Search for direct CP violating charge asymmetries in $K^{\pm }\to {\pi }^{\pm }{\pi }^{+}{\pi }^{-}$ and $K^{\pm }\to {\pi }^{\pm }{\pi }^0{\pi }^0$ decays

Abstract

A measurement of the direct CP violating charge asymmetries of the Dalitz plot linear slopes $A_g=(g^{+}-g^{-})/(g^{+}+g^{-})$ in $K^{\pm }\to {\pi }^{\pm }{\pi }^{+}{\pi }^{-}$ and $K^{\pm }\to {\pi }^{\pm }{\pi }^0{\pi }^0$ decays by the NA48/2 experiment at CERN SPS is presented. A new technique of asymmetry measurement involving simultaneous $K^{+}$ and $K^{-}$ beams and a large data sample collected allowed a result of an unprecedented precision. The charge asymmetries were measured to be $A_g^c=(-1.5\pm 2.2)\times 10^{-4}$ with $3.11\times 10^9$ $K^{\pm }\to {\pi }^{\pm }{\pi }^{+}{\pi }^{-}$ decays, and $A_g^n=(1.8\pm 1.8)\times 10^{-4}$ with $9.13\times 10^7$ $K^{\pm }\to {\pi }^{\pm }{\pi }^0{\pi }^0$ decays. The precision of the results is limited mainly by the size of the data sample.

arXiv comment29 pages, 9 figures. An updated version accepted by the EPJC

References in corpus (23)

• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• Observation of Large CP Violation in the Neutral B Meson System
• Observation of CP violation in the B^0 meson system
• Observation of Direct CP Violation in K_{S,L} to ππDecays
• A new measurement of direct CP violation in two pion decays of the neutral kaon
• A precision measurement of direct CP violation in the decay of neutral kaons into two pions
• Dijet Cross Sections and Parton Densities in Diffractive DIS at HERA
• Direct CP Violating Asymmetry in B0 -> K+pi- Decays
• Measurements of Direct CP Violation, CPT Symmetry, and Other Parameters in the Neutral Kaon System
• Hadronic scattering amplitudes: medium-energy constraints on asymptotic behaviour
• Cusps in K --> 3 pi decays
• A precise measurement of the direct CP violation parameter Re(epsilon'/epsilon)
• Determination of the a0-a2 pion scattering length from K->pi+ pi0 pi0 decay
• Pion-pion scattering and the K->3pi decay amplitudes
• Observation of a cusp-like structure in the pizero-pizero invariant mass distribution from K+- ==> pi+- pizero pizero decay and determination of the pi-pi scattering lengths
• Observation of Large CP Violation and Evidence for Direct CP Violation in B0-->pi+pi- Decays
• Search for the K(L) --> PI0 PI0 E+ E- Decay in the KTeV Experiment
• Direct CP violation in K->3pi decays induced by SUSY chromomagnetic penguins
• Charged Kaon K \to 3 pi CP Violating Asymmetries at NLO in CHPT
• Search for direct CP violation in the decays K\pm \to 3π\pm
• Measurements of the Charge Asymmetry of the Dalitz Plot Parameters for $K^{\pm }\to {\pi }^{\pm }{\pi }^0{\pi }^0$ Decays
• Search for direct CP-violation in K+- --> pi+-pi0pi0 decays

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