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arXiv 0903.4115hep-ex
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用KLOE实验搜索衰变phi -> K0bar K0bar gamma

Search for the decay phi -> K0 K0bar gamma with the KLOE experiment

KLOE Collaboration, F. Ambrosino, A. Antonelli, M. Antonelli, F. Archilli, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, S. Bocchetta, F. Bossi… 展开作者

KLOE Collaboration, F. Ambrosino, A. Antonelli, M. Antonelli, F. Archilli, P. Beltrame, G. Bencivenni, S. Bertolucci, C. Bini, C. Bloise, S. Bocchetta, F. Bossi, P. Branchini, G. Capon, T. Capussela, F. Ceradini, P. Ciambrone, E. De Lucia, A. De Santis, P. De Simone, G. De Zorzi, A. Denig, A. Di Domenico, C. Di Donato, B. Di Micco, M. Dreucci, G. Felici, S. Fiore, P. Franzini, C. Gatti, P. Gauzzi, S. Giovannella, E. Graziani, G. Lanfranchi, J. Lee-Franzini, M. Martini, P. Massarotti, S. Meola, S. Miscetti, M. Moulson, S. Müller, F. Murtas, M. Napolitano, F. Nguyen, M. Palutan, E. Pasqualucci, A. Passeri, V. Patera, P. Santangelo, B. Sciascia, T. Spadaro, M. Testa, L. Tortora, P. Valente, G. Venanzoni, R. Versaci, G. Xu

摘要:

我们在DAFNE的KLOE实验收集的大约1.5 × 10^9个φ衰变的样品中,通过探测K_s对加上一个光子,并使K_s介子衰变到π ^+ π ^-,来寻找φ-> K 0 K 0巴γ衰变。反应通过中间态f_0(980)γ、a_0(980)γ进行。我们发现5个事件与3.2事件预期从背景过程。我们得到了上限:在90% C. L时,BR(φ-> K 0 K 0巴-γ)<1.9 × 10 ^-8。.

英文摘要:

We have searched for the decay phi -> K0 K0bar gamma, by detecting K_s pairs plus a photon and with the K_s-mesons decaying to pi^+ pi^-, in a sample of about 1.5x 10^9 phi-decays collected by the KLOE experiment at DAFNE. The reaction proceeds through the intermediate states f_0(980) gamma, a_0(980) gamma. We find five events with 3.2 events expected from background processes. We obtain the upper limit: BR (phi -> K0 K0bar gamma) < 1.9x10^-8 at 90% C.L. .

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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