Experimental measurement of the \u3b3\u21923\u3c0 coupling constant
- Y. Antipov
- V. Batarin
- V. Bessubov
- N. Budanov
- Y. Gorin
- S. Denisov
- S. Klimenko
- I. Kotov
- A. Lebedev
- A. Petrukhin
- S. Polovnikov
- D. Stoyanova
- Y. Gornushkin
- P. Kulinich
- G. Micelmacher
- A. Olshevski
- J. Sedlak
- V. Travkin
- R. Pirtzkhalava
- V. Roinishvili
- F. Palombo
DOIAbstract
We present the results of an experimental investigation of the production in the nuclear Coulomb field of low-invariant-mass pions pairs by the reaction -Z'-0Z at 40 GeV. We have obtained for the first time the experimental value of the '3 coupling constant F3(0)=13.0\ub10.9\ub11.3 GeV-3, where the first (second) error is statistical (systematic). This result is in agreement with calculations based on the theory of chiral anomalies
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