In this paper,we calculate the top quark rare decays t→cγ and t→cg in an extension of the standard model,where baryon number and lepton number are local gauge symmetries.Adopting reasonable assumptions on the param...In this paper,we calculate the top quark rare decays t→cγ and t→cg in an extension of the standard model,where baryon number and lepton number are local gauge symmetries.Adopting reasonable assumptions on the parameter space,we find that the branching ratios of t→cγ and t→cg can reach 10 6and 10 5respectively,which can be detected in near future.展开更多
Using the efective Hamiltonian method, we analyze the B0-ˉB0mixing in the extension of the standard model(SM) where baryon number and lepton number are local gauge symmetries. The numerical results indicate the corre...Using the efective Hamiltonian method, we analyze the B0-ˉB0mixing in the extension of the standard model(SM) where baryon number and lepton number are local gauge symmetries. The numerical results indicate the correction from the extra particles to the mass diference mB is significant. There is a 60% enhancement compared to the SM prediction for mB at most, which agrees with the current experimental result.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.10975027,11275036,11047002Natural Science Fund of Hebei University under Grant Nos.2011JQ05 and 2012-242
文摘In this paper,we calculate the top quark rare decays t→cγ and t→cg in an extension of the standard model,where baryon number and lepton number are local gauge symmetries.Adopting reasonable assumptions on the parameter space,we find that the branching ratios of t→cγ and t→cg can reach 10 6and 10 5respectively,which can be detected in near future.
基金Supported by the National Natural Science Foundation of China(NNSFC)under Grant Nos.10975027,11275036,and 11047002
文摘Using the efective Hamiltonian method, we analyze the B0-ˉB0mixing in the extension of the standard model(SM) where baryon number and lepton number are local gauge symmetries. The numerical results indicate the correction from the extra particles to the mass diference mB is significant. There is a 60% enhancement compared to the SM prediction for mB at most, which agrees with the current experimental result.
