B. Borasoy

Chiral Expansion of Baryon Masses andσ-Terms

We analyze the octet baryon masses and the pion/kaon--nucleon

K- p scattering length from scattering experiments

\sigma

Chiral dynamics of kaon-nucleon interactions, revisited

--terms in the framework of heavy baryon chiral perturbation theory. We include {\it all} terms up-to-and-including quadratic order in the light quark masses,

Lattice simulations for light nuclei: Chiral effective field theory at leading order

m_q

Hadronic η and \eta{^\prime} decays

. We develop a consistent scheme to estimate low--energy constants related to scalar--isoscalar operators in the framework of resonance exchange involving one--loop graphs. The pertinent low--energy constants can only be estimated up to some finite coefficients. Including contributions from loop graphs with intermediate spin--3/2 decuplet and spin--1/2 octet states and from tree graphs including scalar mesons, we use the octet baryon masses and the pion--nucleon

A gauge-invariant chiral unitary framework for kaon photo- and electroproduction on the proton

\sigma

Two-particle scattering on the lattice : Phase shifts, spin-orbit coupling, and mixing angles

--term to fix all but one of these coefficients. Physical results are insensitive to this remaining parameter. It is also demonstrated that two--loop corrections only modify some of the subleading low--energy constants. We find for the baryon mass in the chiral limit,

Chiral effective field theory on the lattice at next-to-leading order

m_0 = 770 \pm 110

The triton and three-nucleon force in nuclear lattice simulations

MeV. While the corrections of order

Dilute neutron matter on the lattice at next-to-leading order in chiral effective field theory

m_q^2