Separated Antideuteron Beam at IHEP Accelerator

Indication on the universal hadron substructure: Constituent quarks

“…Most of the models analyse experimental data in terms of x F and/or p T . To investigate the dependence of SSA on a secondary meson production angle, the measurements * Electronic address: troshin@mx.ihep.su in the reaction π − + p ↑ → π 0 + X were carried out at the PROZA-M experiment (Protvino) at 40 GeV pion beam in the two different kinematic regions: at Feinman scaling variable x F ≈ 0 [1] and in the polarized target fragmentation region [2]. The papers [2,3] reported that the asymmetry of inclusive π 0 production in the reaction π − +p ↑ → π 0 +X begins to grow up at the same centre of mass energy E cms 0 ≈ 1.7 GeV.…”

“…The dependence of the single-spin asymmetry AN on π 0 -meson center of mass energy in the reaction π − + p ↑ → π 0 +X in the polarized target fragmentation region at 40 GeV ([2]). …”