Production and decays of the light pseudoscalar boson $\eta$ at the LHC in the simplest little Higgs model

Abstract

In many extensions of the standard model, the Higgs sector often contains an additional pseudoscalar boson. A good example is the SU(3) simplest little Higgs model, which accommodates a light pseudoscalar boson $\eta$ with quite different characteristics from those in other multi-Higgs-doublet models. We study various phenomenological signatures of the $\eta$ at the LHC. In particular, we calculate in details both production and decays in the Drell-Yan type channel $q\bar{q}\to Z/Z^{\prime }\to h\eta$, and in the associated production with a $t\bar{t}$ pair, $gg(q\bar{q})\to t\bar{t}\eta$. We emphasize the ${\tau }^{+}{\tau }^{-}$ decay mode of the $\eta$ boson when its mass is below the $b\bar{b}$ threshold. We show that $t\bar{t}\eta$ production is in fact large enough to give a sizable number of events while suppressing the backgrounds. We also comment on the direct gluon fusion process and the indirect decay from the heavy $T$ quark ($T\to t\eta$)

arXiv comment25 pages, 10 figures; references added

References in corpus (16)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Search for the Standard Model Higgs Boson at LEP
• Electroweak symmetry breaking from dimensional deconstruction
• The Littlest Higgs
• The Minimal Moose for a Little Higgs
• Little Higgs Models and Their Phenomenology
• The Little Higgs from a Simple Group
• The Simplest Little Higgs
• Smoking-gun signatures of little Higgs models
• Role of h --> eta eta in Intermediate-Mass Higgs Boson Searches at the Large Hadron Collider
• Pseudo-axions in Little Higgs models
• Implications for New Physics from Fine-Tuning Arguments: II. Little Higgs Models
• Distinguishing Little-Higgs Product and Simple Group models at the LHC and ILC
• Light pseudoscalar eta and H->eta eta decay in the simplest little Higgs mode
• Associated production of a single heavy T-quark in the littlest and simplest little Higgs models

Cited by in corpus (17)

• Complex Scalar Dark Matter vis-à-vis CoGeNT, DAMA/LIBRA and XENON100
• Search for NMSSM Higgs bosons in the h->aa->mumu mumu, mumu tautau channels using ppbar collisions at sqrt{s}=1.96 TeV
• LHC discovery potential of the lightest NMSSM Higgs in the h1 -> a1 a1 -> 4 muons channel
• Higgs-pair Production and Decay in Simplest Little Higgs Model
• The LHC di-photon Higgs signal predicted by little Higgs models
• Higgs boson production in photon-photon collision at ILC: a comparative study in different little Higgs models
• tbW vertex in the Littlest Higgs Model with T-parity
• Lightness of a Higgs Boson and Spontaneous CP-violation in the Lee Model: An Alternative Scenario
• Lepton flavor violation within the Simplest Little Higgs model
• Spontaneous CP-violation in the Simplest Little Higgs Model and its Future Collider Tests: the Scalar Sector
• On the $ZH\eta$ vertex in the simplest Little Higgs Model
• Rare Z-decay into light pseudoscalar bosons in the simplest little Higgs model
• Phenomenology of A Little Higgs Pseudo-Axion
• Discrimination of the light CP-odd scalars between in the NMSSM and in the SLHM
• On-shell $WW\gamma$ vertex in the T-Parity and non T-Parity Littlest Higgs model
• Pseudoscalar boson and SM-like Higgs boson productions at LHC in simplest little Higgs model
• Simplest Little Higgs Revisited: Hidden Mass Relation, Unitarity and Naturalness