Ref HAL: hal-00377714_v1
Ref Arxiv: 0803.0696
DOI: 10.1016/j.nuclphysbps.2008.12.047
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
3 citations
Résumé:

C-odd asymmetry can be studied from an accurate measurement of the angulardistribution due to the interference between the S- and P-waves in e+e- --> pi+pi- at order alpha^3. The asymmetry is dominated by the pion rescatteringdiagram which is enhanced by the presence of the ln(s/m^2_e), and is quitelarge (10% at theta=30^0 and sqrt{s} < M_{f_2}) compared to alpha/pi=0.3%. Thisprocess can also be used for alternatively measuring the size of therescattering term and the phase of the S-wave amplitude, but does not help tosolve the present discrepancy between the hadronic spectral functions from e+e-and tau-decay data.

Commentaires: Proceedings of the QCD 08, 14th High-Energy Physics International Conference On Quantum ChromoDynamics