According to the authors of the latest work published in Physical Review D, the FASER experiment proposed for the LHC by several scientists, including Dr Sebastian Trojanowski (NCBJ), will probably allow confirming the KOTO anomaly.

The latest results of the research for very rare decays of neutral kaon to vertical and neutrino/antineutrino pair were announced during the recent speech by a representative of the Japanese KOTO experiment at the international scientific conference ICHEP2020 (organized fully remotely due to the COVID19).

Although the expected frequency of this process in the Standard Model is almost 100 times lower than the current possibilities of the experiment, a year ago, contrary to the expectations, the observation of the first of three possible events was announced. Recent work has focused on a more accurately measuring the distorting background of the analysis, which is now at approximately 1 of the expected event in the detector.

This creates space for reflection on the possible discovery of new physics traces that will be tested in the future work of the KOTO experiment, as well as in the FASER detector at the LHC.

As noted in the recent work published in Physical Review D (analysis by Dr Felix Kling from the SLAC National Accelerator Laboratory in the USA and Dr Sebastian Trojanowski from the Theoretical Physics Division of the Fundamental Research Department in NCBJ) the LHC FASER has the chance to independently investigate up to 10,000 related spectacular events, or exclude many possible solutions to this mystery in the first weeks of its operation.

https: //journals. aps. org/prd/abstract/10.1103/PhysRevD. 102.015032

KOTO experiment: http: //koto. kek. jp