Results 31 to 40 of about 17,573 (205)
QCD static force in gradient flow
Journal of High Energy Physics, 2022 We compute the QCD static force and potential using gradient flow at next-to-leading order in the strong coupling. The static force is the spatial derivative of the static potential: it encodes the QCD interaction at both short and long distances.
Nora Brambilla +3 more
doaj +1 more source
Computation of NLO processes involving heavy quarks using Loop-Tree Duality [PDF]
AIP Conference Proceedings, 2017 We present a new method to compute higher-order corrections to physical cross-sections, at Next-to-Leading Order and beyond. This method, based on the Loop Tree Duality, leads to locally integrable expressions in four dimensions. By introducing a physically motivated momentum mapping between the momenta involved in the real and the virtual ...
openaire +2 more sources
Extending the MINLO method [PDF]
, 2016 We consider improving POWHEG+MINLO simulations, so as to also render them NLO accurate in the description of observables receiving contributions from events with lower parton multiplicity than present in their underlying NLO calculation.
Frederix, Rikkert, Hamilton, Keith
core +3 more sources
Muon-electron scattering at NLO
Journal of High Energy Physics, 2019 We consider the process of muon-electron elastic scattering, which has been proposed as an ideal framework to measure the running of the electromagnetic coupling constant at space-like momenta and determine the leading-order hadronic contribution to the ...
Massimo Alacevich +5 more
doaj +1 more source
Computing decay rates for new physics theories with FeynRules and MadGraph 5_aMC@NLO [PDF]
Computer Physics Communications, 2015 32 pages, 2 figures.
Alwall, Johan +5 more
openaire +4 more sources
Master integrals for the NNLO virtual corrections to μe scattering in QED: the planar graphs
Journal of High Energy Physics, 2017 We evaluate the master integrals for the two-loop, planar box-diagrams contributing to the elastic scattering of muons and electrons at next-to-next-to leading-order in QED.
Pierpaolo Mastrolia +3 more
doaj +1 more source
Automation of NLO computations using the FKS subtraction method [PDF]
Proceedings of RADCOR 2009 - 9th International Symposium on Radiative Corrections (Applications of Quantum Field Theory to Phenomenology) — PoS(RADCOR2009), 2010 In this talk the FKS subtraction method for next-to-leading order (in QCD) computations is reviewed and its automation in the computer code MadFKS is presented. As a proof of concept, some results in the form of plots for distributions at next-to-leading order in e+e− → 2, 3 and 4 jets are shown by interfacing this code to BlackHat and Rocket.
openaire +2 more sources
The complete NLO corrections to dijet hadroproduction [PDF]
, 2016 We study the production of jets in hadronic collisions, by computing all contributions proportional to $\alpha_S^n\alpha^m$, with $n+m=2$ and $n+m=3$. These correspond to leading and next-to-leading order results, respectively, for single-inclusive and ...
Frederix, Rikkert +5 more
core +1 more source
Charge asymmetry in electron/positron energy loss in nuclear Bremsstrahlung
Journal of High Energy Physics, 2021 We calculate the leading Coulomb correction to the Bremsstrahlung energy loss in the electron-nucleus collisions for arbitrary energy of the incoming particle. This correction determines the charge asymmetry, i.e., the difference of electron and positron
Roman N. Lee, Andrey F. Pikelner
doaj +1 more source
The one-loop amplitudes for Higgs + 4 partons with full mass effects
Journal of High Energy Physics, 2020 We present compact analytic formulae for the one-loop amplitudes for Higgs + 4 parton scattering, 0 → ggggh, 0 → q ¯ $$ \overline{q} $$ qggh and 0 → q ¯ $$ \overline{q} $$ q q ¯ ′ $$ {\overline{q}}^{\prime } $$ q′h, mediated by a loop of massive coloured
Lucy Budge +4 more
doaj +1 more source