New results on heavy quarks near threshold

M. Beneke

New results on heavy quarks near threshold

High Energy Physics - Phenomenology 2007-05-23 v2

Authors: M. Beneke

Abstract

We review in brief the threshold expansion, a method to perform the expansion of Feynman integrals near the heavy quark-antiquark threshold, and its relation to the construction of two effective theories, non-relativistic QCD (NRQCD) and potential-NRQCD. We then summarize recent next-to-next-to-leading order results on the decay $J/\Psi\to l^+ l^-$ , the bottom quark mass from $\Upsilon$ sum rules and the top-anti-top production cross section near threshold in $e^+ e^-$ collisions.

Keywords

Heavy quarks threshold expansion effective theories NRQCD potential-NRQCD

Cite

@article{arxiv.hep-ph/9806429,
  title  = {New results on heavy quarks near threshold},
  author = {M. Beneke},
  journal= {arXiv preprint arXiv:hep-ph/9806429},
  year   = {2007}
}

Comments

Talk presented at the XXXIIIrd Rencontres de Moriond `Electroweak Interactions and Unified Theories', 14-21 March 1998, Les Arcs, France; 12 pages, LaTeX, 1 figures, .sty files included, (v2): mistyped CF CA term in Eq. (12) fixed

New results on heavy quarks near threshold

Abstract

Keywords

Cite

Comments

Related papers