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Standard Model of particle physics is so far the most successful theory in the world of theoretical physics, which can explain the world of fundamental particles upto TeV scale with a great precision. In particular this model can explain accurately a wide range of experimental observations in the particle physics sector. The Standard Model (SM) of physics is the theory of three fundamental interactions of nature namely electromagnetic, strong and weak interactions. These three interactions are unified via a locally gauge invariant theory which belongs to a gauge group SU(3)C x SU(2)L xU(1)Y [1]. Among all the constituents of SM, a fundamental scalar particle, Higgs is the most important candidate. The presence of Higgs field can explain why some fundamental particles possess mass. Existence of all the constituents particle of SM was accurately observed through the several high energy experiments but Higgs boson was unseen for many years. Recently, in Large Hadron Collider (LHC) experiment, two detectors ATLAS and CMS has discovered a SM Higgs like particle with a mass around 125 GeV [2, 3]. This discovery has added another feather to the crown of SM of particle physics. But this creation of mankind is also not enough to understand the entire universe flawlessly and that is why we have some clear motivations to move beyond Standard Model
