Light pseudoscalar eta and H->eta eta decay in the simplest little Higgs mode

Simple item page
dc.creatorCheung, Kingman
dc.creatorSong, Jeonghyeon
dc.date2006-11-23
dc.date2007-02-09
dc.date.accessioned2026-07-07T11:22:11Z
dc.date.available2026-07-07T11:22:11Z
dc.descriptionThe SU(3) simplest little Higgs model in its original framework without the so-called mu term inevitably involves a massless pseudoscalar boson eta, which is problematic for b-physics and cosmological axion limit. With the mu term introduced by hand, the eta boson acquires mass m_eta ~ mu, which can be lighter than half the Higgs boson mass in a large portion of the parameter space. In addition, the introduced mu term generates sizable coupling of H-eta-eta. The Higgs boson can dominantly decay into a pair of eta's especially when mH below the WW threshold. Another new decay channel of H->Z+eta can be dominant or compatible with H -> WW for mH above the Z+eta threshold. We show that the LEP bound on the Higgs boson mass is loosened to some extent due to this new H->eta eta decay channel as well as the reduced coupling of H-Z-Z. The Higgs boson mass bound falls to about 110 GeV for f=3-4 TeV. Since the eta boson decays mainly into a bb pair, H-> eta eta -> 4b and H-> Z eta -> Z bb open up other interesting search channels in the pursuit of the Higgs boson in the future experiments. We discuss on these issues.
dc.descriptionmajor modification considering the simplest little Higgs model with the mu term
dc.identifierhttps://arxiv.org/abs/hep-ph/0611294
dc.identifierhttp://arxiv.org/abs/hep-ph/0611294
dc.identifierPhys.Rev.D76:035007,2007
dc.identifierdoi:10.1103/PhysRevD.76.035007
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/194482
dc.subjectHigh Energy Physics - Phenomenology
dc.titleLight pseudoscalar eta and H->eta eta decay in the simplest little Higgs mode
dc.typetext

Files

Collections

arXiv