The Contribution of the Light Quark Condensate to the Pion-Nucleon Sigma Term
arXiv:nucl-th/0305022 · doi:10.1142/S0217732303010995
Abstract
There has been a discrepancy between values of the pion-nucleon sigma term extracted by two different methods for many years. Analysis of recent high precision pion-nucleon data has widened the gap between the two determinations. It is argued that the two extractions correspond to different quantities and that the difference between them can be understood and calculated.
Modern Physics Letters A (in press)