Light scalar at LHC: the Higgs or the dilaton?
| dc.creator | Goldberger, Walter D. | |
| dc.creator | Grinstein, Benjamin | |
| dc.creator | Skiba, Witold | |
| dc.date | 2007-08-10 | |
| dc.date.accessioned | 2026-07-07T11:41:49Z | |
| dc.date.available | 2026-07-07T11:41:49Z | |
| dc.description | It is likely that the LHC will observe a color- and charge-neutral scalar whose decays are consistent with those of the Standard Model (SM) Higgs boson. The Higgs interpretation of such a discovery is not the only possibility. For example, electroweak symmetry breaking (EWSB) could be triggered by a spontaneously broken, nearly conformal sector. The spectrum of states at the electroweak scale would then contain a narrow scalar resonance, the pseudo-Goldstone boson of conformal symmetry breaking, with Higgs-like properties. If the conformal sector is strongly coupled, this pseudo-dilaton may be the only new state accessible at high energy colliders. We discuss the prospects for distinguishing this mode from a minimal Higgs boson at the LHC and ILC. The main discriminants between the two scenarios are (1) cubic self-interactions and (2) a potential enhancement of couplings to massless SM gauge bosons. A particularly interesting situation arises when the scale f of conformal symmetry breaking is approximately the electroweak scale v~246 GeV. Although in this case the LHC may not be able to tell apart a pseudo-dilaton from the Higgs boson, the self-interactions differ in a way that depends only on the scaling dimension of certain operators in the conformal sector. This opens the possibility of using dilaton pair production at future colliders as a probe of EWSB induced by nearly conformal new physics. | |
| dc.description | 7 pages, LaTeX | |
| dc.identifier | https://arxiv.org/abs/0708.1463 | |
| dc.identifier | http://arxiv.org/abs/0708.1463 | |
| dc.identifier | Phys.Rev.Lett.100:111802,2008 | |
| dc.identifier | doi:10.1103/PhysRevLett.100.111802 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/200668 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Light scalar at LHC: the Higgs or the dilaton? | |
| dc.type | text |