On the P-Wave Contributions to the Cross Sections of $t\bar{t}$ and $\t\bar{\t}$ Near Threshold

Details On the P-Wave Contributions to the Cross Sections of $t\bar{t}$ and $\t\bar{\t}$ Near Threshold On the P-Wave Contributions to the Cross Sections of $t\bar{t}$ and $\t\bar{\t}$ Near Threshold

1995-09-20

arxiv.org/abs/hep-ph/9509342v1

Nucl.Phys. B475 (1996) 507-521

Physics

High Energy Physics

High Energy Physics - Phenomenology

23 pages, LaTeX, 9 uuencoded figures

Scientific paper

10.1016/0550-3213(96)82468-0

The approach used for the determination of S-wave amplitudes containing the application of the nonrelativistic approximation in the case of P-waves leads to unphysical divergencies. We show how to avoid the latter in calculations of contributions to the cross section near threshold in agreement with field theory. This enables us to give quantitatively reliable predictions for the forward-backward asymmetry and for the axial contribution to the total cross section for the top-antitop system. Also the cross section for the production of stop-antistop near threshold is determined.

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