Nucleon resonances and pion-nucleon interaction in nuclear matter above the [Delta] resonance energy

Journal Article · Sun Jan 01 00:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.285· OSTI ID:6693444

Arima, M ^[1]; Masutani, K ^[2]; Seki, R ^[3]

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1. Department of Physics, Faculty of Science and Technology, Sophia University, Tokyo 102 (Japan)
2. Department of Physics, Faculty of Liberal Arts and Education, Yamanashi University, Kofu 400 (Japan)
3. Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo 188 (Japan) Department of Physics, California State University, Northridge, California 91330 (United States)

We investigate the [pi]-nucleon interaction in nuclear matter around [radical][ital s] =1.5 GeV by examining dynamical modifications of [ital N][sup *] resonances microscopically. The pion production through the [pi][Delta] channel is suppressed appreciably in nuclear matter because the pion produced is strongly distorted through a [Delta] formation with a neighboring nucleon. This effect makes the width of [ital N](1520) smaller and the mass larger in nuclear medium than in free space, and the [pi][ital N] [ital D][sub 13]-wave amplitude loses much of its inelasticity. A similar situation arises with [ital N](1535) and the [pi][ital N] [ital S][sub 11]-wave amplitude because the [eta][ital N] channel is suppressed by Pauli blocking of the nucleus that accompanies [eta]. The total widths of [ital N][sup *] in nuclear medium, however, could be larger than in free space because of their spreading potentials.

• DOE Contract Number: FG03-87ER40347
• OSTI ID: 6693444
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 51:1; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
NUCLEAR MATTER
PION-NUCLEON INTERACTIONS
DELTA BARYONS
ELASTIC SCATTERING
GEV RANGE 01-10
NUCLEONS
PION REACTIONS
RESONANCE
BARYONS
CHARGED-PARTICLE REACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
GEV RANGE
HADRON REACTIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
MATTER
MESON REACTIONS
MESON-BARYON INTERACTIONS
MESON-NUCLEON INTERACTIONS
N BARYONS
NUCLEAR REACTIONS
PARTICLE INTERACTIONS
SCATTERING
663460* - Meson- & Hyperon-induced Reactions & Scattering- (1992-)
662410 - Properties of Baryons & Baryon Resonances- (1992-)