Objective
Quantum chromodynamics (QCD) has been validated through a large amount of experiments. However, since the theory has not been solved analytically, quantitative predictions of its low-energy phenomenology from first principles (a key element in the understanding of both the strong and the weak interactions) can be achieved only through the use of a lattice regularisation.
A recent breakthrough (based on the use of domain decomposition methods) in the field of simulation algorithms has opened the way to simulations with Wilson fermions at quark masses small enough to make contact with chiral perturbation theory, thus allowing controlled extrapolation of lattice results to the physical point.
The goal of this project is double.
- First the study of processes where small quark masses are crucial such as pion-pion scattering and its resonances. In this case the main difficulty (beyond the small masses and large volumes needed) comes from the fact that lattice field theories are defined in Euclidean space-time. This difficulty can be solved by adopting finite volume techniques, which allow the extraction of the pion-pion scattering phases in infinite volume from the two-pion energy spectrum in finite volume.
- Secondly, the study of problems where chiral symmetry (explicitly broken by the Wilson regularisation) is necessary, such as the Delta S=2 transition amplitudes (and the related kaon B-parameter B_K) which require the computation of the matrix elements of four fermion operators.
In this case we propose to investigate the use of valence Ginsparg-Wilson quarks (which respect chiral symmetry) on gauge configurations containing light Wilson sea quarks after that appropriate matching of the corresponding quark masses has been performed. One can thus compare simple quantities with those in the pure Wilson approach and finally compute B_K.
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 fermions
- 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.
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.
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.
FP6-2005-MOBILITY-5
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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.
Coordinator
GENEVA 23
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.