Transcript Slide 1

SUMMARY
Hyp 2006 - Mainz
L
SX
Ed V. Hungerford
University of Houston
[email protected]
Oct. 10-14
Hyp2006 Mainz
Summary
SUMMARY
Hyp 2006 - Mainz
I believe I have 4 tasks
1) My first task is to say
THANK YOU
Thank you speakers and conferees, especially the students
I know the dedication, years of work, and the time you
have taken to prepare your presentations. It
has been a rewarding experience for all of us.
2) My second task is to offer a perspective
With this in mind, I was pleased to see a
Daltiz Memorial Session (Gal, Davis)
Oct. 10-14
Hyp2006 Mainz
Summary
L
SX
SUMMARY
Hyp 2006 - Mainz
L
SX
HYP 03 was presented through the eyes of someone
standing on the threshold of the 4th stage of
strangeness in nuclear physics
However, my perspective is one of
“Evolution”
As our experimental and theoretical tools are sharpened, we
proceed to build structures on top of foundations previously
constructed
As illustrated in the Dalitz Memorial Lecture, much of what
we do was anticipated by our predcessors
For example, Dalitz predicted the (1405) using a Dalitz
plot in 1959.
But, we can also point to others in our field to whom we owe a legacy of ideas
Oct. 10-14
Hyp2006 Mainz
Summary
K- Nuclear bound states
(Weise, Iwasaki, Filippi, Kliene, Akaishi, Ramos, Mares)
L
SX
Of all the topics presented, this generated the most
heat, and perhaps also a little illumination
Although the idea of K- nuclear states and K condensation
is not new, the prediction by Akaishi and Yamazaki, and
subsequent claim of the production of tribaryons and
anti-kaon bound states, has recently generated much
interest.
However, the KEK observation is now attributed to an
experimental artifact, and at least part of the FINUDA
observation must be due to FSI
Yet theoretically, K-NN bound states are predicted
-The issue is the binding energy and widthOct. 10-14
Hyp2006 Mainz
Summary
K-
Oct. 10-14
Nuclear bound states
Hyp2006 Mainz
Summary
L
SX
L
Strange Structures at low Density
Hypernuclear Spectroscopy
(Gianotti, LeRose, Hashimoto)
Electromagnetic Decay of Hypernuclei
(Tamura, Millener)
Electromagnetic Moments
(Tamura, Saito, Lukstins)
Weak Decay of Hypernuclei
(Outa, Garbarino)
Kaon and Hyperon Atomic Atoms
(Hayano, Curceanu, Rutsetsky, Oller)
Oct. 10-14
Hyp2006 Mainz
Summary
SX
Hypernuclear Structure
FINUDA
L
SX
(Gianotti, Filippi)
12C(K-
- 12
stop,π ) C
Targets 12C, 7Li, 51V
Oct. 10-14
Hyp2006 Mainz
Summary
#
-B (MeV)
1
-10.94±0.06
2
-8.4±0.2
3
-5.9±0.1
4
-3.8±0.1
5
-1.6±0.2
6
0.27±0.06
7
2.1±0.2
Electromagnetic Production - Jlab
L
(LeRose, Hashimoto)
SX
Jlab Hall A
12
C (e,e’K+) 12 B
Targets 16O
Jlab Hall C
7
Oct. 10-14
Hyp2006 Mainz
Summary
Li, 28Si
L
Beam Energy Stability
SX
Value of absolute energy
is not important
---------1. Must remain stable –
Feedback lock
2. Absolute Value/angle –
Must be Calibrated
Locus Shifts as Energy
and Angles vary
Oct. 10-14
Hyp2006 Mainz
Summary
Hypernuclear γ’s
L
(Tamura, Millener)
SX
V( r ) = V0 + VsSn* SY + VtS12 + Vls(L x S+) + Vals(L x S-)
S12 is the usual spin-tensor operator
S+- = ½(Sn +-SY) are the symmetric and anti-symmetric
spin operators
Oct. 10-14
Hyp2006 Mainz
Summary
Magnetic Moments
L
(Tamura, Saito, Lukstins)
SX
Precession
ωτ = 0.74 x 10-6 |B| gauss-1
1 In RMF expect hypernuclear moments to
be near the Schmidt limits
2 Σ mixing in JN = 0 core corrections
small, but for JN = 1 moments can be
suppressed by ~10-20%
Oct. 10-14
Hyp2006 Mainz
Summary
L
Proposed Experiment at GSI
Oct. 10-14
Hyp2006 Mainz
Summary
SX
Weak Decay
L
(Outa, Garbarino)
SX
After much theoretical and experimental work
Γn/Γp seems to be resolved
Main problem was FSI but also heavy meson
exchange is required, e.g. σ
However the asymmetry is experimentally very small but
theory predicts a reasonable negative value
A consistent understanding is still lacking
Oct. 10-14
Hyp2006 Mainz
Summary
Single proton/neutron spectra from
5 He and 12 C
Λ
Λ
L
SX
Calculation by
Garbarino et al.
W()p = 1 + P α cos()
Oct. 10-14
Hyp2006 Mainz
Summary
10
L
SX
Oct. 10-14
Hyp2006 Mainz
Summary
10
L
Atomic States
(Hayano, Curceanu, Rutsetsky)
SX
Existing K-atomic He data is not consistent with Z
systematics a new measurement is close to publication
Smaller Shift ΔE <10ev
New measurement 3He
with improved resolution,
errors
Oct. 10-14
Hyp2006 Mainz
Summary
Atomic States
L
Kα Hydrogen
SX
Shift:
e1s = - 193 ± 37 (stat.) ± 6 ev
Width:
1s = 249 ± 111 (stat.) ±30ev
Oct. 10-14
Izycki et al, 1980
600
KpX
DEAR
400
200
-500
Hyp2006 Mainz
Summary
0
Bird et al, 1983
aK-p = (a0 + a1)/2
aK-n = a1
Repulsive-type
attractive
KpX (KEK)
800
M. Iwasaki et al, 1997
Davies et al, 1979
isospin dependent
antikaon-nucleon scattering lengths
1000
width 1s [eV]
SIDDHARTA
is an extension to DEAR
Kα Shift ~1 ev S/N ~1/4
Kaonic Deuterium
shift e1s [eV]
50
Oct. 10-14
Atomic States
L
Kα Deterium
SX
Hyp2006 Mainz
Summary
Elementary Reactions and Structure
(Lenske, Oiler, Hiyama, Nemura, Ahn, Schumacher, Kaiser,
Polinder,Sasaki, Nakai, Fujiwara, Rijken, Savage)
L
SX
Substantial new data, particularly polarization, and spin transfer
data from CLAS, and expect more in the future from LEPS
Λ production:
t-channel and s-channel diagrams play a large role
σL remains “small” from small to large angles, though σLT shows that it is non-zero
Together, the photo- and electro-production results favor calculations with non-zero
coupling to the D13(1895)
0
Σ production:
s-channel diagrams are most important at low energy
t-channel/Reggeon exchange dominates when W>2 GeV (above the resonance region)
σL and σLT for the Σ0 remain “small” from small to large angles
Strong resonance-like structure in the Σ0 at W=1.9 GeV.
CLAS is providing the first measurements of the interference terms and RLT for scattering
angles above 15°
’s are maximally polarized at all energies and Kaon angles when created with a 100%
polarized beam. R = 1.0; Cz ≈ Cx + 1 ; S0’s R < 1.
CLAS is providing a consistent data base of production and spin data
Oct. 10-14
Hyp2006 Mainz
Summary
Theoretical Input
L
SX
QM SUf(6) calculations were presented for NN and YN interactions
 potentials
S potentials
FSS
fss2
FSS
I=3
/2
total
I=3/2
I=1
total
total
I=1/2
I=1/2
I=0
Repulsion
Oct. 10-14
SN(I=3/2) 3S1 is strong.
Hyp2006 Mainz Shallow pocket at the surface for Ξ
Summary
Theoretical Input
L
SX
Work continues on the ESC models using OBE
SUf(3) consistent nonet interactions
Long Range ππ complete
YN, YY couplings in SUf(3)
3S (ΣN, I=3/2) repulsive weakly in ESC04 strongly in ESC06
1
N p-wave attractive on average
Lattice Calculations show promise
QCD → Lattice → EFT → Many body Calculations
Lattice QCD can be an important part of the future of
(Hyper-) Nuclear Physics
First motion toward rigorous QCD calculations (via EFT’s) of
properties and interactions of nuclei.
Oct. 10-14
Hyp2006 Mainz
Summary
Theoretical Input
L
SX
Structure calculations of light , and other  and Ξ
hypernuclei
Oct. 10-14
Hyp2006 Mainz
Summary
L
Spectroscopy of Ξ hypernuclei at J-PARC
6He
Ξ
7He
7Li
Ξ
Ξ
α +x+N+Ξ
28MeV
?
?
?
8Li
Ξ
9Li
SX
9Be
Ξ
Ξ
Ξ
10Be
RG calculations of Ξ hypernuclei
Show interesting B Ξ Structure
due to spin, isospin potential
Widths should be small ~6Mev
?
?
?
?
x
N
Ξ
=n,p,d,t,3He,α
α
Oct. 10-14
Hyp2006 Mainz
Summary
Strange Structures at High density/Temperature
multi-hyperon states
L
SX
(Senger, Schafner-Bielich, Weber)
Neutron Stars
Strange Quark Objects –
Quark Hadronization
1. Coalescence in Heavy Ion Collisions
2. Strangelets
Strange matter having approximately
equal numbers of s,u,and d quarks
interacting via QCD e.g. the H
3. Hadronic Matter
Composite of hadrons interacting by
QHD e.g. Neutron Stars
4. Quark matter
High temperature and/or high density
Oct. 10-14
Hyp2006 Mainz
Summary
High density/Temperature
L
SX
Excitation function of K+ production in A+A collisions:
 The nuclear matter equation-of-state is soft ( K  200 MeV)
Yield and elliptic flow of K+ mesons in A+A collisions:
 The in-medium potential of K+ mesons is repulsive
Yield of K- mesons proton-nucleus collisions:
 Evidence for a K-N in-medium potential of UK ≈ - 80 /0 MeV
Yield and elliptic flow of K- mesons in A+A collisions:
 Quantitative interpretation of data requires off-shell transport
calculations and in-medium spectral functions
Oct. 10-14
Hyp2006 Mainz
Summary
L
Θ+ and H dibaryon
Nuclear Density
Pentaquark Weight Diagram
SX
H Dibaryon
Required 2 hadron decay
Oct. 10-14
Hyp2006 Mainz
Summary
CL Limit for + Pentaquark
in γp → K0K+n and K0K0n
L
SX
(Hicks)
CLAS Jlab
Oct. 10-14
Hyp2006 Mainz
Summary
Limiting Cross Section
for H () production
L
SX
(Yoon)
KEK
No observation either
above (or below) 
threshold
Oct. 10-14
Hyp2006 Mainz
Summary
Systems With Multiple Strangeness can
Be Stable
L
SX
Binding Energy for systems with
at 208 Pb core with N
I and II correspond to different
parameter sets
Stability against LL = X p
Oct. 10-14
Hyp2006 Mainz
Summary
Θ+ Stability at higher densities ?
(Schaffner-Bielich)
L
SX
Σ- does not appear because
Potential is repulsive
Oct. 10-14
Hyp2006 Mainz
Summary
Oct. 10-14
New Facilities
L
(Nakamura, Feliciello, Achenbach, Nagae)
SX
Hyp2006 Mainz
Summary
New Facilities
L
(Arends,Nakamura, Feliciello, Achenbach, Nagae)
SX
FINUDA - γ’s and Hyper-fragments Thin Targets helps to identify initial transition level
Low magnetic field
New Collaboration formed – Hyper GammaHigher luminosity at DAΦNE
Low Background
Claimed rates are similar to J-PARC
Production of hyperfragments extends the possibility
of hypernuclear g-ray measurements
Oct. 10-14
Hyp2006 Mainz
Summary
New Facilities
L
(Arends, Nakamura, Feliciello, Achenbach, Nagae)
SX
_
MAMI-C
GSI – PANDA anti-proton → Ξ Ξ →
capture → hyperfragments
Upgrade to 1.5 GeV 2010
(e,e’K+)
KAOS spectrometer in the forward
direction
Work begun of the beamline
Detector R&D
γ
Detection (K-,K+), weak decay +
Ge for γ
Oct. 10-14
Hyp2006 Mainz
Summary
New Facilities
L
(Arends, Nakamura, Feliciello, Achenbach, Nagae)
SX
J-Lab
Upgrade HES
Improvement of rate
and resolution
Medium-A systems
Other experiments are under
discussion
Oct. 10-14
Hyp2006 Mainz
Summary
New Facilities
L
(Arends, Nakamura, Feliciello, Achenbach, Nagae)
SX
J-PARC
J-PARC Construction: 2001 ~
~70% completed
Beam commissioning: LINAC( Dec., 06), RCS( Sep.,
07), MR( May, 08)
Beam from MR: ~ end of 2008
Day-1 Experiments in preparation
Ξ hypernuclei
Hypernuclear gamma-ray spectroscopy
Deeply-bound Kaonic nuclei, etc.
Oct. 10-14
Hyp2006 Mainz
Summary
From the Beginning …
to the End
L
SX
Hypernuclear Physics is more than
nuclear physics revisited. It can
illuminate features that are obscured
in conventional nuclear systems. It
offers a selective probe of the
hadronic many-body problem.
Oct. 10-14
Hyp2006 Mainz
Summary
SUMMARY
Hyp 2006 - Mainz
My 3rd task is also to say THANK
YOU
This time to all the organizers, students, assistants,
the University administration at Mainz.
You have provided an excellent environment for
our conference and for enlightened discussions
My 4th task is to say
I hope to see all of you in 2009 in Japan
Oct. 10-14
Hyp2006 Mainz
Summary
L
SX