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New results on direct CP violation in charged kaon decays by NA48/2
This result based on more than $45\cdot10^6$ events, correspondig to one half of the whole two year data taking, is about an order of magnitude more precise with respect to the previous measurement.
| Autor principal: | |
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| Lenguaje: | eng |
| Publicado: |
2006
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| Acceso en línea: | http://cds.cern.ch/record/950253 |
| _version_ | 1780909961689169920 |
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| author | Lamanna, G. |
| author_facet | Lamanna, G. |
| author_sort | Lamanna, G. |
| collection | CERN |
| description | This result based on more than $45\cdot10^6$ events, correspondig to one half of the whole two year data taking, is about an order of magnitude more precise with respect to the previous measurement. |
| id | cern-950253 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 2006 |
| record_format | invenio |
| spelling | cern-9502532023-03-14T18:10:31Zhttp://cds.cern.ch/record/950253engLamanna, G.New results on direct CP violation in charged kaon decays by NA48/2Particle Physics - ExperimentThis result based on more than $45\cdot10^6$ events, correspondig to one half of the whole two year data taking, is about an order of magnitude more precise with respect to the previous measurement.The NA48/2 result, based on the data collected during the 2003 run, on direct CP violation in $K^{\pm}\to\pi^{\pm}\pi^0\pi^0$ decay is presented. The main goal of the experiment is to reach a sensitivity at level of $10^{-4}$ in the measurement of the charge asymmetry parameter $A_g=(g^+-g^-)/(g^++g^-)$, where $g$ is the \emph{linear slope} of the Dalitz plot in the $K\to 3\pi$ decay. Thanks to the simultaneous collection of the two kaon charges and to the high resolution of the main sub-detectors, the systematics uncertainties are kept under the statistical error level. The experimental procedure, the analysis technique and the main systematics are discussed to present the final result $$ A_g=(1.8\pm2.6)\times 10^{-4} $$ This result based on more than $45\cdot10^6$ events, correspondig to one half of the whole two year data taking, is about an order of magnitude more precise with respect to the previous measurement.hep-ex/0605052oai:cds.cern.ch:9502532006-05-15 |
| spellingShingle | Particle Physics - Experiment Lamanna, G. New results on direct CP violation in charged kaon decays by NA48/2 |
| title | New results on direct CP violation in charged kaon decays by NA48/2 |
| title_full | New results on direct CP violation in charged kaon decays by NA48/2 |
| title_fullStr | New results on direct CP violation in charged kaon decays by NA48/2 |
| title_full_unstemmed | New results on direct CP violation in charged kaon decays by NA48/2 |
| title_short | New results on direct CP violation in charged kaon decays by NA48/2 |
| title_sort | new results on direct cp violation in charged kaon decays by na48/2 |
| topic | Particle Physics - Experiment |
| url | http://cds.cern.ch/record/950253 |
| work_keys_str_mv | AT lamannag newresultsondirectcpviolationinchargedkaondecaysbyna482 |