Towards stability of NLO corrections in high-energy factorization via modified multi-Regge kinematics approximation

Nefedov, Maxim

doi:10.1007/jhep08(2020)055

Cited by 23 publications

(16 citation statements)

References 66 publications

(142 reference statements)

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“…[8], the inclusion of real NLO corrections is studied in Ref. [9], the development of PRA in the full one-loop NLO approximation is further discussed in [18][19][20].…”

Section: High-energy Factorizationmentioning

confidence: 99%

Production of three isolated photons in the high-energy factorization approach

Saleev¹

2021

Preprint

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We study large-p T three-photon production at the LHC at the center-of-mass energy s = 8 TeV. We use the LO approximation of the parton Reggeization approach consistently merged with the real NLO corrections. For numerical calculations use the parton-level generator KaTie and modified KMR-type unintegrated parton distribution functions. We find good agreement between our predictions and data with the same accuracy as in the NNLO calculations based on the collinear parton model of QCD. At higher energies ( s = 13 and 27 TeV) parton Reggeization approach predicts larger cross sections, up to ∼ 10 % and ∼ 20 %, respectively.

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“…[8], the inclusion of real NLO corrections is studied in Ref. [9], the development of PRA in the full one-loop NLO approximation is further discussed in [18][19][20].…”

Section: High-energy Factorizationmentioning

confidence: 99%

Production of three isolated photons in the high-energy factorization approach

Saleev¹

2021

Preprint

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“…From a formal point of view, the result will be useful to study further the resummation of soft-collinear logarithms within high energy factorization, see i.e. [77][78][79][80] as well as the proper definition of evolution equations for transverse momentum dependent evolution kernels along the lines of [81][82][83].…”

Section: Discussionmentioning

confidence: 99%

Forward Higgs production within high energy factorization in the heavy quark limit at next-to-leading order accuracy

2021

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We use Lipatov’s high energy effective action to determine the next-to-leading order corrections to Higgs production in the forward region within high energy factorization making use of the infinite top mass limit. Our result is based on an explicit calculation of real corrections combined with virtual corrections determined earlier by Nefedov. As a new element we provide a proper definition of the desired next-to-leading order coefficient within the high energy effective action framework, extending a previously proposed prescription. We further propose a subtraction mechanism to achieve for this coefficient a stable cancellation of real and virtual infra-red singularities in the presence of external off-shell legs. Apart from its relevance for direct phenomenological studies, such as high energy resummation of Higgs $$+$$ + jet configurations, our result will be further of use for the study of transverse momentum dependent factorization in the high energy limit.

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“…[32,33], the inclusion of real NLO corrections in the PRA was studied in Ref. [33], the development of PRA in the full one-loop NLO approximation was further discussed in [34][35][36].…”

Section: Parton Reggeization Approachmentioning

confidence: 99%

“…The formalism [46,47] for numerical generation of off-shell amplitudes is equivalent to the results of Lipatov's EFT at the tree level [32,33,48]. We should note here, that for the generalization of the formalism to full NLO level [34,35], the use of explicit Feynman rules and the structure of EFT is more convenient.…”

Section: Details Of Numerical Calculationsmentioning

confidence: 99%

Production of three isolated photons in the parton Reggeization approach at high energies

Karpishkov,

Saleev

2022

Preprint

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We study a large-p T three-photon production in proton-proton collisions at the LHC. We use the leading order (LO) approximation of the parton Reggeization approach consistently merged with the next-to-leading order corrections originated from the emission of additional jet. For numerical calculations we use the parton-level generator KaTie and modified KMR-type unintegrated parton distribution functions which satisfy exact normalization conditions for arbitrary x. We compare our prediction with data from ATLAS collaboration at the center-of-mass energy √ s = 8 TeV. We find that the inclusion of the real next-to-leading-order corrections leads to a good agreement between our predictions and data with the same accuracy as for the next-to-next-to-leading calculations based on the collinear parton model of QCD. At higher energies ( √ s = 13 and 27 TeV) partonReggeization approach predicts larger cross sections, up to ∼ 15 % and ∼ 30 %, respectively.

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Towards stability of NLO corrections in high-energy factorization via modified multi-Regge kinematics approximation

Cited by 23 publications

References 66 publications

Production of three isolated photons in the high-energy factorization approach

Production of three isolated photons in the high-energy factorization approach

Forward Higgs production within high energy factorization in the heavy quark limit at next-to-leading order accuracy

Production of three isolated photons in the parton Reggeization approach at high energies

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