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| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Tully, Chris G | en_US |
| dc.contributor.author | Quan, Xiaohang | en_US |
| dc.contributor.other | Physics Department | en_US |
| dc.date.accessioned | 2013-09-16T17:26:20Z | - |
| dc.date.available | 2013-09-16T17:26:20Z | - |
| dc.date.issued | 2013 | en_US |
| dc.identifier.uri | http://arks.princeton.edu/ark:/88435/dsp01qz20ss62r | - |
| dc.description.abstract | We present results for the search for the Standard Model Higgs boson in the two-photon channel using the full 2011+2012 dataset recorded by the CMS experiment at the LHC. The MVA analysis, most sensitive for discovery, observes an excess of events at 125 GeV with a local significance of 3.2 sigma. The mass of the observed boson is measured to be 125.4 +- 0.5(stat.) +- 0.6(syst.) GeV. For a Higgs boson mass hypothesis of 125 GeV, the best fit signal strength is 0.78 + 0.28 - 0.26 times the SM Higgs boson cross-section. An upper limit on its natural width is found to be 6.9 GeV/c^2 at 95% confidence level. We also present results from searches for an additional Higgs boson decaying into two photons, treating the observed resonance as a background process. Cases in which the additional state is SM-like, fermiophobic or gauge-phobic have been considered. In addition, we present a search targeted at discriminating between a single Higgs boson at 125 GeV and two very close-by ones. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | Princeton, NJ : Princeton University | en_US |
| dc.relation.isformatof | The Mudd Manuscript Library retains one bound copy of each dissertation. Search for these copies in the <a href=http://catalog.princeton.edu> library's main catalog </a> | en_US |
| dc.subject | 2HDM | en_US |
| dc.subject | CMS | en_US |
| dc.subject | Diphoton | en_US |
| dc.subject | Higgs | en_US |
| dc.subject | Observation | en_US |
| dc.subject.classification | Physics | en_US |
| dc.title | OBSERVATION AND MEASUREMENT OF THE HIGGS-LIKE BOSON AT 125 GEV IN THE TWO-PHOTON DECAY CHANNEL WITH THE CMS EXPERIMENT | en_US |
| dc.type | Academic dissertations (Ph.D.) | en_US |
| pu.projectgrantnumber | 690-2143 | en_US |
| Appears in Collections: | Physics | |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Quan_princeton_0181D_10752.pdf | 2.2 MB | Adobe PDF | View/Download |
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