Nucleon DIS Structure Functions in SemiInclusive ed eNX Reactions

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Nucleon DIS Structure Functions in
Semi-Inclusive ed eNX Reactions
Misak Sargsian Florida International
University 27-July-2004, Marseille
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First General Framework
Second Extracting Free Neutron DIS Structure
Functions
Loop Theorem
Third Probing HIX Structure of Nucleon
Feynman Mechanism
Minimal Fock Component Approximation
Forth Nuclear Modification of DIS Structure
Functions
Fifth Conclusion and Outlook
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First General Framework
e/ Ns X
e D
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Plane Wave Impulse Approximation
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I) Taking the pole at the on-mass shell energy
value in the Lab Frame
Virtual Nucleon (VN) Approximation
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II) Taking the pole at the on-shell p (Espsz)
value in the Light Cone Reference Frame
Light Cone (VN) Approximation
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Integrated Semi-Inclusive Cross section
in the Bjorken limit
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Second Extracting Free Neutron DIS Structure
Functions
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Plane Wave Impulse Approximation
Chew and Low, 1959, for nd
pnn
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Final State Interaction
Loop Theorem
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Third Probing HIX Structure of Nucleon
Final State Interaction of the Spectator Nucleons
is Very Sensitive to the High x Structure of
Struck Nucleon
Feynman Mechanism
Minimal Fock Component Approximation
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- First term recovers PWIA contribution
- Pole term cancels due to orthogonality
- Non-Pole (off-shell) term accounts for FSI
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Solid line - Pt0
Dashed line - Pt500 MeV/c
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Q21.8 GeV2 x0.45 WN1.7 GeV2 pt 300 MeV/c
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Forth Nuclear Modification of DIS Structure
Functions
Melnitchouk, MS, Strikman, ZPhys, 1997
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Fifth Conclusion and Outlook
- Semi-inclusive DIS Scattering from the Deuteron
provides a new framework in studies of quark
structure of nucleon
- Extraction of DIS structure function of Free
neutron
- Probing the high x structure of nucleon
- Studying the nuclear modification of DIS
structure function
- Comprehensive experimental program may be
needed
comparable with the program involving the proton
target