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