## Contact

Swiss National Science Foundation (SNSF)

Wildhainweg 3P.O. Box

CH-3001 Bern

Phone +41 31 308 22 22

Applicant | Anastasiou Charalampos |
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Number | 143781 |

Funding scheme | Project funding (Div. I-III) |

Research institution | Institut für Theoretische Physik ETH Zürich |

Institution of higher education | ETH Zurich - ETHZ |

Main discipline | Theoretical Physics |

Start/End | 01.10.2012 - 30.09.2015 |

Approved amount | 425'357.00 |

Discipline |
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Theoretical Physics |

Particle Physics |

Quantum Chromodynamics; Higgs boson physics; Perturbative Calculations; Theory of Elementary Particles

Lead |
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Lay summary |

The LHC has made one of the greatest discoveries in particles physics. The Higgs boson will be at the epicenter of the LHC experiments for the next decade with the purpose of measuring as precisely as possible the strengths of its interactions with known particles as well as with yet to be discovered unknown particles. The aim of this project is to improve the theoretical precision for the production rate of the Higgs particle. This is the an important theoretical input for the studies of Higgs boson interactions with a dominant uncertainty. In the course of this project we shall develop new computational methods in perturbative QCD and we shall apply our new techniques to improve the theoretical precision of the production rates of electroweak gauge bosons as well. |

Direct link to Lay Summary | Last update: 21.02.2013 |

Name | Institute |
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Publication |
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A naturally light Higgs without light Top Partners |

Higgs boson gluon-fusion production beyond threshold in N$^{3}$LO QCD |

Higgs Boson Gluon-Fusion Production in QCD at Three Loops |

Higgs boson pair production in the D=6 extension of the SM |

NNLO QCD corrections to pp → γ$^{*}$ γ$^{*}$ in the large N$_F$ limit |

Soft expansion of double-real-virtual corrections to Higgs production at N$^{3}$LO |

An explicit Z'-boson explanation of the $B \to K^* μ^+ μ^-$ anomaly |

Higgs boson gluon–fusion production at threshold in N$^3$LO QCD |

Indirect Handle on the Down-Quark Yukawa Coupling |

On minimal $Z'$ explanations of the $B\to K^*μ^+μ^-$ anomaly |

Composite Taus and Higgs Decays |

Custodial Leptons and Higgs Decays |

Real-virtual contributions to the inclusive Higgs cross-section at $N^3LO$ |

Soft triple-real radiation for Higgs production at N3LO |

Group / person | Country |
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Types of collaboration |
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University of Durham | Great Britain and Northern Ireland (Europe) |

- in-depth/constructive exchanges on approaches, methods or results |

University of Zurich | Switzerland (Europe) |

- in-depth/constructive exchanges on approaches, methods or results - Publication |

ETHZ | Switzerland (Europe) |

- in-depth/constructive exchanges on approaches, methods or results |

Title | Year |
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ETH medal | 2015 |

Number | Title | Start | Funding scheme |
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126632 | Perturbative computations in gauge theories for collider experiments | 01.10.2009 | Project funding (Div. I-III) |

The aim of this project is to add one more term in the QCD perturbative expansion in the theoretical predictions for Higgs boson and Drell-Yan production at the LHC. The last complete perturbative order (NNLO) for the Higgs boson total cross-section was calculated a decade ago. Fully differential cross-sections were also computed recently. The precision of these calculations has been of the order of 10%-20% depending on the experimental observable. The uncertainty in Higgs production cross-sections is the main theoretical uncertainty for Higgs coupling extractions. We believe that it is now feasible to compute one order higher in the perturbative expansion and reduce this uncertainty further. A computation at NNNLO is a formidable task challenging the limits of our computational capabilities and it will be a unique achievement upon its completion. The same techniques that we shall develop for Higgs production can be used for the Drell-Yan cross-section. This is currently known at NNLO accuracy with an estimated perturbative uncertainty of 1-2% at the LHC for current lepton trigger configurations. At a higher luminosity where triggering only on leptons of higher transverse momentum is required the estimated accuracy of the NNLO prediction drops to 8%. A NNNLO computation will maintain a precision of below 1-2% for all triggering conditions. We believe that the challenging character of this project will stimulate numerous technical advances and progress in the field of higher order perturbative computations in quantum field theory.

Swiss National Science Foundation (SNSF)

Wildhainweg 3P.O. Box

CH-3001 Bern

Phone +41 31 308 22 22

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