S , T , U parameters in the B-LSSM*
Abstract
Abstract Using the pinch technique, we determine the one-loop vertices of weak interactions in the B-LSSM and incorporate their pinch contributions into the gauge boson self-energies. Compared to the definitions of the S , T , and U parameters in the Standard Model based on the group, the corresponding parameters in the local B-L gauge symmetry (B-LSSM) are modified. We present these redefined S , T , and U parameters and demonstrate the convergence of the results. In the framework of the low-energy effective Lagrangian for weak interactions, the S , T , and U parameters can be expressed as functions of specific parameters in the B-LSSM. The updated experimental and fitting results strongly constrain the parameter space of the B-LSSM.
Fields of Study & Subjects
Statistical Distribution Estimation and Applications
Scheduling and Timetabling Solutions
Advanced Statistical Process Monitoring
Publication details
- Journal / source
- Chinese Physics C
- Publisher
- IOP Publishing
- Volume
- 50
- Issue
- 6
- Pages
- 063109–063109
- Publication date
- 23 March 2026
- Language
- EN