Lectures on EW Standard Model

Abstract

In this set of four lectures I will discuss some aspects of the Standard Model (SM) as a quantum field theory and related phenomenological observations which have played a crucial role in establishing the $SU(2{)}_L\times U(1{)}_Y$ gauge theory as the correct description of Electro-Weak (EW) interactions. I will first describe in brief the idea of EW unification as well as basic aspects of the Higgs mechanism of spontaneous symmetry breaking. After this I will discuss anomaly cancellation, custodial symmetry and implications of the high energy behavior of scattering amplitudes for the particle spectrum of the EW theory. This will be followed up by a discussion of the 'indirect' constraints on the SM particle masses such as $M_c,M_t$ and $M_h$ from various precision EW measurements. I will end by discussing the theoretical limits on $M_h$ and implications of the observed Higgs mass for the SM and beyond.

61 pages and 34 figures

References in corpus (2)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC