Recent results from NA48/2

Cristina Morales; on behalf; the NA

doi:10.1088/1674-1137/34/6/023

Chinese Physics C> 2010, Vol. 34> Issue(6) : 749-752 DOI: 10.1088/1674-1137/34/6/023

Recent results from NA48/2

Institut für Physik, Universität Mainz, Germany

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Abstract：
Recent results on radiative K^± decays from the NA48/2 experiment are reported. From the full NA48/2 data set, about a million K^±→π^±π⁰γ decays were reconstructed. Based on this sample, the first measurement of the interference between direct photon emission and inner bremsstrahlung in K^±→π^±π⁰γ decays was performed. Stringent limits on CP violation in this decay were also set. In addition, a precise measurement of the branching fraction of K^±→π^±γγ is presented. This measurement was based on a data sample of more than 1000 event candidates. Also the related decay K^±→π^±π⁰e⁺e^－γ has first been observed. Results of the measurement of the decay rate and the decay parameter c are summarized.

References

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Cristina Morales, on behalf and the NA. Recent results from NA48/2[J]. Chinese Physics C, 2010, 34(6): 749-752. doi: 10.1088/1674-1137/34/6/023

Cristina Morales, on behalf and the NA. Recent results from NA48/2[J]. Chinese Physics C, 2010, 34(6): 749-752. doi: 10.1088/1674-1137/34/6/023 shu

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Received: 2010-01-25
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Corresponding author: Cristina Morales,

Institut für Physik, Universität Mainz, Germany

Received Date: 2010-01-25

Accepted Date: 1900-01-01

Available Online: 2010-06-05

Abstract:

Recent results on radiative K^± decays from the NA48/2 experiment are reported. From the full NA48/2 data set, about a million K^±→π^±π⁰γ decays were reconstructed. Based on this sample, the first measurement of the interference between direct photon emission and inner bremsstrahlung in K^±→π^±π⁰γ decays was performed. Stringent limits on CP violation in this decay were also set. In addition, a precise measurement of the branching fraction of K^±→π^±γγ is presented. This measurement was based on a data sample of more than 1000 event candidates. Also the related decay K^±→π^±π⁰e⁺e^－γ has first been observed. Results of the measurement of the decay rate and the decay parameter c are summarized.

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