摘要
When the fourth generation of quarks have sufficiently small mixing with ordinary standard-model 1＋ quarks, the hadrons made up from these quarks can be long-lived enough. We analyze the 1/2 baryon states containing fourth-generation quarks and standard-model quarks, i.e. the charm or bottom quarks, in the QCD sum rules approach. Considering the perturbative and two gluon condensate contributions in the calculation, we give the numerical results of the masses and pole residues.
When the fourth generation of quarks have sufficiently small mixing with ordinary standard-model 1＋ quarks, the hadrons made up from these quarks can be long-lived enough. We analyze the 1/2 baryon states containing fourth-generation quarks and standard-model quarks, i.e. the charm or bottom quarks, in the QCD sum rules approach. Considering the perturbative and two gluon condensate contributions in the calculation, we give the numerical results of the masses and pole residues.
基金
Supported by NSFC (10675108)
