Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2011-09-26
Physics
High Energy Physics
High Energy Physics - Phenomenology
24 pages,2 figures,new results added
Scientific paper
The nonperturbative mechanism of baryon-antibaryon production due to double quark pair $(q\bar q)$($q\bar q)$ generation inside a hadron is considered and the amplitude is calculated as matrix element of the vertex operator between initial and final hadron wave functions. The vertex operator is expressed solely in terms of first principle input: current quark masses, string tension $\sigma$ and $\alpha_s$. In contrast to meson-meson production via single pair generation, in baryon case a new entity appears in the vertex: the vacuum correlation length $\lambda $, which was computed before through string tension $\sigma$. As an application electroproduction of $\Lambda_c \bar\Lambda_c$ was calculated and an enhancement near 4.61 GeV was found in agreement with recent experimental data.
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