In this thesis, different directions for the search for Beyond Standard Model physics are explored. Possible new physics effects in precision measurements are analyzed in both in the high and low energy regime of collider experiments. The first part is dedicated to the study of electroweak anomalous Triple Gauge Couplings in diboson production at Large Hadron Collider, with an Effective Field Theory approach. In particular, the focus is on the lambda_Z and ilde{lambda}_Z parameters, associated to the contributions from O_{3W} and O_{3 ilde{W}} d = 6 operators. These deviations are quite hard to measure due to the suppression of their interference with the Standard Model amplitudes, in the inclusive cross section. Particular differential distributions are proposed, that can improve the sensitivity to the interference terms and the accuracy in the measurements of these interactions. In the second part there is an analysis of the so-called charged current B avor anomalies, which provide hints of Lepton Flavor Universality violation in semileptonic B meson decays. Data from Belle, BaBar and LHCb are considered. The study is performed making use of the Effective Field Theory language, at first in a model independent way and subsequently in a framework of Composite Higgs models, with Partial Compositeness as a mechanism to generate fermion masses.

Search for Beyond Standard Model physics at high and low energy colliders / Venturini, Elena. - (2019 Sep 26).

Search for Beyond Standard Model physics at high and low energy colliders

Venturini, Elena
2019

Abstract

In this thesis, different directions for the search for Beyond Standard Model physics are explored. Possible new physics effects in precision measurements are analyzed in both in the high and low energy regime of collider experiments. The first part is dedicated to the study of electroweak anomalous Triple Gauge Couplings in diboson production at Large Hadron Collider, with an Effective Field Theory approach. In particular, the focus is on the lambda_Z and ilde{lambda}_Z parameters, associated to the contributions from O_{3W} and O_{3 ilde{W}} d = 6 operators. These deviations are quite hard to measure due to the suppression of their interference with the Standard Model amplitudes, in the inclusive cross section. Particular differential distributions are proposed, that can improve the sensitivity to the interference terms and the accuracy in the measurements of these interactions. In the second part there is an analysis of the so-called charged current B avor anomalies, which provide hints of Lepton Flavor Universality violation in semileptonic B meson decays. Data from Belle, BaBar and LHCb are considered. The study is performed making use of the Effective Field Theory language, at first in a model independent way and subsequently in a framework of Composite Higgs models, with Partial Compositeness as a mechanism to generate fermion masses.
Azatov, Aleksandr
Romanino, Andrea
Spannowsky, Michael; Tesi, Andrea
Venturini, Elena
File in questo prodotto:
File Dimensione Formato  
Thesis_Venturini.pdf

accesso aperto

Tipologia: Tesi
Licenza: Non specificato
Dimensione 6.16 MB
Formato Adobe PDF
6.16 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/103221
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact