You need JavaScript to view this

Pion-nucleon interaction in nuclear matter above the {Delta} resonance energy

Technical Report:

Abstract

We investigate the {pi}-nucleus interaction for 600 - 900 MeV/c by microscopically examining dynamical modifications of N{sup *} resonances in nuclear matter. The pion production through the {pi}{Delta} channel is appreciably suppressed in nuclei because the pion produced suffers strong distortion by a {Delta} formation with a neighboring nucleon. This effect makes the width of N(1520) smaller and the mass larger in nuclei than in free space, and the {pi}N D{sub 13}-wave amplitude loses much of its inelasticity in nuclei. A similar situation arises with N(1535) and the {pi}N S{sub 11}-wave amplitude because the {eta}N channel is suppressed by Pauli blocking on the nucleon accompanying {eta}. These effects, however, change the {pi}-nucleus elastic-scattering cross sections by only a small amount because of Fermi averaging. They may appear significantly in some inelastic reactions. Spreading potential makes the width of N{sup *} larger and counteracts the pion-production suppression, but it cannot explain the puzzling disagreement between the data and the calculations. (author).
Authors:
Arima, Masaki; [1]  Masutani, Keiichi; Seki, Ryoichi
  1. Jochi Univ., Tokyo (Japan). Faculty of Science and Technology
Publication Date:
Apr 01, 1993
Product Type:
Technical Report
Report Number:
INS-971
Reference Number:
SCA: 662340; PA: JPN-93:011042; EDB-94:015776; ERA-19:005657; NTS-94:014105; SN: 93001119257
Resource Relation:
Other Information: PBD: Apr 1993
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; PION-NUCLEON INTERACTIONS; NUCLEAR MATTER; PION CONDENSATION; RESONANCE; FERMI GAS; ELASTIC SCATTERING; CROSS SECTIONS; NUCLEAR MODELS; 662340; HADRON INTERACTIONS
OSTI ID:
10110008
Research Organizations:
Tokyo Univ., Tanashi (Japan). Inst. for Nuclear Study
Country of Origin:
Japan
Language:
English
Other Identifying Numbers:
Other: ON: DE94727455; TRN: JP9311042
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
40 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Arima, Masaki, Masutani, Keiichi, and Seki, Ryoichi. Pion-nucleon interaction in nuclear matter above the {Delta} resonance energy. Japan: N. p., 1993. Web.
Arima, Masaki, Masutani, Keiichi, & Seki, Ryoichi. Pion-nucleon interaction in nuclear matter above the {Delta} resonance energy. Japan.
Arima, Masaki, Masutani, Keiichi, and Seki, Ryoichi. 1993. "Pion-nucleon interaction in nuclear matter above the {Delta} resonance energy." Japan.
@misc{etde_10110008,
title = {Pion-nucleon interaction in nuclear matter above the {Delta} resonance energy}
author = {Arima, Masaki, Masutani, Keiichi, and Seki, Ryoichi}
abstractNote = {We investigate the {pi}-nucleus interaction for 600 - 900 MeV/c by microscopically examining dynamical modifications of N{sup *} resonances in nuclear matter. The pion production through the {pi}{Delta} channel is appreciably suppressed in nuclei because the pion produced suffers strong distortion by a {Delta} formation with a neighboring nucleon. This effect makes the width of N(1520) smaller and the mass larger in nuclei than in free space, and the {pi}N D{sub 13}-wave amplitude loses much of its inelasticity in nuclei. A similar situation arises with N(1535) and the {pi}N S{sub 11}-wave amplitude because the {eta}N channel is suppressed by Pauli blocking on the nucleon accompanying {eta}. These effects, however, change the {pi}-nucleus elastic-scattering cross sections by only a small amount because of Fermi averaging. They may appear significantly in some inelastic reactions. Spreading potential makes the width of N{sup *} larger and counteracts the pion-production suppression, but it cannot explain the puzzling disagreement between the data and the calculations. (author).}
place = {Japan}
year = {1993}
month = {Apr}
}