Higgs coupling constants as a probe of new physics
By S. Kanemura, Y. Okada, E. Senaha, C. Yuan. 2004
209 citations recorded by the source corpus.
We study new physics effects on the couplings of weak gauge bosons with the lightest CP-even Higgs boson (h), hZZ, and the trilinear coupling of the lightest Higgs boson, hhh, at the one-loop order, as predicted by the two Higgs doublet model. Those renormalized coupling constants can deviate from the standard model (SM) predictions due to two distinct origins: the tree level mixing effect of Higgs bosons and the quantum effect of additional particles in loop diagrams. The latter can be enhanced in the renormalized hhh coupling constant when the additional particles show the nondecoupling property. Therefore, even in the case where the hZZ coupling is close to the SM value, deviation in the hhh coupling from the SM value can become as large as plus 100%, while that in the hZZ coupling is at most minus 1% level. Such large quantum effect on the Higgs trilinear coupling is distinguishable from the tree level mixing effect, and is expected to be detectable at a future linear collider.
Subfields: Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/787044ebe3d2d10f88e8ea53de107ed12453db64
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In Nuclear and High Energy Physics
- M. Raidal
- G. Arcadi
- Abdelhak Djouadi
- Georg Weiglein
- H. Haber
- A. Miyamoto
- Igor P. Ivanov
- Florian Staub
Citations in the corpus
- Metastability bounds on the two Higgs doublet model (2013, unknown): “Further, the presence of this term also allows for a decoupling limit to occur in the 2HDM [37, 38].”
- ILC Higgs White Paper (2013, background): “As a dramatic example, the one loop correction to the triple Higgs boson coupling hhh is large because it receives a non-decoupling effect proportional to the quartic power of the top quark mass after renormalization [42, 43],”
- Dark Matter through the Higgs portal (2019, background): “The most relevant bounds are, as in the singlet Higgs case discussed before, as follows [398,399]:”