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

[1]

. Batley J R et al. Eur. Phys. J. C, 2007, 52: 8752. Fanti V et al. Nucl. Instrum. Methods A, 2007, 574: 4333. Christ N. Phys. Rev., 1967, 159: 12924. D'Ambrosio G, Miragliuolo M, Santorelli P. The Daphne Physics Handbook, 19925. CHENG H Y, Lee S C, YU H L. Z. Phys. C, 1987, 41: 726. CHENG H Y. Phys. Rev. D, 1990, 44: 727. Ecker G, Pich A, de Rafael E. Nucl. Phys. B, 1988, 303:6658. Ecker G, Neufeld H, Pich A. Phys. Lett. B, 1992, 278: 3379. Ecker G, Neufeld H, Pich A. Phys. Lett. B, 1994, 413: 32110. Wess J, Zumino B. Phys. Lett. B, 1971, 37: 9511. Witten E. Nucl. Phys. B, 1983, 233: 42212. Amsler C et al. Phys. Lett. B, 2008, 667: 113. Adler S et al. Phys. Rev. Lett., 2000, 85: 485614. Gérard J M, Smith C, Trine S. Nucl. Phys. B, 2005, 730:115. D'Ambrosio G, Portolés J. Nucl. Phys. B, 1996, 386: 40316. Gabbiani F. Phys. Rev. D, 1999, 59: 09402217. Batley J R et al. Phys. Lett. B, 2008, 659: 493

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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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Recent results from NA48/2

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