EXPERIMENTAL TEST OF PION-NUCLEON FORWARD DISPERSION RELATIONS AT HIGH ENERGIES

被引：150
作者：
FOLEY, KJ
JONES, RS
LINDENBAUM, SJ
LOVE, WA
OZAKI, S
PLATNER, ED
QUARLES, CA
WILLEN, EH
机构：
[1] Brookhaven National Laboratory, Upton
[2] University of Minnesota, Minneapolis
[3] Texas Christian University, Fort Worth
来源：
PHYSICAL REVIEW | 1969年 / 181卷 / 05期
关键词：
D O I：
10.1103/PhysRev.181.1775
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The small-angle differential scattering cross sections of protons for pions have been measured to high precision at the Brookhaven AGS. The range of incident momenta was 8-20 GeV/c for π+, and 8-26 GeV/c for π-. The real part of the pion-nucleon forward scattering amplitude was determined by observing its interference with the known Coulomb amplitude. Combining these results with precision measurements of pion-proton total cross sections over this energy range provided a critical test of the predictions of the forward dispersion relations. The results demonstrate the validity of the dispersion relations up to at least 20 GeV/c laboratory momentum. The predictions of charge independence are also verified by comparing these experimental measurements with forward charge-exchange scattering cross sections. Furthermore, if microscopic causality is violated, this occurs at distances" less than 10-15 cm. © 1969 The American Physical Society."
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页码：1775 / +
页数：1
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