Volume 405 - 7th Symposium on Prospects in the Physics of Discrete Symmetries, DISCRETE 2020-2021 (DISCRETE2020-2021) - Parallel sessions Thursday
Status of the $K_L^0 \to \pi^0 \nu \overline{\nu}$ Search at the KOTO Experiment
C. Lin
Full text: pdf
Pre-published on: March 30, 2022
Published on:
Abstract
KOTO is searching for New Physics through the $K_L^0\to\pi^0\nu\overline{\nu}$ decay. We report the two major backgrounds of $K_L^0 \to \pi^0 \nu \overline{\nu}$ search at KOTO: $K_L^0$ and $K^+$ produced at the collimator. In order to suppress them, an in-beam veto counter has been installed at the KOTO detector entrance to detect $K^{+}$ particles. Also, an algorithm connecting the cluster shape with the reconstructed incident angle has been developed to suppress the beam halo $K_L^0$ decays. With those tools, KOTO is prepared to explore the sensitivity of $O(10^{-10})$. We also search for the ${K_L^0\to\pi^0 X}$ decay, where $X$ is a hypothetical invisible particle, and set $BR(K_L^0 \to \pi^0 X, M_{X} \approx M_{\pi^0}) < 3.7 \times 10^{-9}$ (90\% C.L.) (preliminary).
DOI: https://doi.org/10.22323/1.405.0069
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access