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Modern Methods for Perturbative Gauge Theories

Objective

Gauge theories are the basis of modern theories of high-energy physics. Perturbative calculations are crucial to developing our quantitative understanding of these theories, as well as seeking new and deeper structures in these theories. Precision higher-order calculations in the SU(3) component of the Standard Model, perturbative Quantum Chromodynamics (QCD), will be crucial to understanding data at the CERN-based Large Hadron Collider (LHC) and finding and measuring physics beyond the standard model. Precision calculations in the electroweak theory will also play a role in confronting later precision data with theoretical models. The related maximally (N=4) supersymmetric gauge theory has served both as an important theoretical laboratory for developing new calculational techniques, as well as a link to string theory via the AdS/CFT duality. It is also emerging as a fruitful meeting point for ideas and methods from three distinct areas of theoretical physics: perturbative gauge theories, integrable systems, and string theory. The Project covers three related areas of perturbative gauge theories: computation of one- and two-loop amplitudes in perturbative quantum chromodynamics; incorporation of these amplitudes and development of a fully-matched parton-shower formalism and numerical code; and higher-loop computations in the N=4 supersymmetric theory. It aims to develop a general-purpose numerical-analytic hybrid program for computing phenomenologically-relevant one- and two-loop amplitudes in perturbative QCD. It also aims to develop a new parton shower allowing complete matching to leading and next-to-leading order computations. It seeks to further develop on-shell computational methods, and apply them to the N=4 supersymmetric gauge theory, with the goal of connecting perturbative quantities to their strong-coupling counterparts computed using the dual string theory.

Field of science

  • /natural sciences/physical sciences/theoretical physics/particles/particle accelerator
  • /natural sciences/physical sciences/string theory
  • /natural sciences/physical sciences/theoretical physics

Call for proposal

ERC-2008-AdG
See other projects for this call

Funding Scheme

ERC-AG - ERC Advanced Grant

Host institution

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
Address
Rue Leblanc 25
75015 Paris 15
France
Activity type
Research Organisations
EU contribution
€ 961 080
Principal investigator
David A. Kosower (Dr.)
Administrative Contact
Jean-Christophe Coste (Mr.)

Beneficiaries (1)

COMMISSARIAT A L ENERGIE ATOMIQUE ET AUX ENERGIES ALTERNATIVES
France
EU contribution
€ 961 080
Address
Rue Leblanc 25
75015 Paris 15
Activity type
Research Organisations
Principal investigator
David A. Kosower (Dr.)
Administrative Contact
Jean-Christophe Coste (Mr.)