Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Bernd A. Kniehl"'
Autor:
Bernd A. Kniehl, Vladimir V. Bytev
Publikováno v:
Nuclear Physics B, Vol 952, Iss, Pp-(2020)
Nuclear Physics
Nuclear Physics
We consider the derivatives of Horn hypergeometric functions of any number of variables with respect to their parameters. The derivative of such a function of n variables is expressed as a Horn hypergeometric series of n+1 infinite summations dependi
Autor:
Bernd A. Kniehl, V.N. Velizhanin
Publikováno v:
Nuclear Physics B. 968:115429
We compute the non-planar contribution to the universal anomalous dimension of twist-two operators in N = 4 supersymmetric Yang-Mills theory at four loops through Lorentz spin eighteen. Exploiting the results of this and our previous calculations alo
Autor:
Mikhail Yu. Kalmykov, Bernd A. Kniehl
Publikováno v:
Journal of High Energy Physics, Vol 2017, Iss 7, Pp 1-28 (2017)
Journal of High Energy Physics
Journal of high energy physics 2017(7), 31 (2017). doi:10.1007/JHEP07(2017)031
Journal of High Energy Physics
Journal of high energy physics 2017(7), 31 (2017). doi:10.1007/JHEP07(2017)031
A number of irreducible master integrals for L-loop sunrise and bubble Feynman diagrams with generic values of masses and external momenta are explicitly evaluated via the Mellin-Barnes representation.
Publikováno v:
Nuclear Physics B. 836:129-170
The differential-reduction algorithm, which allows one to express generalized hypergeometric functions with parameters of arbitrary values in terms of such functions with parameters whose values differ from the original ones by integers, is discussed
Autor:
M.Yu. Kalmykov, Bernd A. Kniehl
Publikováno v:
Nuclear Physics B - Proceedings Supplements. :129-134
We briefly discuss the transcendental constants generated through the epsilon-expansion of generalized hypergeometric functions and their interrelation with the "sixth root of unity."
Comment: 6 pages, presented at "Loops and Legs in Quantum Fie
Comment: 6 pages, presented at "Loops and Legs in Quantum Fie
Autor:
Bernd A. Kniehl
Publikováno v:
Physical review / D 89(11), 116010 (2014). doi:10.1103/PhysRevD.89.116010
We consider a mixed system of unstable Majorana fermions in a general parity-nonconserving theory and renormalize its propagator matrix to all orders in the pole scheme, in which the squares of the renormalized masses are identified with the complex
Autor:
Bernd A. Kniehl
Publikováno v:
Physical review / D 89(9), 096005 (2014). doi:10.1103/PhysRevD.89.096005
We consider a system of unstable Dirac fermions in a general parity-nonconserving theory with intergeneration mixing and explain how to renormalize its propagator matrix to all orders in perturbation theory. We work in the pole scheme, in which the s
Autor:
Bernd A. Kniehl, Alberto Sirlin
Publikováno v:
Physical review / D 90(7), 077901 (2014). doi:10.1103/PhysRevD.90.077901
We discuss the generalization of the Dirac equations and spinors in momentum space to free unstable spin-$1/2$ fermions taking into account the fundamental requirement of Lorentz covariance. We derive the generalized adjoint Dirac equations and spino
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2a2e766f22ee8b811afe3271441d3fc
Autor:
Bernd A. Kniehl, Alberto Sirlin
Publikováno v:
Physical Review Letters. 81:1373-1376
The differences between the on-shell mass and width of the Higgs boson and their pole counterparts are evaluated in leading order. For a heavy Higgs boson, they are found to be sensitive functions of the gauge parameter and become numerically large o
Autor:
Eduardo A. Notte-Cuello, Igor Kondrashuk, Pedro Allendes, Marko Antonio Rojas-Medar, Bernd A. Kniehl
Publikováno v:
NUCLEAR PHYSICS B
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
NUCLEAR PHYSICS B, PROCEEDINGS SUPPLEMENTS
Red Report (2012).
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
NUCLEAR PHYSICS B, PROCEEDINGS SUPPLEMENTS
Red Report (2012).
We consider Mellin-Barnes transform of triangle ladder-like scalar diagram in d=4 dimensions. It is shown how the multi-fold MB transform of the momentum integral corresponding to an arbitrary number of rungs is reduced to the two-fold MB transform.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2041e23a378e40aad404b795b9ae3766