Beams of Highly Charged Ions at the Dubna Syncrophasotron

Quark degrees of freedom in the production of soft pion jets

“…From this relation, it follows that, within the approach in question, the interval of 10 −2 ≤ b k ∼ 1 corresponds to the transition from the dominance of baryonmeson degrees of freedom to the manifestation of the internal structure of primary particles and, accordingly, quark-gluon degrees of freedom in processes involving the production of jets of secondary particles. This complies with the conclusion drawn in [6]. The temperature defined as the mean kinetic energy of particles in the jet rest frame, T k , is estimated * E-mail: VAOkorokov@mephi.ru;Okorokov@bnl.gov on the basis of the functions F (b k ) that, for pion jets, have the form [3] …”

“…; and X bnd = 0.1−0.2. The square of the distance from the kth particle to the beam axis V in the space of U k is defined as [1,6]. A relation between b k and α S , which is the renormalized strong-coupling constant, was obtained in [5].…”

“…, and which characterize the invariant cross section [6]. In [7], it was proposed to study the geometric properties of jets in the U k space with the aid of the cluster dimension D defined on the basis of the relation between the number of particles in the jet being considered, N (b k ), and its radius:…”

Multiquark cluster model at large Bjorken scaling variable

“…The region X > 1 was investigated earlier in the processes of cumulative particle production in hadronnucleus collisions. The possibility of deriving information about the quark parton structure functions of nuclei from the data on a cumulative pion production was noted in [30], and in [31] the similarity in the X-behaviour of the ratio of cumulative pion production cross sections on different nuclei and the ratio of the deep inelastic structure functions of the same nuclei was pointed out.…”