Results 31 to 40 of about 66,503 (311)
Journal of High Energy Physics, 2022 The master integrals for the mixed QCD-QED two-loop virtual corrections to the charged-current Drell-Yan process q q ¯ $$ q\overline{q} $$ ′ → ℓν are computed analytically by using the differential equation method.
Ming-Ming Long +6 more
doaj +1 more source
Weak structure functions in νl−N and νl−A scattering with nonperturbative and higher order perturbative QCD effects [PDF]
Physical Review D, 2019 We study the effect of various perturbative and nonperturbative QCD corrections on the free nucleon structure functions ($F_{iN}^{WI}(x,Q^2); ~i=1-3$) and their implications in the determination of nuclear structure functions.
F. Zaidi +4 more
semanticscholar +1 more source
The parton-level structure of e+e − to 2 jets at N3LO
Journal of High Energy Physics, 2023 We investigate the quantum chromodynamics (QCD) corrections to hadronic final states in electron-positron collisions at O $$ \mathcal{O} $$ ( α s 3 $$ {\alpha}_s^3 $$ ) in the strong coupling constant α s . Namely, we analytically compute the total cross
Petr Jakubčík +2 more
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Two-loop tensor integral coefficients in OpenLoops
Journal of High Energy Physics, 2022 We present a new and fully general algorithm for the automated construction of the integrands of two-loop scattering amplitudes. This is achieved through a generalisation of the open-loops method to two loops.
Stefano Pozzorini +2 more
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Higher Order Perturbation Method in Reactor Calculation [PDF]
Journal of Nuclear Science and Technology, 1969 The higher order perturbation theory is applied to the one-dimensional multi-group diffusion equation. The method of calculating the eigenvalue, eigenfunction and adjoint function of the higher mode is established for a non-Hermetian matrix. The diffusion equation is solved by the higher order perturbation method, through the use of the eigenvalues ...
SAITO, Reiko, KATSURAGI, Satoru
openaire +1 more source
A general algorithm to build mixed real and virtual antenna functions for higher-order calculations
Journal of High Energy Physics, 2023 The antenna-subtraction technique has demonstrated remarkable effectiveness in providing next-to-next-to-leading order in α s (NNLO) predictions for a wide range of processes relevant for the Large Hadron Collider.
Oscar Braun-White +2 more
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NLO computation of diffractive di-hadron production in a saturation framework
Journal of High Energy Physics, 2023 The cross-sections of diffractive double hadron photo- or electroproduction with large p T , on a nucleon or a nucleus, are calculated to NLO accuracy.
Michael Fucilla +4 more
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Higher order spectra of weak lensing convergence maps in parametrized theories of modified gravity [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We compute the low-ℓ limit of the family of higher order spectra for projected (2D) weak lensing convergence maps. In this limit these spectra are computed to an arbitrary order using tree-level perturbative calculations.
D. Munshi, J. McEwen
semanticscholar +1 more source
Tools for perturbative high-precision calculations
Proceedings of The Ninth Annual Conference on Large Hadron Collider Physics — PoS(LHCP2021), 2021 Current higher-order calculations heavily rely on publicly available tools. These are not necessarily computer programs, but it is anything that aids in different steps of calculations, e.g.
T. Neumann
semanticscholar +1 more source
Quasinormal modes of black holes. II. Padé summation of the higher-order WKB terms [PDF]
Physical Review D, 2019 In previous work [1] we proposed an improvement of the WKB-based semianalytic technique of Iyer and Will for calculation of the quasiormal modes of black holes by constructing the Pade approximants of the formal series for $\omega^{2}.$ It has been ...
J. Matyjasek, Małgorzata Telecka
semanticscholar +1 more source