D. A. Stoyanova

Measurements of the charge asymmetry of the Dalitz plot parameters for \(K^{\pm}\to\pi^{\pm}\pi^0\pi^0\) decays

Abstract.The charge asymmetry of the g, h, and k Dalitz plot parameters for

Measurements of the Dalitz plot parameters for K± → π±π0π0 decays

{K^{pm}rightarrow pi^{pm} pi^{0} pi^{0}}

Study of K± → e±νπ0 decays at the KMN setup

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

Measurement of the charge asymmetry of the Dalitz plot parameters for K ± → π ± π 0 π 0 decays

K^{pm}

Measurement of the Charge Asymmetry of the Dalitz Plot Parameters for K{sup {+-}} {yields} {pi}{sup {+-}}{pi}{sup 0}{pi}{sup 0} Decays

decays within the errors quoted. In particular, the charge asymmetry Ag = (g + – g-)/(g + + g-) of the slope g is equal to

Measurement of the charge asymmetry of the Dalitz plot parameters for K± → π±π0π0 decays

{(0.2 pm 1.9)cdot 10^{-3}}

Study of K{sup {+-} }e{sup {+-}0} decays at the KMN setup

.

Measurement of the Charge Asymmetry of the Dalitz Plot Parameters for K{sup {+-}} â Ï{sup {+-}}Ï°Ï° Decays

The g, h, and k Dalitz plot parameters, which are coefficients in a series expansion of the squared module of the matrix element |M(u, v)|2 ∝ 1 + gu + hu2 + kv2 (u, v are invariant variables), have been measured for K± → π±π 0π0 decays using 35 GeV/c hadron beams at the IHEP (Protvino) accelerator. Dependences of parameters and fit quality on the π0π0 mass cut were investigated for the first time. It is shown that the expansion mentioned above does not fit the experimental data near the π+π− mass threshold and that addition of the cubic terms only slightly improves the fit quality. This result indicates the important role of nonanalytical terms in the matrix element that are connected with pion rescattering. A comparison of our data with previous measurements is presented.

G.A. Akopdzhanov, V.B. Anikeev, V.A. Bezzubov, S.P. Denisov, A.A. Durum, Yu.V. Gilitsky, V.M. Korablev,

K± → e±νπ0 decays have been studied using the KMN setup at the Institute for High Energy Physics (Protvino). The experiment has been performed in the 36-GeV/c hadron beams of the IHEP accelerator. The accumulated data allow us to select ∼1.08M candidates for Ke3 decays. Analyzing the Dalitz plot of these events, we estimate the linear slope of the charge form factor to be λ+ = [30.44 ± 0.83(stat.) ± 0.74(syst.)] × 10−3.

Measurements of the Dalitz plot parameters for K ? p p 0 p<su

The results are presented for the charge asymmetry of the Dalitz plot parameters g, h, and k measured for K± → π±π0π0 decays. The experiment has been carried out in the 35-GeV/c kaon beams at the IHEP accelerator. The g, h, and k parameters appear to be identical for K+ and K− decays within the experimental uncertainty. In particular, a value of (0.2 ± 1.9) × 10−3 is obtained for the charge asymmetry Ag = (g+ − g−)/(g+ + g−) of the Dalitz plot slope.