Longitudinal Electroproduction of Charged Pions from Hydrogen, Deuterium, and Helium-3.

Welch, T. P. ; Jackson, H. E.

Technical Information Center Oak Ridge Tennessee

关键词: Electroproduction;    Hydrogen;    Deuterium;    Helium;    Clouds;   

RP-ID  :  DE2004825022

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Conventional pictures of nuclear interactions, in which the pion mediates the long/medium range part of the nuclear force, predict an enhancement of the virtual pion cloud in nuclei relative to that in the free nucleon. Jefferson Lab Experiment E91003 measured charged pion electroproduction from Hydrogen, Deuterium, and Helium-3. The longitudinal cross section, which in the limit of pole dominance can be viewed as the quasifree knockout of a virtual pion, was extracted via a Rosenbluth separation. The longitudinal cross sections from Deuterium and Helium-3 were compared to Hydrogen to look for signatures of the nuclear pions.