Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1995-02-13
Phys.Rev.D52:6577-6594,1995
Physics
High Energy Physics
High Energy Physics - Phenomenology
36 pages, uses RevTeX, 7 postscript figures available upon request
Scientific paper
10.1103/PhysRevD.52.6577
We calculate production by vector and axial currents of heavy quark pairs ($c\bar{c}$, $b\bar{b}$, $t\bar{t}$) close to threshold. We take into account strong interaction contributions (including radiative corrections and leading nonperturbative effects) by using the Fermi-Watson final state interaction theorem. We use the results obtained to compare with experiment for open production of $c\bar{c}$, $b\bar{b}$ near threshold, and to give a reliable estimate of the so-called ``threshold effects'' contribution to vector and axial correlators, for $t \bar{t}$, $i.e.$, the contribution of regions close to $4 m_t^2 $ to $\Pi(t)$, for small values of $t$ ($ 0 < t \lower2pt\hbox{$\lesssim$} M_Z^2 $).
Adel Kassa
Yndurain F. J.
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