## Abstract

We calculate the response of the microscopic Dirac spectrum to an imaginary isospin chemical potential for QCD with two dynamical flavors in the chiral limit. This extends our previous calculation from the quenched to the unquenched theory. The resulting spectral correlation function in the ε-regime provides here, too, a new and efficient way to measure F

_{π}on the lattice. We test the method in a hybrid Monte Carlo simulation of the theory with two staggered quarks.Original language | English |
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Pages (from-to) | 74023 - 1 |

Journal | Physical review D |

Volume | 73 |

Issue number | 7 |

DOIs | |

State | Published - 2006 |

## Keywords

- chiral symmetries
- flavour model
- isotopic spin (elementary particles)
- lattice field theory
- Monte Carlo methods
- pion decay
- quantum chromodynamics

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