Results 21 to 30 of about 849 (148)
Meromorphic solutions of recurrence relations and DRA method for multicomponent master integrals
Journal of High Energy Physics, 2018 We formulate a method to find the meromorphic solutions of higher-order recurrence relations in the form of the sum over poles with coefficients defined recursively. Several explicit examples of the application of this technique are given.
Roman N. Lee, Kirill T. Mingulov
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Journal of High Energy Physics, 2020 Differential equations are a powerful tool for evaluating Feynman integrals. Their solution is straightforward if a transformation to a canonical form is found. In this paper, we present an algorithm for finding such a transformation.
Christoph Dlapa, Johannes Henn, Kai Yan
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Evaluating multi-loop Feynman integrals numerically through differential equations
Journal of High Energy Physics, 2019 The computation of Feynman integrals is often the bottleneck of multi-loop calculations. We propose and implement a new method to efficiently evaluate such integrals in the physical region through the numerical integration of a suitable set of ...
Manoj K. Mandal, Xiaoran Zhao
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Next-to-leading order electroweak corrections to off-shell WWW production at the LHC
Journal of High Energy Physics, 2018 Triboson processes allow for a measurement of the triple and quartic couplings of the Standard Model gauge bosons, which can be used to constrain anomalous gauge couplings.
Marek Schönherr
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Constructing d-log integrands and computing master integrals for three-loop four-particle scattering
Journal of High Energy Physics, 2020 We compute all master integrals for massless three-loop four-particle scattering amplitudes required for processes like di-jet or di-photon production at the LHC.
Johannes Henn +3 more
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Journal of High Energy Physics, 2022 We consider the problem of obtaining higher order in regularization parameter ε analytical results for master integrals with elliptics. The two commonly employed methods are provided by the use of differential equations and direct integration of ...
M. A. Bezuglov, A. I. Onishchenko
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Gluon fragmentation into quarkonium at next-to-leading order using FKS subtraction
Journal of High Energy Physics, 2019 We present the calculation at next-to-leading order (NLO) in α s of the fragmentation function of a gluon into heavy quarkonium in the color-octet spin-singlet S-wave channel.
Pierre Artoisenet, Eric Braaten
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NLO QCD+EW predictions for HV and HV +jet production including parton-shower effects
Journal of High Energy Physics, 2017 We present the first NLO QCD+EW predictions for Higgs boson production in association with a ℓν ℓ or ℓ + ℓ − pair plus zero or one jets at the LHC. Fixed-order NLO QCD+EW calculations are combined with a QCD+QED parton shower using the recently developed
F. Granata +3 more
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Journal of High Energy Physics, 2021 Using modern multiloop calculation methods, we derive the analytical expressions for the total cross sections of the processes e − γ → e − X X ¯ $$ {e}^{-}X\overline{X} $$ with X = μ, γ or e at arbitrary energies.
Roman N. Lee +2 more
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The one-loop amplitudes for Higgs + 4 partons with full mass effects
Journal of High Energy Physics, 2020 We present compact analytic formulae for the one-loop amplitudes for Higgs + 4 parton scattering, 0 → ggggh, 0 → q ¯ $$ \overline{q} $$ qggh and 0 → q ¯ $$ \overline{q} $$ q q ¯ ′ $$ {\overline{q}}^{\prime } $$ q′h, mediated by a loop of massive coloured
Lucy Budge +4 more
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