Results 11 to 20 of about 109,716 (280)
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
Double-real-virtual and double-virtual-real corrections to the three-loop thrust soft function
Journal of High Energy Physics, 2022 We compute the O $$ \mathcal{O} $$ ( α s 3 $$ {\alpha}_s^3 $$ ) double-real-virtual (RRV) and double-virtual-real (VVR) soft contributions to the thrust/zero-jettiness event shape.
Wen Chen, Feng Feng, Yu Jia, Xiaohui Liu
doaj +1 more source
One-loop Lipatov vertex in QCD with higher ϵ-accuracy
Journal of High Energy Physics, 2023 The effective Reggeon-Reggeon-gluon vertex, known as Lipatov vertex, is the key ingredient that allows to develop the BFKL approach in QCD. Within the next-to-leading logarithmic approximation, it is sufficient to know its one-loop corrections, in ...
Victor S. Fadin +2 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
core +2 more sources
Tensor reduction of loop integrals
Journal of High Energy Physics, 2023 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.
Charalampos Anastasiou +2 more
doaj +1 more source
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
doaj +1 more source
Recent developments in perturbative QCD [PDF]
, 2006 A brief overview of some recently active topics in perturbative QCD, including: string-inspired recursion techniques at tree level; recursion approaches and automation of standard techniques for 1-loop calculations; the status of NNLO jet calculations ...
Salam, Gavin P.
core +4 more sources
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
Higher order perturbative QCD calculation of jet cross sections ine + e − annihilation
Zeitschrift für Physik C Particles and Fields, 1982 We present in detail the analytic calculation of the Sterman-Weinberg type 3-jet cross section to order αs2 The fit to recent PLUTO data gives in the\({MS}\) scheme αs which corresponds to Λ=0.24 GeV in the 1-loop approximation.
K. Fabricius +3 more
openaire +1 more source
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
core +2 more sources