The Decay Of The New Particles In The Minimal B-L Model

The Standard Model(SM)of particle physics describes the strong interactions,weak in-teractions and electromagnetic interactions between elementary particles.Even if it has been tested by most experiments so far,it still has some limitations.Both theories and experiments show that,there should exist new physics at TeV energy scale,which have prompted people to extend the SM.As one of the minimal U(1)extension models of the SM,the B-L model promoted the B-L global symmetry of the SM to U(1)' local gauge symmetry,therefore in-troducing a new neutral gauge boson Z'.In the minimal B-L extension of the SM,in order to cancel the gauge anomalies,it need to introduce three right-handed neutrinos fields and a complex scalar singlet field which for the spontaneous breaking of the U(1)'.In this paper,we study the decay of the new gauge boson Z' and the heavy Higgs boson h2 in the framework of the minimal B-L model.In the kinematically allowed parameter space,Z' can decay into a pair of neutrinos or a pair of fermions.The decay widths of the Z' boson depend on two free parameters which are g1'(coupling constant)and MZ'(the mass of the Z' gauge boson),and its value will increase with g1' and MZ' respectively.In the kinematically allowed parameter space,the primary decay channels of the heavy Higgs particle are:h2?qq(q= d,u,s,c,b),h2 ? tt,h2?l+l-(l=e,?,?),h2?vlvl,h2?vhvh,h2?vhvh,h2?W+W-,h2?ZZ,h2?Z'Z' and h2?h1h1.For the channel of the qq(d,u,s,c,b)?tt?l+l-(l = e,?,?)?W+W-and ZZ,the decay widths depend on sin ?H(sin ?H is the mixing angle between the two Higgs bosons)and mh2(the mass of the heavy Higgs boson),and its value will increase with them respectively.For the channel of the neutrinos,the decay widths depend on sin?H?mH2 and mvh(the mass of the heavy neutrinos).Its value will increase with mh2 and mvh respectively,while the value will decrease with the increase of sin ?H.For the channel of the Z'Z',the decay widths don't depend on the?H,but the ?H is related to the branching ratio(BR).BRh2?Z;Z;will decrease with the increase of ?H.These new particles and new interactions will produce rich and unique new physical phe-nomena in the high energy experiments,we hope that our work in this paper will provide some help and reference to the physical experiments at the high energy colliders,such as LHC and ILC.