Recola & Recola2

Recola releases

Recola 1.4.0 features:

  • LO and NLO helicity and color amplitudes
  • LO and NLO amplitudes squared amplitudes, optionally polarized
  • LO and NLO colour-correlated squared amplitudes for dipole subtraction
  • LO spin-correlated squared amplitudes for dipole subtraction
  • Dimreg for UV and IR singularities, optionally mass regularization (collinear)
  • Possibility for the selection of factorizable corrections in the pole approximation
  • \(\alpha_0\), \(\alpha_\mathrm{Z}\), \(G_\mathrm{F}\) schemes for the electromagnetic coupling constant \(\alpha\)
  • Fixed and running \(N_f\) flavour scheme for strong coupling constant \(\alpha_s\)
  • Complex-mass scheme for unstable particles
  • Fortran95 and C++ interfaces exemplified with demo files

Recola2 releases

The Recola2 library (version 2.2.0) extends these features by:

  • Additional model files in extended Higgs-sectors
  • Complementary model files formulated in the Background-Field Method
  • An intuitive Python interface with a built-in documentation
  • Memory optimzations for crossing related processes
  • LO and NLO spin-(colour-) correlated squared amplitudes

Release history

19/2/2019

release of recola2-2.2.0, recola2-collier-2.2.0,recola-1.4.0, recola-collier-1.4.0:

Recola1/Recola2:
  • Spin correlator a la Powheg
  • Process summary log
Recola2:
  • Global collier cache mode (see collier interface)
  • Performance boost for process generation and computation (Recola1 optimizations).
28/12/2018

release of recola2-2.1.7, recola2-collier-2.1.7:

  • Updated interface for extended Higgs sectors
  • Dynamic scales setting
  • Complete NLO correlations (spin-colour/colour/spin + loop-induced)
  • Use of crossing symmetry in process generation
  • Improved memory management for generated processes
16/01/2018

release of recola2-2.1.0, recola2-collier-2.1.0, recola-1.3.0, recola-collier-1.3.0:

  • 1-loop colour correlations
  • Selection of quark-line topologies (s,t,u channel)
  • CMake installation (make install)
  • Testing suite (make check)
  • Fix overflow bug in Recola
  • Fix segmentation fault in Recola/Recola2
19/09/2017

release of recola2-2.0.0 and recola2-collier-2.0.0:

  • Model independent version of Recola
  • Python/C++ interface
18/04/2017

release of recola-1.2 and recola-collier-1.2:

  • C++ interface
  • numerically stable computation of invariants
22/12/2016

release of recola-1.1 and recola-collier-1.1:

  • additional user methods
  • fix momenta corrections
  • fix R2 vertex \(\gamma\; \tau^-\; \tau^+\)
04/05/2016
release of recola-1.0 and recola-collier-1.0