Polarization Transfer in the {sup 4}He(e-vector,e{sup '}p-vector){sup 3}H Reaction at Q{sup 2}=0.8 and 1.3 (GeV/c){sup 2}
Journal Article
·
· Physical Review Letters
- University of South Carolina, Columbia, South Carolina 29208 (United States)
- Hampton University, Hampton, Virginia 23668 (United States)
- Argonne National Laboratory, Argonne, Illinois (United States)
- The George Washington University, Washington, D.C. 20052 (United States)
- Christopher Newport University, Newport News, Virginia 23606 (United States)
- Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States)
Proton recoil polarization was measured in the quasielastic {sup 4}He(e-vector,e{sup '}p-vector){sup 3}H reaction at Q{sup 2}=0.8 and 1.3 (GeV/c){sup 2} with unprecedented precision. The polarization-transfer coefficients are found to differ from those of the {sup 1}H(e-vector,e{sup '}p-vector) reaction, contradicting a relativistic distorted-wave approximation and favoring either the inclusion of medium-modified proton form factors predicted by the quark-meson coupling model or a spin-dependent charge-exchange final-state interaction. For the first time, the polarization-transfer ratio is studied as a function of the virtuality of the proton.
- OSTI ID:
- 21470950
- Journal Information:
- Physical Review Letters, Vol. 105, Issue 7; Other Information: DOI: 10.1103/PhysRevLett.105.072001; (c) 2010 American Institute of Physics; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CHARGE EXCHANGE
COUPLING
DISTORTED WAVE THEORY
ELECTRON REACTIONS
FINAL-STATE INTERACTIONS
FORM FACTORS
GEV RANGE
HELIUM 4 TARGET
HYDROGEN 1 TARGET
POLARIZATION
PROTONS
QUARKS
QUASI-ELASTIC SCATTERING
RELATIVISTIC RANGE
SPIN
TRITIUM
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
DIMENSIONLESS NUMBERS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
HYDROGEN ISOTOPES
INTERACTIONS
ISOTOPES
LEPTON REACTIONS
LIGHT NUCLEI
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
QUASI-FREE REACTIONS
RADIOISOTOPES
SCATTERING
TARGETS
YEARS LIVING RADIOISOTOPES
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
CHARGE EXCHANGE
COUPLING
DISTORTED WAVE THEORY
ELECTRON REACTIONS
FINAL-STATE INTERACTIONS
FORM FACTORS
GEV RANGE
HELIUM 4 TARGET
HYDROGEN 1 TARGET
POLARIZATION
PROTONS
QUARKS
QUASI-ELASTIC SCATTERING
RELATIVISTIC RANGE
SPIN
TRITIUM
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CALCULATION METHODS
CHARGED-PARTICLE REACTIONS
DIMENSIONLESS NUMBERS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
HADRONS
HYDROGEN ISOTOPES
INTERACTIONS
ISOTOPES
LEPTON REACTIONS
LIGHT NUCLEI
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
QUASI-FREE REACTIONS
RADIOISOTOPES
SCATTERING
TARGETS
YEARS LIVING RADIOISOTOPES