Abstract
A standard analysis of the pion-nucleon $\ensuremath{\sigma}$ term uses partial conservation of the axial-vector current, current algebra, and a seemingly benign quark-model assumption and disagrees with experiment by a factor of 2. Here I calculate the $\ensuremath{\sigma}$ term in a hybrid chiral bag model and find that the discrepancy disappears. Excepting the $\ensuremath{\sigma}$ term the (successful) pattern of SU(3)- and SU(3) \ifmmode\times\else\texttimes\fi{} SU(3)-symmetry violation in the model is essentially identical to the more standard analysis.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
