Electroweak one-loop contributions to top pair production in hadron colliders

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 pair production and decay at hadron colliders

“…Non-zero B 1,2 are generated by parity-violating contributions to i → ttX . Computations indicate [51,52,53] that they are small within the standard model. Next we consider the distribution of the angle ϕ between the directions of flightq 1,2 of particle/jet a 1 and a 2 , defined in the t andt rest frames, respectively.…”

One-loop QCD interconnection effects in pair production of top quarks

“…Most of these studies treat the top quarks as stable particles, which is a reasonable approximation since Γ t /m t = O(1%). For the reactions qq, gg → tt these studies comprise QCD [2] and electroweak [3] one-loop corrections, as well as the resummation of soft-gluon effects [4]. Also for the reactions e + e − , γγ → tt both the QCD [5] and electroweak [6] one-loop corrections are known.…”