Search for a Higgs portal scalar decaying to electron-positron pairs in the MicroBooNE detector

, MicroBooNE Collaboration and Blake, A. and Devitt, D. and Nowak, J. and Thorpe, C. (2021) Search for a Higgs portal scalar decaying to electron-positron pairs in the MicroBooNE detector. Physical review letters, 127 (15). ISSN 1079-7114

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Abstract

We present a search for the decays of a neutral scalar boson produced by kaons decaying at rest, in the context of the Higgs portal model, using the MicroBooNE detector. We analyze data triggered in time with the Fermilab NuMI neutrino beam spill, with an exposure of $1.93\times10^{20}$ protons on target. We look for monoenergetic scalars that come from the direction of the NuMI hadron absorber, at a distance of 100 m from the detector, and decay to electron-positron pairs. We observe one candidate event, with a Standard Model background prediction of $1.9\pm0.8$. We set an upper limit on the scalar-Higgs mixing angle of $\theta

Item Type:
Journal Article
Journal or Publication Title:
Physical review letters
Additional Information:
© 2021 American Physical Society
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100
Subjects:
ID Code:
159532
Deposited By:
Deposited On:
13 Sep 2021 15:25
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Dec 2021 15:18