Top-quark production and QCD

Kidonakis, Nikolaos; Pecjak, Ben D.

doi:10.1140/epjc/s10052-012-2084-0

Cited by 44 publications

(57 citation statements)

References 205 publications

(383 reference statements)

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“…The analysis of these events has led, for example, to a top mass determination of M t = 173.18 ± 0.94GeV [1], corresponding to a relative error of about half percent. The total production cross section σ tt = 7.65 ± 0.42 pb [2] determined at Tevatron is in very good agreement with the theory predictions [3][4][5][6][7][8][9][10][11][12][13][14]. The same is true for the cross section measurements performed at the LHC [15][16][17][18][19][20][21].…”

Section: Introductionsupporting

confidence: 74%

Weak interactions in top-quark pair production at hadron colliders: An Update

Kühn¹,

Uwer²

2016

Proceedings of 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for

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Weak corrections for top-quark pair production at hadron colliders are revisited. Predictions for collider energies of 8 TeV, adopted to the recent LHC run, and for 13 as well as 14 TeV, presumably relevant for the next round of LHC experiments, are presented. Kinematic regions with large momentum transfer are identified, where the corrections become large and may lead to strong distortions of differential distributions, thus mimicking anomalous top quark couplings. As a complementary case we investigate the threshold region, corresponding to configurations with small relative velocity between top and antitop quark, which is particularly sensitive to the top-quark Yukawa coupling. We demonstrate, that nontrivial upper limits on this coupling, complementary to those recently derived by the CMS and the ATLAS collaorations, are well within reach of ongoing experiments. We, furthermore, suggest a prescription that allows the implementation of these corrections in current Monte Carlo generators. Furthermore, the weak corrections are have been included in the publicly available Hathor library. The numerical results presented in this article use the same setup as the recently calculated NNLO QCD corrections. The results can thus be combined to give the most precise theoretical predictions.1

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Section: Introductionsupporting

confidence: 74%

Weak interactions in top-quark pair production at hadron colliders: An Update

Kühn¹,

Uwer²

2016

Proceedings of 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for

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“…The resummation of these large logarithmic contributions has been performed in recent years, both in momentum space with Soft Collinear Effective Theory (SCET) techniques [20][21][22] and in Mellin space [23][24][25]. In the latter case one finds [24] …”

Section: Jhep08(2015)076mentioning

confidence: 99%

Top quark pair production beyond NNLO

Muselli

Bonvini

Forte

et al. 2015

J. High Energ. Phys.

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Abstract:We construct an approximate expression for the total cross section for the production of a heavy quark-antiquark pair in hadronic collisions at next-to-next-to-nextto-leading order (N 3 LO) in α s . We use a technique which exploits the analyticity of the Mellin space cross section, and the information on its singularity structure coming from large N (soft gluon, Sudakov) and small N (high energy, BFKL) all order resummations, previously introduced and used in the case of Higgs production. We validate our method by comparing to available exact results up to NNLO. We find that N 3 LO corrections increase the predicted top pair cross section at the LHC by about 4% over the NNLO.

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“…A number of phenomenological studies have been presented in the literature [9][10][11][12][13][14][15][16][17]. Critical comparisons of the various approaches can be found in refs.…”

Section: Introductionmentioning

confidence: 99%

NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels

Czakon

Mitov

2012

J. High Energ. Phys.

456

351

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This is a second paper in our ongoing calculation of the next-to-next-to-leading order (NNLO) QCD correction to the total inclusive top-pair production cross-section at hadron colliders. In this paper we calculate the reaction qq → tt + qq which was not considered in our previous work on qq → tt + X [1] due to its phenomenologically negligible size. We also calculate all remaining fermion-pair-initiated partonic channels qq ′ , qq ′ and qq that contribute to top-pair production starting from NNLO. The contributions of these reactions to the total cross-section for top-pair production at the Tevatron and LHC are small, at the permil level. The most interesting feature of these reactions is their characteristic logarithmic rise in the high energy limit. We compute the constant term in the leading power behavior in this limit, and achieve precision that is an order of magnitude better than the precision of a recent theoretical prediction for this constant. All four partonic reactions computed in this paper are included in our numerical program Top++. The calculation of the NNLO corrections to the two remaining partonic reactions, qg → tt + X and gg → tt + X, is ongoing.

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Top-quark production and QCD

Cited by 44 publications

References 205 publications

Weak interactions in top-quark pair production at hadron colliders: An Update

Weak interactions in top-quark pair production at hadron colliders: An Update

Top quark pair production beyond NNLO

NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels

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