Abstract

With the amplitudes obtained in the effective lagrangian (BL) and in the dispersion (BDW) methods the new data for the (γ, π 0) reaction on the proton near threshold are analysed. The inclusion of ω 0-meson exchange in the BDW amplitude removes the discrepancy with experimental data. The tensor and vector coupling constants which are consistent with the results of other analyses give the value of E 0+ multipole predicted by the PCAC hypothesis.

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 call

Disclaimer: 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.