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Tesi etd-09112019-220156

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Tipo di tesi
Tesi di laurea magistrale
Autore
RIBATTI, ROBERTO
URN
etd-09112019-220156
Titolo
Measurement of D0 - D0bar mixing parameters and search for CP violation in D0 -> K+pi- decays with LHCb Run 2 data
Dipartimento
FISICA
Corso di studi
FISICA
Relatori
relatore Dott. Morello, Michael Joseph
commissario Prof. Mannella, Riccardo
commissario Prof. Fidecaro, Francesco
commissario Prof. Forti, Francesco
commissario Prof. Guadagnini, Enore
commissario Prof. Leporini, Dino
commissario Prof. Roddaro, Stefano
commissario Prof. Shore, Steven Neil
Parole chiave
  • charm
  • CP violation
  • D0 mixing
  • heavy flavour physics
Data inizio appello
16/10/2019
Consultabilità
Completa
Riassunto
D0-D0bar mixing parameters are measured in the decay-time-dependent ratio of D0 → K+π- to D0 → K-π+ rates. The analysis uses a data sample of proton-proton collisions corresponding to an integrated luminosity of 5.9 fb-1 collected by LHCb experiment from 2015 to 2018 at the center-of-mass energy of 13 TeV. The strong-interaction decay D*+/- → D0 π+/- is used to infer the flavour of the D0 meson at production, then the measurement is performed separately for D0 and D0bar yielding a direct CP-violating asymmetry. Error estimation is determined, showing an improvement of about 35% with respect to the previous LHCb analysis.
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