Corvino, Michele (2020) Novel technique to measure Lepton Universality ratio RK at NA62. [Tesi di dottorato]
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| Tipologia del documento: | Tesi di dottorato |
|---|---|
| Lingua: | English |
| Titolo: | Novel technique to measure Lepton Universality ratio RK at NA62 |
| Autori: | Autore Email Corvino, Michele michele.corvino@cern.ch |
| Data: | 2020 |
| Istituzione: | Università degli Studi di Napoli Federico II |
| Dipartimento: | Fisica |
| Dottorato: | Fisica |
| Ciclo di dottorato: | 32 |
| Coordinatore del Corso di dottorato: | nome email Capozziello, Salvatore [non definito] |
| Tutor: | nome email Ambrosino, Fabio [non definito] |
| Data: | 2020 |
| Parole chiave: | lepton universality, NA62 experiment, kaon physics |
| Settori scientifico-disciplinari del MIUR: | Area 02 - Scienze fisiche > FIS/01 - Fisica sperimentale |
| Depositato il: | 31 Mar 2020 16:20 |
| Ultima modifica: | 17 Nov 2021 10:48 |
| URI: | http://www.fedoa.unina.it/id/eprint/12992 |
Abstract
Lepton universality is one of the key properties of the Standard Model (SM) and a clear indication of its violation could lead to the discovery of new physics. In kaon sector, lepton universality is tested measuring the ratio $R_K = \Gamma(K^+ \to e^+ \nu (\gamma))/\Gamma(K^+ \to \mu^+ \nu (\gamma)), which has a very precise theoretical estimation. In this work, the measurement of R_K using a subsample of data collected by NA62 experiment at CERN is presented. A new technique has been develope, collecting both sample with the same trigger stream and extracting BR(K^+ \to \mu^+ \nu (\gamma)) from events with muon decays in flight in order to minimize systematic effects. This new approach will pave the way to reach experimentally the same precision of the theoretical prediction.
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