TY - JOUR
T1 - Resummation of threshold corrections in QCD to power accuracy
T2 - The Drell-Yan cross section as a case study
AU - Beneke, M.
AU - Braun, V. M.
N1 - Funding Information:
*R esearch supported by the Department of Energy under contract DE-AC03-76SF00515
PY - 1996/12
Y1 - 1996/12
N2 - Resummation of large infrared logarithms in perturbation theory can, in certain circumstances, enhance the sensitivity to small gluon momenta and introduce spurious nonperturbative contributions. In particular, different procedures - equivalent in perturbation theory - to organize this resummation can differ by 1/Q power corrections. The question arises whether one can formulate resummation procedures that are explicitly consistent with the infrared behaviour of finite-order Feynman diagrams. We explain how this problem can be treated and resolved in Drell-Yan (lepton pair) production and briefly discuss more complicated cases, such as top quark production and event shape variables in the e+e- annihilation.
AB - Resummation of large infrared logarithms in perturbation theory can, in certain circumstances, enhance the sensitivity to small gluon momenta and introduce spurious nonperturbative contributions. In particular, different procedures - equivalent in perturbation theory - to organize this resummation can differ by 1/Q power corrections. The question arises whether one can formulate resummation procedures that are explicitly consistent with the infrared behaviour of finite-order Feynman diagrams. We explain how this problem can be treated and resolved in Drell-Yan (lepton pair) production and briefly discuss more complicated cases, such as top quark production and event shape variables in the e+e- annihilation.
UR - http://www.scopus.com/inward/record.url?scp=0030529148&partnerID=8YFLogxK
U2 - 10.1016/S0920-5632(96)90028-6
DO - 10.1016/S0920-5632(96)90028-6
M3 - Article
AN - SCOPUS:0030529148
SN - 0920-5632
VL - 51
SP - 217
EP - 224
JO - Nuclear Physics B (Proceedings Supplements)
JF - Nuclear Physics B (Proceedings Supplements)
IS - 3
ER -