On-shell methods in perturbative QCD
We review on-shell methods for computing multi-parton scattering amplitudes in perturbative
QCD, utilizing their unitarity and factorization properties. We focus on aspects which are …
QCD, utilizing their unitarity and factorization properties. We focus on aspects which are …
Hard interactions of quarks and gluons: a primer for LHC physics
In this paper, we will develop the perturbative framework for the calculation of hard-
scattering processes. We will undertake to provide both a reasonably rigorous development …
scattering processes. We will undertake to provide both a reasonably rigorous development …
Automated implementation of on-shell methods for one-loop amplitudes
We present the first results from BlackHat, an automated C++ program for calculating one-
loop amplitudes. The program implements the unitarity method and on-shell recursion to …
loop amplitudes. The program implements the unitarity method and on-shell recursion to …
Two-loop integrand decomposition into master integrals and surface terms
H Ita - Physical Review D, 2016 - APS
Loop amplitudes are conveniently expressed in terms of master integrals whose coefficients
carry the process dependent information. Similarly before integration, the loop integrands …
carry the process dependent information. Similarly before integration, the loop integrands …
Standard Model EFTs via on-shell methods
MA Huber, S De Angelis - Journal of High Energy Physics, 2021 - Springer
A bstract We present the Standard Model Effective Field Theories (SMEFT) from purely on-
shell arguments. Starting from few basics assumptions such as Poincaré invariance and …
shell arguments. Starting from few basics assumptions such as Poincaré invariance and …
Assault on the NLO Wishlist: pp→ ttbb
We present the results of a next-to-leading order calculation of QCD corrections to the
production of an on-shell top-anti-top quark pair in association with two flavored b-jets …
production of an on-shell top-anti-top quark pair in association with two flavored b-jets …
Direct extraction of one-loop integral coefficients
D Forde - Physical Review D—Particles, Fields, Gravitation, and …, 2007 - APS
We present a general procedure for obtaining the coefficients of the scalar bubble and
triangle integral functions of one-loop amplitudes. Coefficients are extracted by considering …
triangle integral functions of one-loop amplitudes. Coefficients are extracted by considering …
Uniqueness of two-loop master contours
S Caron-Huot, KJ Larsen - Journal of High Energy Physics, 2012 - Springer
A bstract Generalized-unitarity calculations of two-loop amplitudes are performed by
expanding the amplitude in a basis of master integrals and then determining the coefficients …
expanding the amplitude in a basis of master integrals and then determining the coefficients …
NLO QCD corrections to top anti-top bottom anti-bottom production at the LHC: 2. Full hadronic results
A Bredenstein, A Denner, S Dittmaier… - arxiv preprint arxiv …, 2010 - arxiv.org
We present predictions for top anti-top bottom anti-bottom production at the LHC in next-to-
leading order QCD. The precise description of this background process is a prerequisite to …
leading order QCD. The precise description of this background process is a prerequisite to …
Maximally supersymmetric planar Yang-Mills amplitudes at five loops
We present an Ansatz for the planar five-loop four-point amplitude in maximally
supersymmetric Yang-Mills theory in terms of loop integrals. This Ansatz exploits the recently …
supersymmetric Yang-Mills theory in terms of loop integrals. This Ansatz exploits the recently …