A Twisted custodial symmetry in the two-Higgs-doublet model
(2007) Physical Review Letters — Vol. 98, n° 25, p. 251802 (2007)
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- Abstract
- (en) In the Standard Model for electroweak interactions, the Higgs sector is known to display a "custodial" symmetry protecting the mass relation m_{W^\pm}^2=m_{W_3}^2 from large corrections. When considering extensions of the scalar sector, this symmetry has to be introduced by hand in order to pass current electroweak precision tests in a natural way. In this Letter we implement a generalized custodial symmetry in the two-Higgs-doublet model. Assuming the invariance of the potential under CP transformations, we prove the existence of a new custodial scenario characterized by m_{H^\pm}^2=m_{H^0}^2 instead of m_{H^\pm}^2=m_{A^0}^2. Consequently the pseudoscalar A^0 may be much lighter than the charged H^\pm, giving rise to interesting phenomenology. Comment: 4 pages, RevTeX4
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Gérard, J.-M., & Herquet, M. (2007). A Twisted custodial symmetry in the two-Higgs-doublet model. Physical Review Letters, 98(25), 251802. https://doi.org/10.1103/PhysRevLett.98.251802 (Original work published 2007)