24 Result(s)
within
Charalampos Anastasiou
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Open AccessEfficiently evaluating loop integrals in the EFTofLSS using QFT integrals with massive propagators
We develop a new way to analytically calculate loop integrals in the Effective Field Theory of Large Scale-Structure. Previous available methods show severe limitations beyond the one-loop power spectrum due t...
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Open AccessTensor reduction of loop integrals
The computational cost associated with reducing tensor integrals to scalar integrals using the Passarino-Veltman method is dominated by the diagonalisation of large systems of equations. These systems of equat...
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Open AccessLocally finite two-loop QCD amplitudes from IR universality for electroweak production
We describe the implementation of infrared subtractions for two-loop QCD corrections to quark-antiquark annihilation to electroweak final states. The subtractions are given as form-factor integrands whose inte...
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Open AccessLocally finite two-loop amplitudes for off-shell multi-photon production in electron-positron annihilation
We study the singularity structure of two-loop QED amplitudes for the production of multiple off-shell photons in massless electron-positron annihilation and develop counterterms that remove their infrared and...
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Open AccessErratum to: Light quark mediated Higgs boson threshold production in the next-to-leading logarithmic approximation
In the paper a NLL contribution of the gluon vertex correction figure 4(c) has been omitted.
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Open AccessLight quark mediated Higgs boson threshold production in the next-to-leading logarithmic approximation
We study the amplitude of the Higgs boson production in gluon fusion mediated by a light quark loop and evaluate the logarithmically enhanced radiative corrections to the next-to-leading logarithmic approximat...
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Open AccessQuark mass effects in two-loop Higgs amplitudes
We provide two two-loop amplitudes relevant for precision Higgs physics. The first is the two-loop amplitude for Higgs boson production through gluon fusion with exact dependence on the top quark mass up to sq...
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Open AccessRemoving infrared divergences from two-loop integrals
Feynman amplitudes at higher orders in perturbation theory generically have complex singular structures. Notwithstanding the emergence of many powerful new methods, the presence of infrared divergences poses s...
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Open AccessOne-loop QCD contributions to differential cross-sections for Higgs production at N3LO
We present one-loop contributions to the fully differential Higgs boson gluon-fusion cross-section for Higgs production via gluon fusion. Our results constitute a necessary ingredient of a complete N3LO determina...
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Open AccessMixed QCD-electroweak corrections to Higgs production via gluon fusion in the small mass approximation
We compute the mixed QCD-electroweak corrections to the cross section for the production of a Higgs boson via gluon fusion, in the limit of a small mass of the electroweak gauge bosons. This limit is regular a...
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Open AccessCP-even scalar boson production via gluon fusion at the LHC
In view of the searches at the LHC for scalar particle resonances in addition to the 125 GeV Higgs boson, we present the cross-section for a CP-even scalar produced via gluon fusion at N3LO in perturbative QCD as...
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Open AccessHigh precision determination of the gluon fusion Higgs boson cross-section at the LHC
We present the most precise value for the Higgs boson cross-section in the gluon-fusion production mode at the LHC. Our result is based on a perturbative expansion through N3LO in QCD, in an effective theory wher...
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Open AccessSoft expansion of double-real-virtual corrections to Higgs production at N3LO
We present methods to compute higher orders in the threshold expansion for the one-loop production of a Higgs boson in association with two partons at hadron colliders. This process contributes to the N3LO Higgs ...
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Open AccessHiggs boson gluon-fusion production beyond threshold in N3LO QCD
In this article, we compute the gluon fusion Higgs boson cross-section at N3LO through the second term in the threshold expansion. This calculation constitutes a major milestone towards the full N3LO cross sectio...
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Article
Open AccessNNLO QCD corrections to pp → γ * γ * in the large N F limit
We compute the NNLO QCD corrections for the hadroproduction of a pair of off-shell photons in the limit of a large number of quark flavors. We perform a reduction of the two-loop amplitude to master integrals ...
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Open AccessReal-virtual contributions to the inclusive Higgs cross-section at N3LO
We compute the contributions to the N3LO inclusive Higgs boson cross-section from the square of one-loop amplitudes with a Higgs boson and three QCD partons as external states. Our result is a Taylor expansion in...
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Soft triple-real radiation for Higgs production at N3LO
We present the two first terms in the threshold expansion of Higgs production partonic cross-sections at hadron colliders for processes with three partons in the final state. These are contributions to the inc...
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NNLO phase space master integrals for two-to-one inclusive cross sections in dimensional regularization
We evaluate all phase space master integrals which are required for the total cross section of generic 2 → 1 processes at NNLO as a series expansion in the dimensional regulator ∈. Away from the limit of threshol...
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Article
Inclusive Higgs boson cross-section for the LHC at 8 TeV
We present the inclusive Higgs boson cross-section at the LHC with collision energy of 8 TeV. Our predictions are obtained using our publicly available program iHixs which incorporates NNLO QCD corrections and...
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The fully differential decay rate of a Higgs boson to bottom-quarks at NNLO in QCD
The decay of a light Higgs boson to bottom quarks is dominant and can be exploited for the discovery of the Higgs particle and the measurement of its properties at the LHC and future collider experiments. We p...
