Measurements of the Charge Asymmetry of the Dalitz Plot Parameters for $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ Decays

TL;DR

This study measures the charge asymmetry in Dalitz plot parameters for charged kaon decays, finding no significant asymmetry within experimental errors, thus testing CP violation effects.

Contribution

It provides the first precise measurement of charge asymmetry in Dalitz plot parameters for $K^{\pm} o\pi^{\pm}\pi^0\pi^0$ decays, with results consistent with no asymmetry.

Findings

Charge asymmetry $A_g$ measured as $(0.2 \pm ext{1.9}) imes 10^{-3}$.

Dalitz plot parameters for $K^{\pm}$ decays are consistent within errors.

No significant charge asymmetry observed in the decay parameters.

Abstract

The charge asymmetry of the g, h, and k Dalitz plot parameters for $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ decays has been measured with 35 GeV/c hadron beams at the 70 GeV IHEP accelerator. The g, h and k values obtained appear to be identical for $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ decays within the errors quoted. In particular, the charge asymmetry $A_g = (g^+ - g^-)/(g^+ + g^-)$ of the slope g is equal to $(0.2 \pm 1.9)\cdot 10^{-3}$.