Two-loop leading-colour QCD helicity amplitudes for two-photon plus jet production at the LHC

Chawdhry, Herschel A.; Czakon, Michal; Mitov, Alexander; Poncelet, Rene

doi:10.48550/arxiv.2103.04319

Cited by 5 publications

(8 citation statements)

References 27 publications

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“…These processes are the current frontier of research, for which the required two-loop 5-point amplitudes have been only recently derived. In particular, two loop amplitudes for diphoton+jet production and 3-jet production have been derived in [16] and [17,18].…”

Section: Beyond 2 → 2 Processesmentioning

confidence: 99%

Status of NNLO QCD corrections for process with one or more jets in the final state at the LHC

Pires¹

2022

Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)

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The abundant amount of data to be collected by the ATLAS and CMS collaborations in future runs of the Large Hadron Collider at CERN opens up a new era of precision physics. Some of the most prominent precision observables are related to processes with one or more jets in the final state. In order to fully exploit the potential of the LHC and the HL-LHC, it is imperative to make theoretical predictions at the level of accuracy that matches or even exceeds that of the upcoming measurements. In this talk we present a review of the status of theoretical predictions including NNLO QCD corrections for process with one or more jets in the final state at the LHC.

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Section: Beyond 2 → 2 Processesmentioning

confidence: 99%

Status of NNLO QCD corrections for process with one or more jets in the final state at the LHC

Pires¹

2022

Proceedings of Particles and Nuclei International Conference 2021 — PoS(PANIC2021)

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“…The scale-independent part H (2) (s 12 ) is included in the leading color approximation as derived in ref. [40] with the help of refs. [41][42][43] (an equivalent expression for the spin-averaged two-loop squared amplitude has also been derived in ref.…”

Section: Setup Of the Calculationmentioning

confidence: 99%

NNLO QCD corrections to diphoton production with an additional jet at the LHC

Chawdhry,

Czakon,

Mitov

et al. 2021

Preprint

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We calculate the NNLO QCD corrections to diphoton production with an additional jet at the LHC. Our calculation represents the first NNLO-accurate prediction for the transverse momentum distribution of the diphoton system. The improvement in the accuracy of the theoretical prediction is significant, by a factor of up to four relative to NLO QCD. Our calculation is exact except for the finite remainder of the two-loop amplitude which is included at leading color. The numerical impact of this approximated contribution is small. The results of this work are expected to further our understanding of the Higgs boson sector and of the behavior of higher-order corrections to LHC processes.

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“…and in our convention the odd kinematics tr 5 can be treated as tr 5 = 12 [23] 34 [41] − [12] 23 [34] Given these definition, we introduce following letters that will occur in the remainder:…”

Section: Collinear Limit Of Lettersmentioning

confidence: 99%

“…These developments not only reveal rich mathematical structures in the formal aspects of QFTs, but also have important phenomenological applications such as in the Large Hadron Collider (LHC). At the moment, two-loop corrections for 2 → 3 processes have been at the frontier of amplitude computations which are under intense studies in last couple of years: based on the advancements of integral computations [3][4][5][6][7][8], a number of amplitudes have been obtained in compact analytic form, including all massless cases [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] and a two-loop five-point amplitude with one massive vector boson [25].…”

Section: Introductionmentioning

confidence: 99%

Bootstrapping a Two-Loop Four-Point Form Factor

Guo,

Wang,

Yang

2021

Preprint

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We compute the two-loop four-point form factor of a length-3 half-BPS operator in planar N = 4 SYM, which belongs to the class of two-loop five-point scattering observables with one off-shell colorsinglet leg. A new bootstrapping strategy is developed to obtain this result by starting with an ansatz expanded in terms of master integrals and then solving the master coefficients via various physical constraints. We find that consistency conditions of infrared divergences and collinear limits, together with the cancellation of spurious poles, can fix a significant part of the ansatz. The remaining degrees of freedom can be fixed by one simple type of two-double unitarity cut. Full analytic results in terms of both symbol and Goncharov polylogarithms are provided.

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Two-loop leading-colour QCD helicity amplitudes for two-photon plus jet production at the LHC

Abstract: We calculate the complete set of two-loop leading-colour QCD helicity amplitudes for γγj-production at hadron colliders. Our results are presented in a compact, fullyanalytical form.

Cited by 5 publications

References 27 publications

Status of NNLO QCD corrections for process with one or more jets in the final state at the LHC

Status of NNLO QCD corrections for process with one or more jets in the final state at the LHC

NNLO QCD corrections to diphoton production with an additional jet at the LHC

Bootstrapping a Two-Loop Four-Point Form Factor

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