Sector decomposition

G Heinrich - International Journal of Modern Physics A, 2008 - World Scientific
Sector decomposition is a constructive method to isolate divergences from parameter
integrals occurring in perturbative quantum field theory. We explain the general algorithm in …

production and decay at NLO

JM Campbell, RK Ellis - Journal of High Energy Physics, 2012 - Springer
A bstract We present results for the production of a top pair in association with a W-boson at
next-to-leading order. We have implemented this process into the parton-level integrator …

SecDec-3.0: numerical evaluation of multi-scale integrals beyond one loop

S Borowka, G Heinrich, SP Jones, M Kerner… - Computer Physics …, 2015 - Elsevier
SecDec is a program which can be used for the factorization of dimensionally regulated
poles from parametric integrals, in particular multi-loop integrals, and the subsequent …

Associated top quark pair production with a heavy boson: differential cross sections at NLO+ NNLL accuracy

A Kulesza, L Motyka, D Schwartländer, T Stebel… - The European Physical …, 2020 - Springer
We present theoretical predictions for selected differential cross sections for the process pp
→ t ̄ t B pp→ tt¯ B at the LHC, where B can be a Higgs (H), a Z or a W boson. The …

[HTML][HTML] Associated production of a top quark pair with a heavy electroweak gauge boson at NLO+ NNLL accuracy

A Kulesza, L Motyka, D Schwartländer, T Stebel… - The European Physical …, 2019 - Springer
We perform threshold resummation of soft gluon corrections to the total cross sections and
the invariant mass distributions for production of a top-antitop quark pair associated with a …

[HTML][HTML] Next-to-leading order QCD corrections to tt Z production at the LHC

A Lazopoulos, T McElmurry, K Melnikov, F Petriello - Physics Letters B, 2008 - Elsevier
We present a calculation of the full next-to-leading order QCD corrections to the scattering
process pp→ tt¯ Z. This channel will be used to measure the tt¯ Z electroweak couplings at …

Polarizing the dipoles

M Czakon, CG Papadopoulos… - Journal of High Energy …, 2009 - iopscience.iop.org
We extend the massless dipole formalism of Catani and Seymour, as well as its massive
version as developed by Catani, Dittmaier, Seymour and Trocsanyi, to arbitrary helicity …

[HTML][HTML] Top-quark charge asymmetry and polarization in tt¯ W±production at the LHC

F Maltoni, ML Mangano, I Tsinikos, M Zaro - Physics Letters B, 2014 - Elsevier
We study the charge asymmetry between the t and t¯ quarks at the LHC, when they are
produced in association with a W boson. Though sizably reducing the cross section with …

Renormalization group improved predictions for production at hadron colliders

HT Li, CS Li, SA Li - Physical Review D, 2014 - APS
We study the factorization and resummation of the tt¯ W±production at hadron colliders. The
cross section in the threshold limit can be factorized into a convolution of hard and soft …

Generalized unitarity at work: first NLO QCD results for hadronic W+ 3 jet production

RK Ellis, K Melnikov, G Zanderighi - Journal of High Energy …, 2009 - iopscience.iop.org
We compute the leading color, next-to-leading order QCD corrections to the dominant
partonic channels for the production of a W boson in association with three jets at the …