Введение
2 Supersymmetry and the Supersymmetric Extension of the Standard Model 5
2.1 Supersymmetry 7
2.2 MSSM 9
2.2.1 Structure of the MSSM 10
2.3 Minimal Supergravity 14
2.4 The mSUGRA Sparticle Spectrum 19
2.4.1 Squarks and Sleptons 19
2.4.2 Neutralinos and Charginos 21
2.4.3 A Sample of mSUGRA Sparticle Spectrum 22
3 Favoured Regions of mSUGRA Parameter Space 25
3.1 Theoretical and Experimental Constraints 26
3.2 (mo-mi/2) Plane of Parameters Space 30
3.2.1 Favoured Parameter Regions 30
3.2.2 The case for Non-zero A0 35
4 mSUGRA Co-annihilation Region and Long-lived Charged Sleptons 39
4.1 The (x?-r) Co-annihilation Region -motivations for Long-lived Spartides 41
4.2 Long-lived r Charged Sparticle 43
4.3 Production Cross Section of Long-lived r Charged Sparticle at LHC . 47
4.4 Discussion 51
5 Light Scalar top quarks 52
5.1 The Light Stop Scenario -Long-lived Scalar top quarks 53
5.2 Phenomenological Consequences of the Light Stop Scenario 58
5.2.1 Stop decay modes and lifetime 59
5.3 Discussion 63
6 Long-lived Charginos in the Focus Point Region 64
6.1 The Focus Point Region of mSUGRA Parameter Space 65
6.2 Phenomenological consequences of the light Chargino 73
6.3 Discussion 79
Conclusions 81
Bibliography 84
List of Tables 101
List of Figures 102
Acknowledgements 106
