Ultrasoft NLL running of the nonrelativistic O(v) QCD quark potential

Autor(en)
André H. Hoang, Maximilian Stahlhofen
Abstrakt

Using the nonrelativistic effective field theory vNRQCD, we determine the contribution to the next-to-leading logarithmic (NLL) running of the effective quark-antiquark potential at order upsilon (1/m

/k/) from diagrams with one potential and two ultrasoft loops, upsilon being the velocity of the quarks in the c. m. frame. The results are numerically important and complete the description of ultrasoft next-to-next-to-leading logarithmic (NNLL) order effects in heavy quark pair production and annihilation close to threshold.

Organisation(en)
Teilchenphysik
Journal
Journal of High Energy Physics
Band
2011
Anzahl der Seiten
27
ISSN
1029-8479
DOI
https://doi.org/10.1007/JHEP06(2011)088
Publikationsdatum
2011
Peer-reviewed
Ja
ÖFOS 2012
103036 Theoretische Physik, 103024 Quantenfeldtheorie, 103034 Teilchenphysik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/ultrasoft-nll-running-of-the-nonrelativistic-ov-qcd-quark-potential(478c7396-9900-4c83-a745-3807a2a749ac).html