126 citations · 992 across the 32 of their papers we have counts for
6 papers · 1 filter
Neutral Pion Lifetime Measurements and the QCD Chiral Anomaly
A. M. Bernstein, Barry R. Holstein
A fundamental property of QCD is the presence of the chiral anomaly, which is the primary component of the decay amplitude. Based on this anomaly and its small (…
Energy Dependence of the Delta Resonance: Chiral Dynamics in Action
A. M. Bernstein, S. Stave
There is an important connection between the low energy theorems of QCD and the energy dependence of the Delta resonance in pi-N scattering, as well as the closely related gamma^{*…
Ovrview: The Shape of Hadrons
A. M. Bernstein, C. N. Papanicolas
In this article we address the physical basis of the deviation of hadron shapes from spherical symmetry (non-spherical amplitudes) with focus on the nucleon and . An overview of…
Opening Remarks at Chiral Dynamics 2006:Experimental Tests of Chiral Symmetry Breaking
A. M. Bernstein
A physical introduction to the basics of chiral dynamics is presented. Emphasis is placed on experimental tests which have generally demonstrated a strong confirmation of the predi…
The decay pi0 to gamma gamma to next to leading order in Chiral Perturbation Theory
J. L. Goity, A. M. Bernstein, B. R. Holstein
The two photon decay width of the neutral pion is analyzed within the combined framework of Chiral Perturbation Theory and the 1/Nc expansion up to order p^6 and p^4 times 1/Nc in…
Light Quark Mass Difference and Isospin Breaking In Electromagnetic Pion Production
A. M. Bernstein
It is demonstrated that there is a dynamic isospin breaking effect in the near threshold reaction due to the mass difference of the up and down quarks, which also c…