Quantum Chromodynamics at High Energies and String Theory

Project Information

QCDHEST

Grant agreement ID: 25897

Project closed

Start date 1 March 2006

End date 28 February 2009

Funded under

• Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006

Total cost No data

EU contribution € 360 100,00

Coordinated by

THE UNIVERSITAT HAMBURG
Germany

Objective

The Balitsky-Fadin-Kuraev-Lipatov (BFKL) formalism allowed giving a theoretical description of scattering amplitudes in the Regge limit of high energies and fixed momentum transfers in the framework of the theory of strong interactions, quantum chromodynamics (QCD).

Deep mathematical properties emerged in this way in the leading logarithmic approximation (LLA) for multi-colour QCD: conformal invariance, holomorphicfactorisation and integrability (Lipatov, 1986-1993). Moreover, in N=4 super-symmetric QCD these properties may hold in the next-to-leading approximation (NLLA) too. In such model, the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi evolution equations for quasi-partonic operators are integrable in LLA (Lipatov, 1997) and possibly also in NLLA. We think that these remarkable features are related to the fact that N=4 super-symmetric QCD is dual to super-string theory according to the AdS/CFT correspondence.

We shall study in this project the relation between the integrability of evolution equations for high energy processes in gauge field theories and super-string theories paving the way to go beyond the traditional perturbation theory at least for N=4 super-symmetric QCD. The effective action constructed for gauge theories in the Reggelimit (Lipatov, 1995) will be investigated in QCD and in its super-symmetric generalisations to calculate next-to-next-to-leading corrections to the Regge trajectories and their couplings. The Reggeon field theory in QCD, derived in this way, will give a possibility to solve a long-standing problem of the unitarisation of the QCD pomeron. This is important for understanding the physics of quark-gluon matter created in the ultra-relativistic heavy ion collisions performed in BNL and CERN.

Fields of science (EuroSciVoc)

CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques.

• natural sciences › physical sciences › theoretical physics › particle physics
• natural sciences › physical sciences › theoretical physics › string theory

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Keywords

• Quantum Chromodynamics

Programme(s)

• FP6-MOBILITY - Human resources and Mobility in the specific programme for research, technological development and demonstration "Structuring the European Research Area" under the Sixth Framework Programme 2002-2006

Topic(s)

• MOBILITY-3.3 - Marie Curie Chairs (EXC)

Call for proposal

FP6-2004-MOBILITY-10
See other projects for this call

Funding Scheme

EXC - Marie Curie actions-Chairs

Coordinator

THE UNIVERSITAT HAMBURG

• EU contribution: No data
• Address: Edmund-Siemers-Allee 1 ; HAMBURG ; Germany
• Total cost: No data