Current algebra calculation of e+e- → π+π-π+π- cross section and properties of hadronic axial vector current
1978; Elsevier BV; Volume: 80; Issue: 1-2 Linguagem: Inglês
10.1016/0370-2693(78)90322-2
ISSN1873-2445
AutoresT. N. Pham, C. Roiesnel, Tran N. Troung,
Tópico(s)High-Energy Particle Collisions Research
ResumoNaive application of the soft pion theorem to e+e- → 4π+- 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 A1 dominance for the hadronic axial vector current. This effect should be present in τ→3πυ decay.
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