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The TREK/E36 Experiment at J-PARC

Graduate #87
Discipline: Physics
Subcategory: Physics (not Nanoscience)

Dongwi H. Dongwi - Hampton University
Co-Author(s): Michael Kohl, Tongtong Cao



The Standard Model (SM) represents our best description of the subatomic world and has been very successful in explaining how elementary particles interact under the influence of the fundamental forces. Despite its far reaching success in describing the building blocks of matter, the SM is still incomplete; falling short to explain dark matter, baryogenesis, neutrino masses and much more. The E36 experiment conducted at J-PARC in Japan aims to test lepton universality in the $R_{K} = Gamma(K_{e2})/ Gamma(K_{mu2})$ ratio. In the SM, the ratio of leptonic $K^{+}$ decays is highly precise with an uncertainty of $bigtriangleup R_{K} /R_{K} = 4cdot10^{-4}$. Any observed deviation from the SM prediction would break the universality of the lepton couplings and provide a clear indication of New Physics (NP) beyond the SM. Furthermore, the E36 detector apparatus allows sensitivity to search for light $U(1)$ gauge bosons, which could be associated with dark matter or explain established muon-related anomalies such as the muon $g-2$ value, and perhaps the proton radius puzzle. A realistic simulation study is needed for these rare searches and as such verification of the Geant4/ROOT based simulation will be presented along with preliminary results.

frontiersCareer17.pdf

Funder Acknowledgement(s): This work has been supported by the following DOE grants: DOE DE-SC0003884 and DE-SC0013941

Faculty Advisor: Michael Kohl, kohlm@jlab.org

Role: I wrote the entire Geant4/ROOT based simulation toolkit for the experiment. Furthermore I participated in the installation and commissioning of various detectors. In addition, I wrote the High Voltage slowControl software. Currently I am working the particle ID analysis.

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This material is based upon work supported by the National Science Foundation (NSF) under Grant No. DUE-1930047. Any opinions, findings, interpretations, conclusions or recommendations expressed in this material are those of its authors and do not represent the views of the AAAS Board of Directors, the Council of AAAS, AAAS’ membership or the National Science Foundation.

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