Relativistic effects and angular dependence in the reaction p̄p→π-π+

B. El-Bennich, W. M. Kloet

Research output: Contribution to journalArticlepeer-review

5 Scopus citations


We present a fit to the low energy antiproton ring at CERN data p̄p→π-π+ differential cross sections and analyzing powers motivated by relativistic considerations. Within a quark model describing this annihilation, we argue, since the pions are highly energetic, that relativistic effects cannot be neglected. The intrinsic pion wave functions are Lorentz transformed to the center-of-mass frame. This change in quark geometry gives rise to additional angular dependence in the transition operators and results in a relative enhancement of higher J≥2 partial wave amplitudes. The fit to the data is improved significantly.

Original languageEnglish (US)
Article number034002
Pages (from-to)340021-340025
Number of pages5
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - Sep 2004

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics

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