p Decay (FINUDA)

fit region

(detector resolution : 10 MeV/c2 FWHM)

A.N.Ivanov et al, arXiv:nucl-th/0512037 v1 (2005)

B= -119 MeV; = 31 MeV; ~ 0.26 fm-3

[Phys. Rev. Lett. 94, 212303 (2005)]

Density distribution of K nuclear clusters Antihydrogen HFS Studies

 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

Antiprotons in nuclei
Antiprotons in Nuclei Antihydrogen HFS Studies