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JINR PAC DUBNA 2002
Research Program
One of the most compelling
questions in modern Nuclear
Physics is what role quark
and gluon degrees of freedom
play in nuclear structure
and in the dynamic of
nuclear matter!
What is possible
contribution of
the DISK project
research program
to clarify this problem?
The goal of experiments at
DISK spectrometer is study
of cumulative particle
production.
Baldin,1971
Quark-parton
structure
function
Short-range
multinuclon
correlation
Hypothesis of “minimal
economical interactions”
V.Stavinsky, 1981
2
S m i n = ( X I PI + X II P II )
2
X = X I + X II
+ 2 пЃ§ X I XII
2
Subthreshold
High-PT and
processes
Cumulative Z-scaling
reactions
Dynamic Correlation
X Im I+ X IIm II
m + ( X Im I+ X IIm II+ m 3)
2
S m i n = ( X I PI + X II P II )
mN
P
< P N> ~
( X Im I+ X IIm II+ m III) M
R2(> 10)
P, 500 Mev/c, 90o
< P N> = 1 . 1 4 G e v / c
< пЃ‘ N> = 7 3 0
< P N> = 0 . 8 2 G e v / c
Cumulation
Correlation
< пЃ‘ N> = 3 9 0
Results
of
Experiments
in
1997-2001
JINR-Yerevan Physics Institute
Asymmetry of deuteron
photodisintegration
process by linearly
polarized photons
Experiments at AGS
(EVA/E850 Collaboration)
Color Transparency
ENERGY DEPENDENCE OF NUCLEAR TRANSPARENCY
IN C(P, 2P) SCATTERING.
Phys.Rev.Lett.87:212301,2001
Experiments at AGS
(EVA/E850 Collaboration)
N-P Short Range Correlations
from (P,2P + N) Measurements.
.
AIP Conf.Proc.549:451-454,2002,
Submitted to Phys.Rev.Lett
Backward emitted high-energy
neutrons in hard reactions of
p and p+ on carbon
Nucl-ex/00050006 28 may 2000
Detector Upgrade
Cryogenic Targets
The high effective nonmagnetic
spectrometers (10 spectrometers) based
on organic and NaI(Tl) scintillators
needed for the registration of
neutrons and photons are included in
the setup
Identification
Methods
Neutron/Photon Separation by Pulse Shape
Analysis (Detectors with Stylben Crystals)
ADC , chan
ADC1 , hcan.
TDC , chan.
ADC , chan
Charged Particle Separation by TOF-E
Analysis (Detectors with Plastic
Scintillators and NaJ(Tl) Crystals)
TDC , chan.
Neutron Spectra
Obtained with Spectrometer
Trigger System
development
Cooperation with Nuclear
Physics Institute (Czech
Republic) on the design and
manufacturing of the Silicon
Vertex Tracker.
Experimental program
at NUCLOTRON
in 2003-2005
FROM THE SUMMARY
OF THE ROUND TABLE
DISCUSSION AT VARNA
WORKSHOP’01
PHYSICAL PROBLEMS
• Strangeness in light nuclei (deuterium, helium) and K-meson
asymmetry in the cumulative region.
• Exclusive pD break-up reaction at high transverse momentum ,
spin asymmetry and color transparency.
• The structure of relativistic compound systems.
• Dynamic correlations in the cumulative production processes.
• Fragmentation of polarized deuterons into cumulative mesons.
REQUIREMENTS TO THE NUCLOTRON
2002
2003
2004
2005
Beams
Intensity Spill duration Operating time in use
p, d, dп‚­ ,
p, d, d п‚­,
p, d, d п‚­,
p, d, d п‚­,
1010-107
1011-109
1011-107
1011-107
1,0 s
5,0 s
10,0 s
10,0 s
2000 hours
2500 hours
3000 hours
3500 hours
Installation of Beam
Detectors at Beam Line
of Nuclotron
Conclusion
Our request is to
extend the project
with the first
priority for the
next 3 years and to
provide a level of
the financial
support not less
than it was in 20002002.
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