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

Abstract
HTML
Reference
Related

PDF

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

[1]	Shun Zhou . Update on two-zero textures of the Majorana neutrino mass matrix in light of recent T2K, Super-Kamiokande and NOvA results. Chinese Physics C, 2016, 40(3): 033102. doi: 10.1088/1674-1137/40/3/033102
[2]	DING Gui-Jun , ZHOU Ye-Ling . Predicting lepton flavor mixing from Δ(48) and generalized CP symmetries. Chinese Physics C, 2015, 39(2): 021001. doi: 10.1088/1674-1137/39/2/021001
[3]	SUN Xi-Lei , HU Tao , ZHOU Li , CAO Jun , WANG Yi-Fang , ZHAN Liang , YU Bo-Xiang , CAI Xiao , FANG Jian , XIE Yu-Guang , AN Zheng-Hua , WANG Zhi-Gang , XUE Zhen , ZHANG Ai-Wu , NING Fei-Peng , GE Yong-Shuai , LIU Ying-Biao , , . Fast light of CsI(Na) crystals. Chinese Physics C, 2011, 35(12): 1130-1133. doi: 10.1088/1674-1137/35/12/009
[4]	S. Fiore (for the KLOE collaboration) . KLOE results on light mesons. Chinese Physics C, 2010, 34(9): 1379-1382. doi: 10.1088/1674-1137/34/9/047
[5]	PING Rong-Gang (for BES collaboration) . Charmonium results from BES. Chinese Physics C, 2010, 34(6): 626-631. doi: 10.1088/1674-1137/34/6/003
[6]	Michel Davier . New results on the hadronic vacuum polarization contribution to the muon g－2. Chinese Physics C, 2010, 34(6): 718-727. doi: 10.1088/1674-1137/34/6/018
[7]	Gabriel López Castro . Recent progress on isospin breaking corrections and their impact on the muon g－2 value. Chinese Physics C, 2010, 34(6): 712-717. doi: 10.1088/1674-1137/34/6/017
[8]	B. Meadows (representing the BABAR collaboration) . D⁰D⁰ mixing and other recent charm results from BABAR. Chinese Physics C, 2010, 34(6): 780-787. doi: 10.1088/1674-1137/34/6/028
[9]	H. E. Jackson (for the HERMES collaboration) . Recent results from the HERMES experiment. Chinese Physics C, 2010, 34(9): 1247-1253. doi: 10.1088/1674-1137/34/9/018
[10]	V. M. Aulchenko , E. M. Baldin , A. K. Barladyan . Recent results from the KEDR detector. Chinese Physics C, 2010, 34(6): 650-655. doi: 10.1088/1674-1137/34/6/007
[11]	Klaus Götzen (on behalf of the BES-Ⅲ collaboration) . Recent results on hadron spectroscopy from BES. Chinese Physics C, 2010, 34(6): 638-643. doi: 10.1088/1674-1137/34/6/005
[12]	LIU Bei-Jiang , for BES . Recent BES results on hadron spectroscopy. Chinese Physics C, 2010, 34(9): 1303-1306. doi: 10.1088/1674-1137/34/9/029
[13]	MIAO Ting-Ting , SHANG Yong , LIU Zhan-Wen , ZHAO Hong-Wei , SUN Liang-Ting , ZHANG Xue-Zhen , ZHAO Huan-Yu , WANG Hui , MA Bao-Hua , LI Xi-Xia , ZHU Yu-Hua , FENG Yu-Cheng , LI Jing-Yu . Experimental results of helicon sources. Chinese Physics C, 2009, 33(10): 892-896. doi: 10.1088/1674-1137/33/10/013
[14]	HAO Jian-Kui , ZHAO Kui . Recent progress on RF superconducting cavities. Chinese Physics C, 2009, 33(10): 930-934. doi: 10.1088/1674-1137/33/10/020
[15]	PENG Wen-Xi , WANG Huan-Yu , ZHANG Cheng-Mo , CUI Xing-Zhu , CAO Xue-Lei , ZHANG Jia-Yu , LIANG Xiao-Hua , WANG Jin-Zhou , GAO Min , YANG Jia-Wei , WU Ming-Ye . Prospective results of CHANG'E-2 X-ray spectrometer. Chinese Physics C, 2009, 33(10): 819-825. doi: 10.1088/1674-1137/33/10/001
[16]	Andreas Thomas , for the , oa MAMI , and A . Recent result from the A2 real photon facility at MAMI. Chinese Physics C, 2009, 33(12): 1120-1126. doi: 10.1088/1674-1137/33/12/012
[17]	SHEN Xiao-Yan , (for the BES Collaboration) . Recent results on light hadron spectroscopy from BESⅡ. Chinese Physics C, 2008, 32(6): 448-451. doi: 10.1088/1674-1137/32/6/009
[18]	SUN Liang-Ting , FENG Yu-Cheng , WANG Hui , LI Jin-Yu , CAO Yun , ZHANG Xue-Zhen , MA Bao-Hua , LI Xi-Xia , SHANG Yong , HE Wei , ZHU Yu-Hua , GUO Xiao-Hong , ZHANG Zi-Mi , . Preliminary Results of the Updated LECR2 Source-LECR2M. Chinese Physics C, 2007, 31(S1): 118-122.
[19]	Han Yong . Angular Momentum Projected Deformed HF Spectra of ⁴⁶Ti and ⁴⁸Cr With MSDI. Chinese Physics C, 1998, 22(11): 1020-1028.
[20]	KONG Ling-Jiang , KONG Fan-Xin , LIU Xian-Hui . ELASTIC SCATTERING OF K± MESONS BY ^40—48Ca AND THE ANALYSIS OF NEUTRON DISTRIBUTIONS. Chinese Physics C, 1985, 9(1): 46-54.

Access

Get Citation

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

RIS(for EndNote,Reference Manager,ProCite)

BibTex

Txt

Milestone

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

Article Metric

Article Views(2506)
PDF Downloads(518)
Cited by(0)

Policy on re-use

To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.

通讯作者: 陈斌, bchen63@163.com

1.
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.

HTML

Reference (1)

Recent results from NA48/2

Abstract：

References

Access

Article Metrics

Metrics

通讯作者: 陈斌, bchen63@163.com

Email This Article