K0(L) --> pi0 pi0 nu nu-bar 衰变的研究
高能物理 - 实验
2013-05-29 v2
摘要
利用 KEK 12 GeV 质子同步加速器上的 E391a 探测器研究了稀有衰变 K0(L) --> pi0 pi0 nu nu-bar。基于 9.4 × 10^9 个 K0L 衰变事例，在 90% 置信水平下得到该衰变分支比的上限为 8.1 × 10^{-7}。我们还对 K0(L) --> pi0 pi0 X（X --> 不可见粒子）过程设定了限制；对于 X 的质量范围从 50 MeV/c^2 到 200 MeV/c^2，其分支比上限在 7.0 × 10^{-7} 至 4.0 × 10^{-5} 之间变化。
引用
@article{arxiv.1106.3404,
title = {Study of the K0(L) --> pi0 pi0 nu nu-bar decay},
author = {E391a Collaboration and R. Ogata and S. Suzuki and J. K. Ahn and Y. Akune and V. Baranov and K. F. Chen and J. Comfort and M. Doroshenko and Y. Fujioka and Y. B. Hsiung and T. Inagaki and S. Ishibashi and N. Ishihara and H. Ishii and E. Iwai and T. Iwata and I. Kato and S. Kobayashi and S. Komatsu and T. K. Komatsubara and A. S. Kurilin and E. Kuzmin and A. Lednev and H. S. Lee and S. Y. Lee and G. Y. Lim and J. Ma and T. Matsumura and A. Moisseenko and H. Morii and T. Morimoto and Y. Nakajima and T. Nakano and H. Nanjo and N. Nishi and J. Nix and T. Nomura and M. Nomachi and H. Okuno and K. Omata and G. N. Perdue and S. Perov and S. Podolsky and S. Porokhovoy and K. Sakashita and T. Sasaki and N. Sasao and H. Sato and T. Sato and M. Sekimoto and T. Shimogawa and T. Shinkawa and Y. Stepanenko and Y. Sugaya and A. Sugiyama and T. Sumida and Y. Tajima and S. Takita and Z. Tsamalaidze and T. Tsukamoto and Y. C. Tung and Y. W. Wah and H. Watanabe and M. L. Wu and M. Yamaga and T. Yamanaka and H. Y. Yoshida and Y. Yoshimura and Y. Zheng},
journal= {arXiv preprint arXiv:1106.3404},
year = {2013}
}
备注
5 pages, 5 figures