كارشناسي ارشد

ذرات بنيادي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده فيزيك

۱۳۹۶

ده، ۷۰ص.: مصور

غلامرضا خسروي

مسلم زارعي، صديقه سجاديان

1397/02/26

كتابنامه

فيزيك

فيزيك

ID12319

Abstract e standard model SM is one of the fundamantal theories of particle however this model has someshortcomings in some parts of physics whi led physicists to study physics beyond the standard model One of these studied models is two Higgs Doublet Model 2HDM In this thesis we consider the 2HDMto calculate the bran ing ratio for B a1 decays In the rst apter we review the SM andHiggs boson In the second apter we discuss the Higgs me anism in the SM In the third apter we discuss the 2HDM and e ective Hamiltonian and in apter 4 we consider the e ect of the 2HDMon B a1 decays We calculate the partial decay width and then the bran ing ratio Br forthese decays Chapter 5 is dedicated to our numerical analysis In this apter a comprision is madebetween our results and the SM value Key words Standard model Higgs boson 2HDM E ective Hamiltonian Partial decay width Bran ing ratio

غلامرضا خسروي

مسلم زارعي، صديقه سجاديان