LL2014 - (other Loops and Legs conferences)

27 April 2014 - 02 May, 2014

Weimar, Germany

Weimar, Germany

The bi-annual international conference “Loops and Legs in Quantum Field Theory” has been held
at Weimar, Germany, from April 27 to May 02, 2014. It has been the 12th conference of this
series, started in 1992. The main focus of the conference are precision calculations of multi-
loop and multi-leg processes in elementary particle physics for processes at present and future
high-energy facilities within and beyond the Standard Model. At present many physics questions
studied deal with processes at the LHC and future facilities like the ILC. A growing number of
contributions deals with important developments in the field of computational technologies and
algorithmic methods, including large-scale computer algebra, efficient methods to compute large
numbers of Feynman diagrams, analytic summation and integration methods of various kinds, new
related function spaces, precise numerical methods and Monte Carlo simulations.
The present conference has been attended by more than 110 participants from all over the
world, presenting more than 75 contributions, most of which have been written up for these pro-
ceedings. The present volume demonstrates in an impressive way the enormous development of
the field during the last few years, reaching the level of 5-loop calculations in QCD and a like-
wise impressive development in massive next-to-leading order and next-to-next-to-leading order
processes. Computer algebraic and numerical calculations require terabyte storage and many CPU
years, even after intense parallelization, to obtain state-of-the-art theoretical predictions.
The city of Weimar gave a suitable frame to the conference, with its rich history, especially
in literature, music, arts, and architecture. Goethe, Schiller, Wieland, Herder, Bach and Liszt lived
there and created many of their masterpieces. The many young participants signal that our field is
prosperous and faces an exciting future.
The conference hotel “Kaiserin Augusta” offered a warm hospitality and excellent working
conditions.
We would like to thank Martina Mende for all her work in helping to organize this conference.
Details of the conference can be found under:
https://indico.desy.de/conferenceDisplay.py?confId=8107
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Sessions |
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Plenary 1 |

Plenary 2 |

Parallel 1 |

Parallel 2 |

Parallel 3 |

Parallel 4 |

Plenary 3 |

Parallel 5 |

Parallel 6 |

Parallel 7 |

Parallel 8 |

Plenary 4 |

Plenary 1 |

Preface PoS(LL2014)081 pdf |

Second order QCD corrections to gluonic jet production at hadron colliders PoS(LL2014)001 pdf |

Towards differential top-anti-top production at NNLO PoS(LL2014)002 pdf |

Two-loop corrections to top anti-top and ZZ/WW production PoS(LL2014)003 pdf |

Magnus and Dyson Series for Master Integrals PoS(LL2014)007 pdf |

Towards Higgs production at N3LO PoS(LL2014)028 pdf |

Plenary 2 |

Bounding the Higgs width at the LHC PoS(LL2014)008 pdf |

NLO corrections to Z production in association with several jets PoS(LL2014)009 pdf |

Multi-loop integrand reduction techniques PoS(LL2014)010 pdf |

Universality in W+Multijet Production PoS(LL2014)011 pdf |

Improving Higgs predictions with resummation PoS(LL2014)012 pdf |

Parallel 1 |

Three-loop beta function for the Higgs self-coupling PoS(LL2014)014 pdf |

3-Loop Heavy Flavor Corrections in Deep-Inelastic Scattering with Two Heavy Quark Lines PoS(LL2014)015 pdf |

The nf terms of the three-loop cusp anomalous dimension in QCD PoS(LL2014)016 pdf |

Recent Symbolic Summation Methods to Solve Coupled Systems of Differential and Difference Equations PoS(LL2014)017 pdf |

Evaluating multiloop Feynman integrals by differential equations PoS(LL2014)018 pdf |

The package HarmonicSums: Computer Algebra and Analytic Aspects of Nested Sums PoS(LL2014)019 pdf |

Nested (inverse) binomial sums and new iterated integrals for massive Feynman diagrams PoS(LL2014)020 pdf |

Four-dimensional formulation of the sector improved residue subtraction PoS(LL2014)004 pdf |

Parallel 2 |

Automated one-loop calculations with GoSam 2.0 PoS(LL2014)021 pdf |

Next-to-leading order simulations with Sherpa+OpenLoops PoS(LL2014)022 pdf |

Automatizing one-loop computation in the SM with RECOLA PoS(LL2014)023 pdf |

Beyond the t-channel Approximation: Next-to-Leading Order QCD Corrections to Electroweak Higgs Boson Production Plus Three Jets Production at the LHC PoS(LL2014)025 pdf |

A unified NLO description of top-pair and associated Wt production PoS(LL2014)026 pdf |

Vector boson pair production at NNLO PoS(LL2014)027 pdf |

Parallel 3 |

Next-to-Next-to-Leading Order QCD Corrections to Higgs Boson Pair Production PoS(LL2014)029 pdf |

Mass-corrections to double-Higgs production & TopoID PoS(LL2014)030 pdf |

Precision tools for Higgs physics PoS(LL2014)031 pdf |

Fully Automated Calculations in the Complex MSSM PoS(LL2014)080 pdf |

Higher-order contributions in Higgs sectors of supersymmetric models PoS(LL2014)032 pdf |

Momentum Dependent Two-Loop Corrections to the Neutral Higgs Boson Masses in the MSSM PoS(LL2014)033 pdf |

Parallel 4 |

GRACE for ILC PoS(LL2014)034 pdf |

New Developments in FormCalc 8.4 PoS(LL2014)035 pdf |

New applications of CARLOMAT PoS(LL2014)036 pdf |

Non-leptonic B-decays at two-loops in QCD PoS(LL2014)037 pdf |

Recent progress in higher order computations for the physics of the Higgs boson PoS(LL2014)038 pdf |

Summing Large-N Towers in Colour Flow Evolution PoS(LL2014)039 pdf attachments |

Plenary 3 |

A calculation of the three-loop helicity-dependent splitting functions in QCD PoS(LL2014)040 pdf |

Recent progress on the calculation of three-loop heavy flavor Wilson coefficients in Deep-Inelastic Scattering PoS(LL2014)041 pdf |

B_s -\rightarrow mu^+ mu^- and Bbar -\rightarrow X_s ganna to NNLO PoS(LL2014)042 pdf |

O(alpha_s alpha) corrections to Drell-Yan processes in the resonance region PoS(LL2014)045 pdf |

One-loop Single Real Emission Contributions to Inclusive Higgs Production at NNNLO PoS(LL2014)046 pdf |

Parallel 5 |

What can we learn from Knizhnik-Zamolodchikov Equations? PoS(LL2014)047 pdf |

QCD evolution equations from conformal symmetry PoS(LL2014)048 pdf |

Feynman integrals via hyperlogarithms PoS(LL2014)049 pdf |

Electroweak precision tests in the LHC era and beyond PoS(LL2014)050 pdf |

Higher-order hadronic and heavy-lepton contributions to the anomalous magnetic moment PoS(LL2014)051 pdf |

Non-planar Feynman integrals, Mellin-Barnes representations, multiple sums PoS(LL2014)052 pdf |

Schouten identities and the two-loop sunrise graph PoS(LL2014)053 pdf |

Parallel 6 |

Determination of the top quark mass PoS(LL2014)054 pdf |

NNLO antenna subtraction for heavy quark pair production PoS(LL2014)055 pdf |

Bottom Quark Mass from $\Upsilon$ Sum Rules to $\cal O(\alpha_{s}^{3})$ PoS(LL2014)056 pdf |

Helicity amplitudes with off-shell partons PoS(LL2014)057 pdf |

Electroweak corrections to hadronic Z + 2 jets production PoS(LL2014)058 pdf |

The new PV prescription for IR singularities of NLO splitting functions PoS(LL2014)059 pdf |

Higher-order soft and Coulomb corrections to squark and gluino production at the LHC PoS(LL2014)060 pdf |

Parallel 7 |

Two loop structure of QCD vertices PoS(LL2014)061 pdf |

Transverse-momentum resummation and the structure of hard factors at the NNLO PoS(LL2014)062 pdf |

Color decomposition of multi-quark one-loop QCD amplitudes PoS(LL2014)063 pdf |

High multiplicity processes with BlackHat and Sherpa PoS(LL2014)079 pdf |

Higher-order QCD corrections to associated VH production with $H \rightarrow b \bar b$ decay at the LHC PoS(LL2014)064 pdf |

Resummed Higgs pT distribution at NNLO+NNLL in bottom-quark annihilation PoS(LL2014)065 pdf |

Parallel 8 |

The loop-tree duality at work PoS(LL2014)066 pdf |

Two-loop corrections to (g-2) muon in SM and MSSM PoS(LL2014)067 pdf |

Quark and gluon spin-2 form factors to two loops in QCD PoS(LL2014)068 pdf |

Infrared singularities in multi-leg scattering amplitudes PoS(LL2014)069 pdf |

Recent new methods and applications of the differential equation approach to master integrals PoS(LL2014)070 pdf |

COLLIER – A fortran-library for one-loop integrals PoS(LL2014)071 pdf |

Plenary 4 |

Bounding the Higgs Width Using Effective Field Theory PoS(LL2014)072 pdf |

Progress on the infrared structure of multi-particle gauge theory amplitudes PoS(LL2014)073 pdf |

Testing Quantum Electrodynamics with Positronium State PoS(LL2014)074 pdf |

Xtreme manipulations PoS(LL2014)075 pdf |

Two-loop results on the renormalization of vacuum expectation values, infrared divergences in the FDH scheme PoS(LL2014)076 pdf |

Bootstrapping six-gluon scattering in planar N=4 super-Yang-Mills theory PoS(LL2014)077 pdf |

Algebraic geometry informs perturbative quantum field theory PoS(LL2014)078 pdf |