Probing nuclei with weakly interacting hadrons

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5172543

Meson-nucleus scattering is reviewed within the framework of the Watson multiple-scattering expansion and with an emphasis upon blocking and binding-energy effects. An application is made to K/sup +/-nucleus elastic and charge-exchange scattering. A discrepancy is found between the conventional theory and experimental data for the total cross-section ratio K/sup +/-carbon/K/sup +/-deuteron. It is shown that an enlargement of the nucleon in the nucleus over its size in free space can explain the discrepancy. This assumption is consistent with several models of the K/sup +/-N interaction and is not in disagreement with available K/sup +/-nucleus elastic and inelastic scattering data. Pion-nucleon single charge exchange in the energy region 30 MeV < T/sub ..pi../ < 70 MeV, where the forward differential cross section has a deep minimum, is also analyzed. A system of coupled channels with nonlocal potentials is formulated which includes the isospin breaking effects of the Coulomb interaction, pion and nucleon mass differences, and the photoabsorption channel. A comparison with data is made, phase shifts are deduced, and a value for the odd scattering length a/sub 1/-a/sub 3/ = .290 +/- .008 ..mu../sup -1/ is extracted. Finally, pion-nucleus single charge exchange from various nuclei in the same energy region is analyzed. It is shown that blocking effects place the minimum of the forward differential cross section at the correct experimental energy. Further physical effects are included in order to obtain agreement with the experimental value at the minimum.

• Research Organization: Arizona State Univ., Tempe (USA)
• OSTI ID: 5172543
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BASIC INTERACTIONS
CARBON
CHARGE-EXCHANGE INTERACTIONS
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
COUPLED CHANNEL THEORY
CROSS SECTIONS
DATA
DEUTERIUM
ELASTIC SCATTERING
ELEMENTS
ENERGY RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HYDROGEN ISOTOPES
INFORMATION
INTERACTIONS
ISOSPIN
ISOTOPES
KAON PLUS REACTIONS
KAON REACTIONS
LIGHT NUCLEI
MASS DIFFERENCE
MESON REACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
MULTIPLE SCATTERING
NONMETALS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PION REACTIONS
PION-NUCLEON INTERACTIONS
SCATTERING
STABLE ISOTOPES
STRONG INTERACTIONS
THEORETICAL DATA
TOTAL CROSS SECTIONS