Electroweak corrections to top-quark pair productionin quark-antiquark annihilation

Abstract

Top-quark physics plays an important rôle at hadron colliders such as the Tevatron at Fermilab or the LHC at CERN. Given the planned precision at these colliders, precise theoretical predictions are required. In this paper we present the complete electroweak corrections to QCD-induced top-quark pair production in quark-antiquark annihilation. In particular we provide compact analytic expressions for the differential partonic cross section, which will be useful for further theoretical investigations.

Two-loop leading color corrections to heavy-quark pair production in the gluon fusion channel

“…(2.3) arises from the interference of one-loop diagrams with the tree-level amplitude [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. The O(α 2 S ) term A 2 consists of two parts, the interference of two-loop diagrams with the Born amplitude and the interference of one-loop diagrams among themselves: The term A (1×1) 2 was derived in [87][88][89][90].…”

“…Most of the observables related to the top-quark pair production have been calculated up to NLO [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In several cases, the next-to-leading (NLO) corrections have been supplemented by the resummation of large logarithmic corrections at leading (LL, [25][26][27][28][29][30][31]), next-to-leading (NLL, [32][33][34][35][36][37][38]) and next-to-next-to-leading logarithmic (NNLL, [39][40][41][42][43]) accuracy.…”

Top quark charge asymmetry: searching for light axigluons in t t ¯ $$ t\overline{t} $$ + jet production at the LHC

“…At the Tevatron the charge asymmetry has been measured as a forward-backward asymmetry at the level of the top quarks [4,5] and at the level of the decay products in the semileptonic [6,7] and double leptonic decay [8,9]. While CDF found deviations from the NLO Standard Model prediction [2,3,[10][11][12][13][14][15][16][17] in particular in the region of high invariant mass of the tt pair, M tt , and at large rapidity differences, ∆y, the most recent analyses from D0 agree with the SM prediction if all analysis channels are combined. At the LHC, measurements of the top-quark charge asymmetry in semi-leptonic [18][19][20] and double-leptonic decays [21,22] agree with the SM prediction; however, the errors are still very large [23].…”

Electroweak corrections and Bloch-Nordsieck violations in 2-to-2 processes at the LHC

“…Virtual electroweak (EW) corrections have been calculated for a range of SM processes such as Z/γ+jet [1][2][3], inclusive jet production [4], top pair production [5,6], and b−jet production [7]. Previous work has generally focused on the virtual EW corrections.…”