Top quark threshold production in $γγ$ collision in the next-to-leading order

Details Top quark threshold production in $γγ$ collision in the next-to-leading order Top quark threshold production in $γγ$ collision in the next-to-leading order

1998-10-27

arxiv.org/abs/hep-ph/9810496v2

Nucl.Phys. B550 (1999) 375-396

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages Latex, misprints corrected

Scientific paper

10.1016/S0550-3213(99)00205-9

The total cross section of the top quark-antiquark pair production near threshold in $\gamma\gamma$ collision is computed analytically up to the next-to-leading order in perturbative and nonrelativistic expansion for general photon helicity. The approximation includes the first order corrections in the strong coupling constant and the heavy quark velocity to the nonrelativistic Coulomb approximation.

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