Study of the K0(L) --> pi0 pi0 nu nu-bar decay
High Energy Physics - Experiment
2013-05-29 v2
Abstract
The rare decay K0(L) --> pi0 pi0 nu nu-bar was studied with the E391a detector at the KEK 12-GeV proton synchrotron. Based on 9.4 x 10^9 K0L decays, an upper limit of 8.1 x 10^{-7} was obtained for the branching fraction at 90% confidence level. We also set a limit on the K0(L) --> pi0 pi0 X (X --> invisible particles) process; the limit on the branching fraction varied from 7.0 x 10^{-7} to 4.0 x 10^{-5} for the mass of X ranging from 50 MeV/c^2 to 200 MeV/c^2.
Keywords
Cite
@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}
}
Comments
5 pages, 5 figures