| Thesis | |
| Report number | CERN-THESIS-2024-263 ; CMS TS-2024-022 |
| Title | Search for rare decays of the Higgs boson into a photon and a $\rho$, $\phi$ or $K^{∗0}$ meson with the CMS experiment |
| Author(s) | Umoret, Giulio (Turin U.) |
| Publication | 2024 - 148. |
| Thesis note | PhD : Turin U. : 2024 |
| Thesis supervisor(s) | Covarelli, Roberto ; Pelliccioni, Mario |
| Note | Presented 17 May 2024 |
| Subject category | Particle Physics - Experiment |
| Accelerator/Facility, Experiment | CERN LHC ; CMS |
| Abstract | Higgs-boson decays into a photon and a $\rho$(770), $\phi$(1020), or $\Kstar$ (892) meson are searched for using proton-proton collision data collected by the CMS experiment at the LHC at $\sqrt{s}=13$ TeV. Events are selected in which the mesons decay into pairs of charged pions, pairs of charged kaons, and charged kaon-pion pairs respectively. Depending on the Higgs-boson production mode, different signal triggering and reconstruction techniques are adopted. The analysed data sets correspond to an integrated luminosity varying between 40 and 137 $\fbinv$, depending on the detailed final state. By combining these production modes, no significant excess above the background expectations is observed in any search channel. Upper limits at the 95 \% confidence level on the Higgs boson branching fractions into $\RhoGamma$, $\PhiGamma$, and $\KstarGamma$ are determined to be $3.74 \cdot 10^{-4}$, $2.97 \cdot 10^{-4}$, and $1.71 \cdot 10^{-4}$, respectively. These results constitute the most stringent experimental limits to date on the aforementioned decay channels. |
Corresponding record in: Inspire
Email contact: [email protected]
Datensatz erzeugt am 2024-12-11, letzte Änderung am 2024-12-20
