From Nucleons to Quarks
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From Nucleons to Quarks Misak Sargsian Florida International University, Miami Hadrons in the Nuclear Medium CLAS 12 2 nd European Workshop 7-11, March 2010, Paris
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Hadrons in the Nuclear Medium. From Nucleons to Quarks. Misak Sargsian Florida International University, Miami. CLAS 12 2 nd European Workshop 7-11, March 2010, Paris. High Energy Electro- Nuclear Processes . Hard – Nuclear Processes. Hadrons in the - PowerPoint PPT Presentation
Transcript of From Nucleons to Quarks
From Nucleons to Quarks
Misak SargsianFlorida International University, Miami
Hadrons in the Nuclear Medium
CLAS 12 2nd European Workshop 7-11, March 2010, Paris
High Energy Electro- Nuclear Processes
Nuclear Structure At Short Distances
Hadrons in the Nuclear Medium
I. QCD dynamics of Hadron-Hadron Interaction
IV. Protons in the Superdense Nuclear Matter
Hard – Nuclear Processes
III. SIDIS on Deuteron with Recoil Nucleons
II. Measuring the deuteron wave function
- Understanding and Learning From the Existing Data
- Narrowing the Program of the 12 GeV Studies
Mode of the Research
(*) In Collaboration with Wim Cosyn, Carlos Granados, Mike McGauley
Hard-Nuclear Processes
Mx
Hard-Hadron Processes
Brodsky, Farrar 1975Matveev, Muradyan, Takhvelidze, 1975
Gilman, Gross, 2002
Brodsky, Chertock, 1976
Hard-Rescattering Model Frankfurt, Miller, MS, Strikman PRL 2000
Mirazita, et al, Phys. Rev. C 2004
Break up of the pp from Helium 3Break up of th pn from the deuteron
Brodsky, Frankfurt, Gilman, Hiller, Miller, MS. Strikman C.Granados PLB 2006
M. S. C.GranadosPRC 2009
What is interesting in this result?
(I) Transition from 3-step to 2-step processes
(II) The Shape of the S distribution of NN Scattering
Pomerantz et al PLB09
Where we would like go from here ?
1. Generalization of break – up reactions to the deuteron break-up of other 2Baryons
3. Extension of break up reaction to virtaul photon scattering and extracting impact parameter distribution of hard scattering amplitude
2. Extraction of hard Baryonic Helicity Amplitudes from Polarized measurement
P.Hoyer, S. Kurki, ArXiV 2011
1. Generalization of break – up reactions to the deuteron break-up of other 2Baryons
M. S. C.GranadosArXiv 2010
2. Extraction of the hard NN helicity amplitudes for scattering from polarized measurements
II. Measuring Deuteron Momentum Distribution at Large Internal Momenta
Q2 = 0.33 GeV2 Q2 = 0.667GeV2
Blomqvist et al1998 Ulmer et al 2002
We study Deuteron Electrodisintegration
knock-out
M.S. PRC 2010
GEA
L.Frankfurt, M.StrikmanPRC 1997, M.S. IJMP01
L.Frankfurt, M.S. M.Strikman PRC 1997
GAGEA
K.Egiyan, et al PRL07
M.S. PRC 2010
Boeglin, Jones, Voutier, E01-020
Preliminary for PAC
Where we would like go from here ?
1. Extend the measurement to missing momenta into a GeV/c region
2. Cover full angular range of recoil nucleon momentum
(III) Semi-Inclusive DIS Scattering off the Deuteron with Recoil Nucleon
W.Cosyn, M.S.nucl-th- 2010,11
GEA approximation
Klimenko et al PRC06
Egiyan et al PRL07
Where we would like go from here ?
1. To have measurement in the extended region of Q2 and w.
2. Q2 and w dependence of will allow to map out
the hadronization process of the DIS products
3. To search for the Color Trnasparency effect in the baryonic sector
- What we learned/confirmed from SRC Studies during last 7-8 years
IV. Protons in the Superdense Nuclear matter
First: nuclear momentum distributionsin the high momentum tail is similar to that of short range
NN system/deuteron
Egiyan, et al PRC 2004
Egiyan, et al PRL 2006
Meaning of the scaling values
introduce
where
In the situation when scaling is established
Probability of finding 2N or 3N SRCs relative to deuteron and helium 3
Fraction of High momentum component of nuclear wave function due to
2N SRC
3N SRC
Isospin 1 states
Isospin 0 states
Second:
92% of the time two-nucleon high density fluctuations are proton and neutron
at most 4% of the time proton-proton or neutron-neutron
Piasetzky, MS, Frankfurt,Strikman, Watson PRL 2007
BNL data on A(p,2pn)X
JLAB data A(e,e’pn)X
R. Shneor et al. PRL 07
Combined AnalysisR.Subdei, et al Science , 2008
pn
pp
nn
Consequence of the suppression of nn and pp SRCs
M. McGauley, MS Feb. 2011arxiv 1102.3973
(1)
(2)
where
we analyze data for symmetric nuclei For
and for other A’s use the relation
(3) Neglecting contributions due to pp and nn SRCs one obtains boundary conditions
World Data on Inclusive A(e,e’)X and d(e,e’)X Data
for
we found data for
Remaining
where
using
and
Extracting data for f(y)
Al 27 y = 0.037Fe56 y = 0.0714Au197 y = 0.198He y = 0.333
Extrapolation to infinite and superdense nuclear matter
with
C.Ciofi degli Atti, E. Pace, G.Salme, PRC 1991
Asymmetric and superdense nuclear matter:
proton
proton
neutron
neutron
Some Implication of our Results
Cooling of Neutron Star:
Superfluidity of Protons in the Neutron Stars:
Protons in the Neutron Star Cores:
Isospin Locking and Large Masses of Neutron Stars
Where we would like go from here ?
1. To have more precise measurements of pp and nn SRCs
2. Measure Isospin dependence of 3N SRCs
4. Probe the onset of non-nucleonic degrees in SRCs
3. Measure nuclei with large asymmetry parameters
