We study the electroweak phase transition in three scalar extension models beyond the Standard Model.Assuming new scalars are decoupled at some heavy scale, we use the covariant derivative expansion method to derive a...We study the electroweak phase transition in three scalar extension models beyond the Standard Model.Assuming new scalars are decoupled at some heavy scale, we use the covariant derivative expansion method to derive all of the dimension-6 effective operators, whose coefficients are highly correlated in a specific model. We provide bounds to the complete set of dimension-6 operators by including the electroweak precision test and recent Higgs measurements. We find that the parameter space of strong first-order phase transitions(induced by the |H|~6 operator)can be probed extensively in Zh production at future electron-positron colliders.展开更多
基金supported in part by the National Science Foundation of China(11175069,11275009,11422545)supported by the NSFC(11121092,11033005,11375202)+1 种基金by the CAS Pilot-B programsupported by the China Postdoctoral Science Foundation(2016M590133,2017T100108)
文摘We study the electroweak phase transition in three scalar extension models beyond the Standard Model.Assuming new scalars are decoupled at some heavy scale, we use the covariant derivative expansion method to derive all of the dimension-6 effective operators, whose coefficients are highly correlated in a specific model. We provide bounds to the complete set of dimension-6 operators by including the electroweak precision test and recent Higgs measurements. We find that the parameter space of strong first-order phase transitions(induced by the |H|~6 operator)can be probed extensively in Zh production at future electron-positron colliders.
基金supported by the National Natural Science Foundation of China(12105248,11821505,12075300,and 12335005)the Peng-Huan-Wu Theoretical Physics Innovation Center(12047503)+1 种基金the Key R&D Program of the Ministry of Science and Technology(2017YFA0402204)the Key Research Program of the Chinese Academy of Sciences(XDPB15)。