Virdee, Govindraj Singh (2022). Searching for rare and forbidden exclusive Higgs boson decays with the Atlas detector. University of Birmingham. Ph.D.
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Virdee2022PhD.pdf
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Abstract
Searches for Higgs and Z bosons decaying to an ω meson and a photon, and for Higgs bosons decaying to a K\(^∗\) and a photon are discussed using proton collision data recorded by the ATLAS experiment at √s = 13 TeV between 2016 and 2018. The observed events are consistent with the expected background. The obtained 95% confidence level upper limit on the branching ratio for the H → ωγ decay using 89.5 fb\(^{−1}\) of data is 1.0 ×10\(^{−4}\) assuming a Standard Model Higgs Boson production. The analogous limit obtained for the Z → ωγ decay is 3.5 ×10\({−7}\). The obtained upper limit for the H → K\(^∗\)γ decay is 8.9 ×10\(^{−5}\), using 134 fb\(^{−1}\) of data. The search for H → K\(^∗\)γ represents the first search for a flavour-violating exclusive decay of the Higgs boson.
| Type of Work: | Thesis (Doctorates > Ph.D.) | |||||||||
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| Award Type: | Doctorates > Ph.D. | |||||||||
| Supervisor(s): |
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| Licence: | All rights reserved | |||||||||
| College/Faculty: | Colleges (2008 onwards) > College of Engineering & Physical Sciences | |||||||||
| School or Department: | School of Physics and Astronomy | |||||||||
| Funders: | European Research Council | |||||||||
| Subjects: | Q Science > QC Physics | |||||||||
| URI: | http://etheses.bham.ac.uk/id/eprint/13123 |
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