Back to Search
Start Over
Electroweak precision measurements of a nearly-degenerate Z′-Z system.
- Source :
-
Journal of High Energy Physics . May2024, Vol. 2024 Issue 5, p1-32. 32p. - Publication Year :
- 2024
-
Abstract
- In this paper, we discuss the possibility to probe a nearly-degenerate Z′-Z system by analyzing the Z-lineshape at an electron-positron collider. Compared with the usual Z′ in the literature well separated with the standard model (SM) Z boson in mass, the nearly-degenerate Z′-Z mixing affects the observed effective “oblique parameters” , , , and the effective deviation of “number of neutrino species” in a more complicated way and cannot be simply computed perturbatively up to a particular order. Aiming at solving this problem, we write down a general simplified effective Lagrangian and enumerate some parameter spaces corresponding to some typical models, and suggest a method to extract the constraints by looking into the line-shape of the Z-like resonance at an electron-positron collider. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11266708
- Volume :
- 2024
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of High Energy Physics
- Publication Type :
- Academic Journal
- Accession number :
- 179492788
- Full Text :
- https://doi.org/10.1007/JHEP05(2024)167