TOTAL CROSS-SECTION FOR P+P-]P+P+PI-0 CLOSE TO THRESHOLD

被引：163

作者：

MEYER, HO ^{[1
]}

HOROWITZ, C ^{[1
]}

NANN, H ^{[1
]}

PANCELLA, PV ^{[1
]}

PATE, SF ^{[1
]}

POLLOCK, RE ^{[1
]}

VONPRZEWOSKI, B ^{[1
]}

RINCKEL, T ^{[1
]}

ROSS, MA ^{[1
]}

SPERISEN, F ^{[1
]}

机构：

[1] INDIANA UNIV,CYCLOTRON FACIL,BLOOMINGTON,IN 47405

来源：

NUCLEAR PHYSICS A | 1992年 / 539卷 / 04期

基金：

美国国家科学基金会;

关键词：

NUCLEAR REACTION; H-1(P; P-PI-0); E; 278.0-325.0; MEV; MEASURED SIGMA; STORAGE RING WITH ELECTRON COOLING; INTERNAL TARGET;

D O I：

10.1016/0375-9474(92)90130-C

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Making use of an electron-cooled beam in the IUCF storage ring, we have measured the total cross section sigma(tot) for pp --> pp-pi(0) at 31 bombarding energies between 285 and 325 MeV. At a level of about 5%, the data show no fluctuations that could be associated with the onset of other pion production channels. A calculation of the single-partial-wave cross section sigma(ss), including direct production only (no rescattering), falls short of the experiment by a factor of 5.2 +/- 0.3, but reproduces the observed energy dependence when scaled. This energy dependence is explained by contributions from the phase-space factor and the final-state interaction between the outgoing nucleons. The relative importance of higher partial waves is deduced from the energy dependence of sigma(tot) as well as from the angular distributions of reaction protons.

引用

页码：633 / 661

页数：29

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