Results 11 to 20 of about 109,202 (281)
An extensive survey of the estimation of uncertainties from missing higher orders in perturbative calculations [PDF]
Journal of High Energy Physics, 2014 We consider two approaches to estimate and characterise the theoretical uncertainties stemming from the missing higher orders in perturbative calculations in Quantum Chromodynamics: the traditional one based on renormalisation and factorisation scale ...
Bagnaschi, Emanuele +3 more
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An analysis of Bayesian estimates for missing higher orders in perturbative calculations [PDF]
Journal of High Energy Physics, 2021 Abstract With current high precision collider data, the reliable estimation of theoretical uncertainties due to missing higher orders (MHOs) in perturbation theory has become a pressing issue for collider phenomenology. Traditionally, the size of the MHOs is estimated through scale variation, a simple but ad hoc method without ...
Claude Duhr +3 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 ...
Reiko SAITO, Satoru KATSURAGI
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Transverse momentum resummation at N3LL+NNLO for diboson processes
Journal of High Energy Physics, 2023 Diboson processes are one of the most accessible and stringent probes of the electroweak gauge structure of the Standard Model at the LHC. They will be probed at the percent level at the high-luminosity LHC, challenging current theory predictions.
John M. Campbell +3 more
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Deciphering colour building blocks of massive multiparton amplitudes at 4-loops and beyond
Journal of High Energy Physics, 2023 The soft function in non-abelian gauge theories exponentiate, and their logarithms can be organised in terms of the collections of Feynman diagrams called Cwebs.
Neelima Agarwal +3 more
doaj +1 more source
One-loop self-energy correction to the 1s and 2s hyperfine splitting in H-like systems [PDF]
, 2001 The one-loop self-energy correction to the hyperfine splitting of the 1s and 2s levels in H-like low-Z atoms is evaluated to all orders in Z\alpha. The results are compared to perturbative calculations. The residual higher-order contribution is evaluated.
A. Layzer +31 more
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Topological Strings and Quantum Spectral Problems [PDF]
, 2014 We consider certain quantum spectral problems appearing in the study of local Calabi-Yau geometries. The quantum spectrum can be computed by the Bohr-Sommerfeld quantization condition for a period integral.
Huang, Min-xin, Wang, Xian-fu
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One-loop matrix element emulation with factorisation awareness
Journal of High Energy Physics, 2023 In this article we present an emulation strategy for one-loop matrix elements. This strategy is based on the factorisation properties of matrix elements and is an extension of the work presented in [1].
D. Maître, H. Truong
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Building blocks of Cwebs in multiparton scattering amplitudes
Journal of High Energy Physics, 2022 The correlators of Wilson-line operators in non-abelian gauge theories are known to exponentiate, and their logarithms can be organised in terms of the collections of Feynman diagrams called Cwebs.
Neelima Agarwal +3 more
doaj +1 more source
Connecting Different TMD Factorization Formalisms in QCD [PDF]
, 2017 In the original Collins-Soper-Sterman (CSS) presentation of the results of transverse-momentum-dependent (TMD) factorization for the Drell-Yan process, results for perturbative coefficients can be obtained from calculations for collinear factorization ...
Collins, John, Rogers, Ted C.
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