$γγ\toπ^+π^-$ in the Modified Perturbative Approach

Details $γγ\toπ^+π^-$ in the Modified Perturbative Approach $γγ\toπ^+π^-$ in the Modified Perturbative Approach

1999-11-05

arxiv.org/abs/hep-ph/9911253v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

6 pages, 3 figures, Talk given at the XVII Autumn School, ``QCD: Perturbative or Nonperturbative'', Lisbon, Portugal, 29. Sept

Scientific paper

We investigate the transverse momentum effects in $\gamma\gamma\to\pi^+\pi^-$ at moderately large total center of mass energy $\sqrt{s}$ in the modified perturbative approach. The calculation of the differential cross section using different approximations shows that the inclusion of $k_\perp$ in the quark and gluon propagators cannot lead to a considerable improvement of the theoretical prediction.

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