Abstract
Naive application of the soft pion theorem to e +e - → 4 π +- in the 1−1.4 GeV region gives a cross section too small by a factor 10–15 compared with experiments. Agreement is obtained only when the soft pion result is modified by the A 1 dominance for the hadronic axial vector current. This effect should be present in τ→3πυ decay.
Sign-in/Register to access full text options 
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.
