Top-quark pair production at the LHC: fully differential QCD predictions at NNLO

Catani, Stefano; Devoto, Simone; Grazzini, Massimiliano; Kallweit, Stefan; Mazzitelli, Javier

doi:10.1007/jhep07(2019)100

Cited by 133 publications

(139 citation statements)

References 116 publications

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“…For a correct interpretation of current and future measurements and the possible identification of BSM effects, precise predictions for these processes, and, consequently, the study of their radiative corrections, are of paramount relevance. For top-quark pair and singletop production next-to-next-to-leading (NNLO) QCD corrections were computed in [22][23][24][25][26]. For top pair production, also next-to-leading-order (NLO) electroweak (EW) corrections [27,28] and/or next-to-next-to-leading-logarithmic (NNLL) accuracy resummation of threshold and small-mass logarithms [29,30]) were accounted for.…”

Section: Contentsmentioning

confidence: 99%

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections

Broggio

Ferroglia

Frederix

et al. 2019

J. High Energ. Phys.

109

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This work studies the associated production of a top-quark pair with a W , Z, or Higgs boson at the LHC. Predictions for the total cross sections as well as for several differential distributions of the massive particles in the final state are provided. These predictions, valid for the LHC operating at 13 TeV, include without any approximation all the NLO electroweak and QCD contributions of O(α i s α j+1 ) with i + j = 2, 3. In addition, the predictions presented here improve upon the NLO QCD results by adding the effects of soft gluon emission corrections resummed to next-to-next-to-leading logarithmic accuracy. The residual dependence of the predictions on scale and PDF choices is analyzed.

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Section: Contentsmentioning

confidence: 99%

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections

Broggio

Ferroglia

Frederix

et al. 2019

J. High Energ. Phys.

109

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“…[28,29]. In the case of heavyquark production the r cut dependence is found to be linear [25,26,30], and it is an interesting question to investigate the origin of this peculiar behavior.…”

Section: Introductionmentioning

confidence: 99%

The $$q_T$$ subtraction method: electroweak corrections and power suppressed contributions

2020

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Building upon the formulation of transverse-momentum resummation for heavy-quark hadroproduction, we present the first application of the q T subtraction formalism to the computation of electroweak corrections to massive lepton pairs through the Drell-Yan mechanism. We then study the power suppressed contributions to the q T subtraction formula in the parameter r cut , defined as the minimum transverse momentum of the lepton pair normalised to its invariant mass. We analytically compute the leading power correction from initial and final-state radiation to the inclusive cross section. In the case of initial-state radiation the power correction is quadratic in r cut and our analytic result is consistent with results previously obtained in the literature. Finalstate radiation produces linear contributions in r cut that may challenge the efficiency of the q T subtraction procedure. We explicitly compute the linear power correction in the case of the inclusive cross section and we discuss the extension of our calculation to differential distributions.

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“…These coefficients are known at the next-to-next-to-leading order (NNLO) for the TMDPDFs [37][38][39][40] and TMDFFs [40]. They have played an important role in a number of cutting-edge calculations, including precision predictions for the Drell-Yan process and Higgs boson production at small transverse momentum [10,29,30], and NNLO calculations for top quark pair production using the Q T subtraction method [41,42].…”

Section: Introductionmentioning

confidence: 99%

Transverse parton distribution and fragmentation functions at NNLO: the quark case

Luo

Wang

et al. 2019

J. High Energ. Phys.

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We revisit the calculation of perturbative quark transverse momentum dependent parton distribution functions and fragmentation functions using the exponential regulator for rapidity divergences. We show that the exponential regulator provides a consistent framework for the calculation of various ingredients in transverse momentum dependent factorization. Compared to existing regulators in the literature, the exponential regulator has a couple of advantages which we explain in detail. As a result, the calculation is greatly simplified and we are able to obtain the next-to-next-to-leading order results up to O( 2 ) in dimensional regularization. These terms are necessary for a higher order calculation which is made possible with the simplification brought by the new regulator. As a by-product, we have obtained the two-loop quark jet function for the Energy-Energy Correlator in the back-to-back limit, which is the last missing ingredient for its N 3 LL resummation.

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Top-quark pair production at the LHC: fully differential QCD predictions at NNLO

Cited by 133 publications

References 116 publications

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections

Top-quark pair hadroproduction in association with a heavy boson at NLO+NNLL including EW corrections

The $$q_T$$ subtraction method: electroweak corrections and power suppressed contributions

Transverse parton distribution and fragmentation functions at NNLO: the quark case

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