dc.rights.license | CC-BY-NC-ND | |
dc.contributor.advisor | Snellings, R.J.M. | |
dc.contributor.advisor | Shen, X.Y. | |
dc.contributor.author | Boer, R.E. de | |
dc.date.accessioned | 2020-02-20T19:03:55Z | |
dc.date.available | 2020-02-20T19:03:55Z | |
dc.date.issued | 2019 | |
dc.identifier.uri | https://studenttheses.uu.nl/handle/20.500.12932/34881 | |
dc.description.abstract | The BESIII collaboration has produced the largest, clean sample of 𝐽/𝜓 mesons through 𝑒⁺𝑒⁻ collisions. These collisions are used to performed detailed studies of decays involving charmed mesons. In this study, a new upper limit has been set on the rare, weak decays 𝐽/𝜓 → 𝐷⁰𝜙 and 𝐽/𝜓 → 𝐷⁰𝜔 using hadronic decay modes 𝐷⁰ → 𝐾⁺𝜋⁻, φ → 𝐾⁺𝐾⁻, and ω → 𝜋⁺𝜋⁻𝜋⁰, 𝜋⁰ → 𝛾𝛾 using a sample of 10 billion 𝐽/𝜓 events. The upper limits of the branching ratios determined by this study are ℬ(𝐽/𝜓 → 𝐷⁰𝜙) < 3.4·10⁻⁷ and ℬ(𝐽/𝜓 → 𝐷⁰ω) < 2.1·10⁻⁶ with systematic uncertainties of at least 5.8% and 6.1% respectively. These are the first upper limits set on these decay channels, but these results can be quoted only after more systematic uncertainties have been evaluated. | |
dc.description.sponsorship | Utrecht University | |
dc.format.extent | 8079141 | |
dc.format.mimetype | application/pdf | |
dc.language.iso | en | |
dc.title | Rare, weak 𝐽/𝜓 decays in BESIII: 𝐽/𝜓 → 𝐷⁰𝜙 and 𝐽/𝜓 → 𝐷⁰𝜔 | |
dc.type.content | Master Thesis | |
dc.rights.accessrights | Open Access | |
dc.subject.keywords | hadron spectrometry, bes3, besiii, charmonium, new physics, Jpsi, upper limit | |
dc.subject.courseuu | Experimental Physics | |