# First result on the measurement of direct CP-violating parameter A0g in K± -> π± π0 &pi

- Institution: CERN
- Department: CERN Particle Physics Seminar,2000-2009
- Taught by: Spasimir Balev, Rolf Landua
- Year: 2005
- Language: English
- Subjects: Physics
- Source: [CERN](https://videos.cern.ch/record/3011140)
- Licence: [CERN](http://copyright.web.cern.ch)
- Who can watch: Tweens profiles and older (sources give no ratings; placed by Invisible Network from the source's own words)

An asymmetry A0g = (g+ - g-)/(g+ - g-), where g+ and g- are the Dalitz plot slope parameters for K+ and K- decays into three pions, respectively, is a measure of a direct CP-violation in corresponding decays. This asymmetry has been measured using more than 40 millions of K± -> π± π0 π0 decays accumulated in 2003 run at CERN SPS with a precision, which is almost one order of magnitude better than in other experiments..

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## Lectures

1. [First result on the measurement of direct CP-violating parameter A0g in K± -> π± π0 &pi](https://invisiblenetwork.ai/learn/cern/3011140/e2bc2a926eb7), 59 min (CERN's player)