logo SBA

ETD

Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-06222011-002330


Tipo di tesi
Tesi di laurea magistrale
Autore
PERUZZI, MARCO
URN
etd-06222011-002330
Titolo
First measurement of vector boson polarization at LHC
Dipartimento
SCIENZE MATEMATICHE, FISICHE E NATURALI
Corso di studi
FISICA
Relatori
relatore Prof. Rolandi, Luigi
Parole chiave
  • cms
  • lhc
  • polarization
  • vector
Data inizio appello
19/07/2011
Consultabilità
Non consultabile
Data di rilascio
19/07/2051
Riassunto
In this thesis, the theoretical SM predictions for vector boson polarization are first presented, and the mechanism leading to this effect discussed; then, after having introduced the properties of physics objects used in the analysis, the first measurement of W and Z polarization at a proton-proton collider with the Compact Muon Solenoid (CMS) is reported. Polarization information is extracted in the helicity frame from distributions of kinematic quantities of decay leptons by means of a fit with templates obtained by a MC simulation. Results are compared to expectations from theoretical Standard Model calculations. They are found to be consistent with each other within the present sensitivity.
File