Summing Logs of the Velocity in NRQCD and Top Threshold Physics

Details Summing Logs of the Velocity in NRQCD and Top Threshold Physics Summing Logs of the Velocity in NRQCD and Top Threshold Physics

2004-12-13

arxiv.org/abs/hep-ph/0412160v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, uses ws-procs9x6.cls and rotating_pr.sty, 2 ps figures. Invited talk at Continuous Advances in QCD 2004, Minneapolis

Scientific paper

To achieve reliable predictions of the top-antitop threshold cross section at a future e+e- Linear Collider logarithms of the top velocity need to be resummed. I review the issues that make this problem complicated and show how the task can be achieved by renormalization in an effective theory using the so called velocity renormalization group. The most recent NNLL order results are discussed.

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