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RGE properties of 2HDM in relation to data on B->Dtu

Oredsson, Joel LU (2014) FYTK01 20132
Theoretical Particle Physics - Undergoing reorganization
Department of Astronomy and Theoretical Physics - Undergoing reorganization
Abstract
In this thesis we investigate the properties of a specific two Higgs Doublet Model (2HDM) that can be used to explain the data on B->Dtu and B->D*tu, which deviate from the Standard Model (SM) by 3.4 sigma. The 2HDM is the simplest extension of the Standard model scalar sector. Phenomenologically it is very rich with 4 new Higgs bosons: 2 neutral and an electromagnetic charged pair. The 2HDMs exhibits tree-level flavor changing neutral currents (FCNC) which are constrained by experiments and therefore need to be suppressed in the model. These FCNC depends on the masses of the Higgs bosons and the couplings in the Yukawa sector. We investigate the possible mass spectrum of the model by requiring vacuum stability, tree-level unitarity and... (More)
In this thesis we investigate the properties of a specific two Higgs Doublet Model (2HDM) that can be used to explain the data on B->Dtu and B->D*tu, which deviate from the Standard Model (SM) by 3.4 sigma. The 2HDM is the simplest extension of the Standard model scalar sector. Phenomenologically it is very rich with 4 new Higgs bosons: 2 neutral and an electromagnetic charged pair. The 2HDMs exhibits tree-level flavor changing neutral currents (FCNC) which are constrained by experiments and therefore need to be suppressed in the model. These FCNC depends on the masses of the Higgs bosons and the couplings in the Yukawa sector. We investigate the possible mass spectrum of the model by requiring vacuum stability, tree-level unitarity and perturbativity, as well as making sure the model is within limits of the experimental electroweak precision tests. Then we use renormalization group equations (RGEs) to evolve the Yukawa couplings to see when they reach the limits set by FCNC. (Less)
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author
Oredsson, Joel LU
supervisor
organization
course
FYTK01 20132
year
type
M2 - Bachelor Degree
subject
keywords
particle physics, high energy physics, B meson, two Higgs doublet model, 2HDM, Higgs, RGE, BSM
language
English
id
4279775
date added to LUP
2014-02-02 22:50:19
date last changed
2017-10-06 17:05:00
@misc{4279775,
  abstract     = {{In this thesis we investigate the properties of a specific two Higgs Doublet Model (2HDM) that can be used to explain the data on B->Dtu and B->D*tu, which deviate from the Standard Model (SM) by 3.4 sigma. The 2HDM is the simplest extension of the Standard model scalar sector. Phenomenologically it is very rich with 4 new Higgs bosons: 2 neutral and an electromagnetic charged pair. The 2HDMs exhibits tree-level flavor changing neutral currents (FCNC) which are constrained by experiments and therefore need to be suppressed in the model. These FCNC depends on the masses of the Higgs bosons and the couplings in the Yukawa sector. We investigate the possible mass spectrum of the model by requiring vacuum stability, tree-level unitarity and perturbativity, as well as making sure the model is within limits of the experimental electroweak precision tests. Then we use renormalization group equations (RGEs) to evolve the Yukawa couplings to see when they reach the limits set by FCNC.}},
  author       = {{Oredsson, Joel}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{RGE properties of 2HDM in relation to data on B->Dtu}},
  year         = {{2014}},
}