A New Dispersive Analysis of η → 3 π

نویسندگان

  • Gilberto Colangelo
  • Stefan Lanz
  • Emilie Passemar
چکیده

We present a new dispersive analysis of the isospin breaking decay η → 3π. The resulting representation of the decay amplitude allows us to determine the quark mass double ratio Q and we find as a preliminary result Q = 22.3 ± 0.4. Finally, we discuss a number of improvements that we intend to implement in the future.

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تاریخ انتشار 2009