Top quark production near threshold: NNLO QCD correction

被引：39
作者：
Yakovlev, O [1 ]
机构：
[1] Univ Wurzburg, Inst Theoret Phys, D-97074 Wurzburg, Germany
来源：
PHYSICS LETTERS B | 1999年 / 457卷 / 1-3期
关键词：
top quark; inclusive cross section; perturbative calculations;
D O I：
10.1016/S0370-2693(99)00507-9
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate the cross section of the process e(+)e(-)--><(tt)over bar> near threshold by resumming Coulomb-like terms with next-to-next-to-leading (NNLO) accuracy. The nonrelativistic Green function formalism and the method of "direct matching" are used. The NNLO correction turns out to be large, of the same size as the NLO correction. It changes the position and the normalization of the 1S-peak. The obtained results are compared with results existing in the literature. (C) 1999 Published by Elsevier Science B.V. All rights reserved.
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页码：170 / 176
页数：7
相关论文
共 24 条
[1]  
ACCOMANDO E, HEPPH9705442
[2]   Two-loop corrections to the leptonic decays of quarkonium [J].
Beneke, M ;
Signer, A ;
Smirnov, VA .
PHYSICAL REVIEW LETTERS, 1998, 80 (12) :2535-2538
[3]   Asymptotic expansion of Feynman integrals near threshold [J].
Beneke, M ;
Smirnov, VA .
NUCLEAR PHYSICS B, 1998, 522 (1-2) :321-344
[4]  
BENEKE M, CERNTH98120
[5]   Two-loop QCD corrections to the heavy quark pair production cross section in e+e- annihilation near threshold [J].
Czarnecki, A ;
Melnikov, K .
PHYSICAL REVIEW LETTERS, 1998, 80 (12) :2531-2534
[6]  
FADIN VS, 1987, JETP LETT+, V46, P525
[7]   HOW SUPPRESSED ARE THE RADIATIVE INTERFERENCE EFFECTS IN HEAVY UNSTABLE PARTICLE-PRODUCTION [J].
FADIN, VS ;
KHOZE, VA ;
MARTIN, AD .
PHYSICS LETTERS B, 1994, 320 (1-2) :141-144
[8]   INTERFERENCE RADIATIVE PHENOMENA IN THE PRODUCTION OF HEAVY UNSTABLE PARTICLES [J].
FADIN, VS ;
KHOZE, VA ;
MARTIN, AD .
PHYSICAL REVIEW D, 1994, 49 (05) :2247-2256
[9]   QUARK-ANTIQUARK POTENTIAL IN QCD [J].
FISCHLER, W .
NUCLEAR PHYSICS B, 1977, 129 (01) :157-174
[10]   QUARK-QUARK AND QUARK-ANTIQUARK POTENTIALS [J].
GUPTA, SN ;
RADFORD, SF .
PHYSICAL REVIEW D, 1981, 24 (08) :2309-2323
123