Double Bubble Corrections to Heavy Quark Production
نویسندگان
چکیده
Second order O( 2 s ) corrections to the heavy quark production cross-section due to massless quarks and coloured scalars are calculated for all energies above threshold. Based on the method introduced in this letter also the gauge non-invariant second order corrections due to the pure gluonic selfenergy insertion and a certain class of O( 3 s ) and O( 4 s ) corrections are determined. For the special choice of the gauge parameter, = 4, the leading threshold and high energy behaviour of the pure second order gluonic corrections to the cross-section are governed by the gluonic self energy insertion.
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