Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector
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 o...
| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/141998 |
| _version_ | 1811068430231535616 |
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| author | Conrad, Janet Hen, Or |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Conrad, Janet Hen, Or |
| author_sort | Conrad, Janet |
| collection | MIT |
| description | 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 $\theta<(3.3-4.6)\times10^{-4}$ at the 95% confidence level for
scalar boson masses in the range $(100-200)$ MeV$/c^2$. We exclude at the 95%
confidence level the remaining model parameters required to explain the central
value of a possible excess of $K^0_L\rightarrow\pi^0\nu\bar{\nu}$ decays
reported by the KOTO collaboration. We also provide a model-independent limit
on a new boson $X$ produced in $K\rightarrow\pi X$ decays and decaying to
$e^+e^-$. |
| first_indexed | 2024-09-23T07:55:52Z |
| format | Article |
| id | mit-1721.1/141998 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T07:55:52Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1419982023-01-30T20:56:43Z Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector Conrad, Janet Hen, Or Massachusetts Institute of Technology. Department of Physics 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 $\theta<(3.3-4.6)\times10^{-4}$ at the 95% confidence level for scalar boson masses in the range $(100-200)$ MeV$/c^2$. We exclude at the 95% confidence level the remaining model parameters required to explain the central value of a possible excess of $K^0_L\rightarrow\pi^0\nu\bar{\nu}$ decays reported by the KOTO collaboration. We also provide a model-independent limit on a new boson $X$ produced in $K\rightarrow\pi X$ decays and decaying to $e^+e^-$. 2022-04-21T12:46:19Z 2022-04-21T12:46:19Z 2021 2022-04-21T12:42:54Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/141998 Conrad, Janet and Hen, Or. 2021. "Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector." Physical Review Letters, 127 (15). en 10.1103/PHYSREVLETT.127.151803 Physical Review Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS |
| spellingShingle | Conrad, Janet Hen, Or Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title | Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title_full | Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title_fullStr | Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title_full_unstemmed | Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title_short | Search for a Higgs Portal Scalar Decaying to Electron-Positron Pairs in the MicroBooNE Detector |
| title_sort | search for a higgs portal scalar decaying to electron positron pairs in the microboone detector |
| url | https://hdl.handle.net/1721.1/141998 |
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