The lepton flavor violating process μ - eγ has been previously studied in a model of electroweak-scale right-handed neutrinos. In that work the decay amplitude was computed in unitarity gauge, augmented by some tech...The lepton flavor violating process μ - eγ has been previously studied in a model of electroweak-scale right-handed neutrinos. In that work the decay amplitude was computed in unitarity gauge, augmented by some technical considerations that correct the leading term thus obtained. This complication arises because the mixing matrices appearing in the weak charged currents are not unitary in the model. In this paper, we recalculate the amplitude in Re gauge. The cancellation of the ξ dependence in the final result serves as a useful check to both the obtained amplitude and the technical points made in the previous work.展开更多
Objective： Fractures of the capitellum and trochlea constitute less than 1% of all elbow fractures and a shear fracture involving the capitellum and extending medially into most of the trochlea is rarely reported. Ty...Objective： Fractures of the capitellum and trochlea constitute less than 1% of all elbow fractures and a shear fracture involving the capitellum and extending medially into most of the trochlea is rarely reported. Type Ⅳ capitellum fracture is still controversial in regard to its ra- diographic appearance, surgical approach and osteosynthesis. We report 10 cases of type Ⅳ capitellum fracture with a view to elucidating its clinical features and treatment outcome. Methods： We treated 10 patients of type Ⅳ capitellum fracture with a mean age of 32 years. A uniform surgical approach and postoperative rehabilitation were followed. Results： Nine patients presented to us after a mean of 4 days of injury and one patient was nonunion after 6 months of injury who had been treated conservatively by a bone setter. Double arc sign was absent in 6 cases. Intraopera- tively 6 capitellotrochlear fragments were devoid of soft tissue attachments. By Mayo Elbow Performance Score evaluation, 7 patients got excellent, 2 good and 1 fair results. One patient with associated elbow dislocation developed heterotopic ossification. There was no case of avascular necrosis, osteoarthrosis or fixation failures. Conclusions： Type Ⅳ capitellum fractures are rare and belong to complex articular injuries. A good functional out- come can only be achieved with open reduction and stable internal fixation followed by early mobilization. Preopera- tive radiographic assessment and computed tomography help surgeons in choosing the right surgical approach and implants. Good surgical technique and stable internal fixa- tion are the keys to early mobilization and good functional outcome.展开更多
文摘The lepton flavor violating process μ - eγ has been previously studied in a model of electroweak-scale right-handed neutrinos. In that work the decay amplitude was computed in unitarity gauge, augmented by some technical considerations that correct the leading term thus obtained. This complication arises because the mixing matrices appearing in the weak charged currents are not unitary in the model. In this paper, we recalculate the amplitude in Re gauge. The cancellation of the ξ dependence in the final result serves as a useful check to both the obtained amplitude and the technical points made in the previous work.
文摘Objective： Fractures of the capitellum and trochlea constitute less than 1% of all elbow fractures and a shear fracture involving the capitellum and extending medially into most of the trochlea is rarely reported. Type Ⅳ capitellum fracture is still controversial in regard to its ra- diographic appearance, surgical approach and osteosynthesis. We report 10 cases of type Ⅳ capitellum fracture with a view to elucidating its clinical features and treatment outcome. Methods： We treated 10 patients of type Ⅳ capitellum fracture with a mean age of 32 years. A uniform surgical approach and postoperative rehabilitation were followed. Results： Nine patients presented to us after a mean of 4 days of injury and one patient was nonunion after 6 months of injury who had been treated conservatively by a bone setter. Double arc sign was absent in 6 cases. Intraopera- tively 6 capitellotrochlear fragments were devoid of soft tissue attachments. By Mayo Elbow Performance Score evaluation, 7 patients got excellent, 2 good and 1 fair results. One patient with associated elbow dislocation developed heterotopic ossification. There was no case of avascular necrosis, osteoarthrosis or fixation failures. Conclusions： Type Ⅳ capitellum fractures are rare and belong to complex articular injuries. A good functional out- come can only be achieved with open reduction and stable internal fixation followed by early mobilization. Preopera- tive radiographic assessment and computed tomography help surgeons in choosing the right surgical approach and implants. Good surgical technique and stable internal fixa- tion are the keys to early mobilization and good functional outcome.
