Objective
The LHC era of fundamental physics presents a formidable challenge for theorists - the precision of Standard Model predictions should be improved by a factor of two. One of the major bottlenecks is the availability of two-loop scattering amplitudes in quantum chromodynamics (QCD), which is largely limited to 2 -> 2 processes due to the daunting complexity of the perturbative series. The need for amplitudes of higher-multiplicity processes calls for new analytic insights into the intricate structure of gauge theories.
This project centers around one such insight - colour-kinematics duality - and aims to convert it into a powerful ally for future QCD calculations. This will be possible because the duality, recently generalised from the purely gluonic sector to full QCD, contains valuable information about non-Abelian gauge theories. In particular, it relates aspects of QCD calculations that are simpler to aspects, which are thought to be much harder. This input non-trivially constrains the S-matrix and thus can be used to reduce the number of subcalculations needed. To achieve this, we plan to pursue the four following lines of research:
- systematise the relations among generalised unitarity cuts, which follow from tree-level amplitude relations induced by the duality of colour and kinematics;
- simplify the analytic structure of loop integrands via smart loop momentum parametrisation;
- develop tools for tree-level amplitudes in six-dimensional gauge theories, which serve as input for dimensionally-regulated two-loop amplitudes in four dimensions;
- calculate previously inaccessible two-loop amplitudes contributing to NNLO corrections to 2 -> 3 QCD processes at the LHC.
This will improve our understanding of gauge theories and open the way to previously intractable calculations of higher-loop scattering amplitudes, such as the next-to-next-to-leading-order amplitude for 2 -> 3 parton scattering, thus making a major impact on the field of perturbative QCD.
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. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences physical sciences theoretical physics particle physics particle accelerator
- natural sciences physical sciences relativistic mechanics
- natural sciences physical sciences theoretical physics particle physics gluons
- natural sciences physical sciences astronomy astrophysics black holes
- natural sciences physical sciences theoretical physics particle physics quarks
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions
MAIN PROGRAMME
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H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
MSCA-IF-EF-ST - Standard EF
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) H2020-MSCA-IF-2016
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
8092 Zuerich
Switzerland
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.