Polarization Phenomena in Fragmentation of Deuterons to Pions and Non-Nucleon Degrees of Freedom in the Deuteron

Abstract

The fragmentation of deuterons into pions emitted forward in the kinematic region forbidden for free nucleon-nucleon collisions is analyzed. It is shown that the inclusion of the non-nucleon degrees of freedom in a deuteron allows to describe the experimental data about inclusive pion spectrum rather satisfactory and improves the description of data concerning the deuteron analyzing power T_{20}. The experimental data show the positive sign and very small values, less than 0.2, of T_{20} what can't be reproduced by the calculations ignoring these degrees of freedom.

Comments: 3 pages, 2 figures, uses epsfig.sty and wrapfig.sty, Talk given at 9th International Workshop on High-Energy Spin Physics (SPIN 01), Dubna, Russia, 2-7 Aug 2001 minor revisions in the text, reference added