PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
PHYS08200604017 Manimala Mitra - Homi Bhabha National Institute
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Contents<br />
1 Introduction 1<br />
1.1 Standard Model of Particle Physics . . . . . . . . . . . . . . . . . . . . . . 1<br />
1.1.1 Higgs Mechanism and Fermion Mass . . . . . . . . . . . . . . . . . 2<br />
1.2 Problems of the Standard Model . . . . . . . . . . . . . . . . . . . . . . . . 4<br />
1.3 Minimal Supersymmetric Standard Model . . . . . . . . . . . . . . . . . . 6<br />
2 Neutrino Mass and Mixing 15<br />
2.1 Flavor Mixing and Neutrino Oscillation . . . . . . . . . . . . . . . . . . . . 16<br />
2.2 Neutrino Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />
2.2.1 Dirac Mass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20<br />
2.2.2 Majorana Mass and Seesaw . . . . . . . . . . . . . . . . . . . . . . 20<br />
2.2.3 Supersymmetric Seesaw . . . . . . . . . . . . . . . . . . . . . . . . 23<br />
2.2.4 Seesaw and Grand Unified Theory . . . . . . . . . . . . . . . . . . . 23<br />
2.3 Flavor Symmetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25<br />
2.3.1 The Flavor Symmetry Group A 4 . . . . . . . . . . . . . . . . . . . . 25<br />
2.3.2 The Flavor Symmetry Group S 3 . . . . . . . . . . . . . . . . . . . . 27<br />
3 Two Higgs Doublet Type-III Seesaw 35<br />
3.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35<br />
3.2 Yukawa Couplings and Lepton Masses and Mixing . . . . . . . . . . . . . . 37<br />
3.3 A µ-τ Symmetric Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42<br />
3.4 Heavy Fermion Production at LHC . . . . . . . . . . . . . . . . . . . . . . 48<br />
3.5 Heavy Fermion Decays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50<br />
3.5.1 Decay to Light Leptons and Higgs . . . . . . . . . . . . . . . . . . . 50<br />
3.5.2 Decay to Light Leptons and Vector Bosons . . . . . . . . . . . . . . 56<br />
3.5.3 Comparing Σ ±/0<br />
m Decays to Higgs and Gauge Bosons . . . . . . . . 57<br />
xi