The k-th Smallest Dirac Operator Eigenvalue and the Pion Decay Constant
Oct, 2011Citations per year
Abstract: (arXiv)
We derive an analytical expression for the distribution of the k-th smallest Dirac eigenvalue in QCD with imaginary isospin chemical potential in the Dirac operator. Because of its dependence on the pion decay constant F through the chemical potential in the epsilon-regime of chiral perturbation theory this can be used for lattice determinations of that low-energy constant. On the technical side we use a chiral Random-Two Matrix Theory, where we express the k-th eigenvalue distribution through the joint probability of the ordered k smallest eigenvalues. The latter can be computed exactly for finite and infinite N, for which we derive generalisations of Dyson's integration Theorem and Sonine's identity.Note:
- 27 pages, 5 figures; v2: typos corrected, published version
- potential: chemical
- pi: decay constant
- operator: Dirac
- perturbation theory: chiral
- matrix model: random
- low-energy constant
- density: spectral
- scaling
- quenching
- spontaneous symmetry breaking: chiral
References(42)
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