Eur. Phys. J. A (2003) 18: 313-315
https://doi.org/10.1140/epja/i2002-10224-4

Probing the deuteron structure at small N-N distances by cumulative pion production

Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia

^* e-mail: Alexei.Illarionov@jinr.ru

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-nucleonic degrees of freedom in a deuteron results in a satisfactory description of the data for the inclusive pion spectrum and improves the description of the data about T ₂₀. According to the data, T ₂₀ has very small positive values, less than 0.2, which contradicts the theoretical calculations ignoring these degrees of freedom.