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Updated dispersion-theoretical analysis of the nucleon electromagnetic form factors
H. -W. Hammer, Ulf-G. Meißner
In the light of the new data on the various neutron and proton electromagnetic form factors taken in recent years, we update the dispersion-theoretical analysis of the nucleon elec…
Chiral Dynamics: Theory and Experiment (CD2003)
Ulf-G. Meißner, H. -W. Hammer, Andreas Wirzba
These are the proceedings of the fourth international workshop on "Chiral Dynamics: Theory and Experiment" which was held at the University of Bonn, September 8-13, 2003. The works…
An Infrared Renormalization Group Limit Cycle in QCD
Eric Braaten, H. -W. Hammer
We conjecture that QCD can be tuned to an infrared limit cycle in the three-nucleon system by adjusting the up and down quark masses to critical values at which the binding energie…
Universality in the physics of cold atoms with large scattering length
H. -W. Hammer
Effective field theories exploit a separation of scales in physical systems in order to perform systematically improvable, model-independent calculations. They are ideally suited t…
Narrow Resonances in Effective Field Theory
P. F. Bedaque, H. -W. Hammer, U. van Kolck
We discuss the power counting for effective field theories with narrow resonances near a two-body threshold. Close to threshold, the effective field theory is perturbative and only…
An Infrared Renormalization Group Limit Cycle in QCD
Eric Braaten, H. -W. Hammer
Small increases in the up and down quark masses of QCD would tune the theory to the critical renormalization group trajectory for an infrared limit cycle in the three-nucleon syste…