Charge “asymmetry” from the isospin symmetry in \(pp\to pp\pi^ + \pi^-\)

  • I. SeluzhenkovEmail author
  • M. Schepkin
  • H. Clement


Charge “asymmetry” meant as \(\sigma_{ + -} = {\mathrm d} \sigma/{\mathrm d} M_{p\pi^ + }- {\mathrm d} \sigma/{\mathrm d} M_{p\pi^-}\) is easy to reproduce by the simple-minded reaction mechanism, which stems on the interference of \(\Delta^{ + + }\) and \(\Delta^{0}\) excited in one of the colliding protons. High-quality experimental data for the \(pp\to pp\pi^ + \pi^-\) reaction taken at CELSIUS storage ring with the PROMICE/WASA detector can be described by the Lorentz-invariant phenomenological approach. The same approach is applied for the description of the asymmetry between \(M_{pp\pi^ + }\) and \(M_{pp\pi^-}\) invariant-mass spectra.


Experimental Data Reaction Mechanism Storage Ring Phenomenological Approach Isospin Symmetry 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  1. 1.Institute of Theoretical and Experimental PhysicsMoscowRussia
  2. 2.Physikalisches Institut der Universität TübingenTübingenGermany

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