NN Core Interactions and Differential Cross Sections from One Gluon Exchange

Journal Article · Fri Jan 01 04:00:00 EST 1993 · Physical Review C

OSTI ID:954374

Swanson, Eric; Kovarik, M D; Capstick, Simon; Barnes, Ted

We derive nonstrange baryon-baryon scattering amplitudes in the nonrelativistic quark model using the "quark Born diagram" formalism. This approach describes the scattering as a single interaction, here the one-gluon-exchange (OGE) spin-spin term followed by constituent interchange, with external nonrelativistic baryon wavefunctions attached to the scattering diagrams to incorporate higher-twist wavefunction effects. The short-range repulsive core in the NN interaction has previously been attributed to this spin-spin interaction in the literature; we find that these perturbative constituent-interchange diagrams do indeed predict repulsive interactions in all I,S channels of the nucleon-nucleon sytem, and we compare our results for the equivalent short-range potentials to the core potentials found by other authors using nonperturbative methods. We also apply our perturbative techniques to the NDelta and Delta Delta systems: Some Delta Delta channels are found to have attractive core

• Research Organization: Thomas Jefferson Lab National Accelerator Facility
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 954374
• Report Number(s): CEBAF-TH-93-04
• Journal Information: Physical Review C, Journal Name: Physical Review C; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
DIFFERENTIAL CROSS SECTIONS
GLUONS
J-J COUPLING
QUARK MODEL
SCATTERING
SCATTERING AMPLITUDES