Constraints on large scalar multiplets from perturbative unitarity
High Energy Physics - Phenomenology
2013-05-30 v2
Abstract
We determine the constraints on the isospin and hypercharge of a scalar electroweak multiplet from partial-wave unitarity of tree-level scattering diagrams. The constraint from SU(2)_L interactions yields T <= 7/2 (i.e., n <= 8) for a complex scalar multiplet and T <= 4 (i.e., n <= 9) for a real scalar multiplet, where n = 2T+1 is the number of isospin states in the multiplet.
Keywords
Cite
@article{arxiv.1202.5073,
title = {Constraints on large scalar multiplets from perturbative unitarity},
author = {Katy Hally and Heather E. Logan and Terry Pilkington},
journal= {arXiv preprint arXiv:1202.5073},
year = {2013}
}
Comments
10 pages, 1 figure. v2: refs added, minor additions to text, submitted to PRD