Some new observations for the Georgi-Machacek scenario with triplet Higgs scalars

The Georgi-Machacek model, introducing a complex and real scalar triplet as additional components of the electroweak symmetry breaking sector, enables substantial contributions to weak gauge boson masses, subject equality vacuum expectation values (vev) via custodial SU(2) symmetry. We present an updated set constraints on this scenario, from collider data (including those 137/139~fb$^{-1}$ luminosity at Large Hadron Collider), available 125-GeV scalar, indirect limits also theoretical restrictions stability unitarity. It is found that some bounds get relaxed, phenomenological potential scenario more diverse, if doubly charged in spectrum can decay not only into two like-sign $W$'s but one or singly scalars. Other interesting features are noticed general approach, such $\gamma\gamma$ $Z\gamma$ branching ratios singlet appreciable strength trilinear interaction $W$ $Z$. Finally,, we take account possibility breaking, resulting inequality vevs which too principle may allow large contribution masses. Illustrative numerical results modified predictions presented, once taking all mentioned above.