LHC Constraints on a Higgs Partner from an Extended Color Sector

Abstract

We discuss the properties and LHC phenomenology of a potentially discoverable heavy scalar boson ($s$) that arises in the context of the renormalizable coloron model; the model also contains a light scalar, $h$, identifiable with the 125 GeV state discovered by the LHC. These two scalar mass eigenstates are admixtures of a weak doublet gauge eigenstate and a weak singlet gauge eigenstate. A previous study set exclusion limits on the heavy $s$ scalar, using the stability of the scalar potential, unitarity, electroweak precision tests, LHC searches for the 125 GeV Higgs; it also briefly discussed the $\sqrt{s}=7,8$ TeV LHC searches for a heavy Higgs. In this work, we show how the projected LHC sensitivity at $\sqrt{s}=14$ TeV to the presence of a heavy Higgs and to the detailed properties of the 125 GeV Higgs will further constrain the properties of the new heavy $s$ scalar. Since the renormalizable coloron model may contain spectator fermions to remove anomalies, we examine several representative scenarios with different numbers of spectator fermions. Our results are summarized in plots that overlay the current exclusion limits on the $s$ boson with the projected sensitivity of the $\sqrt{s}=14$ TeV LHC to the new state. We find that the upcoming LHC searches should be sensitive to an $s$ scalar of mass less than 1 TeV for essentially all of the model parameter space in which the $h$ state differs from the Higgs boson of the SM. More precisely, unless the mixing between the weak doublet and weak singlet gauge-eigenstate scalars is zero, the 14 TeV LHC will be sensitive to the presence of the non-standard heavy $s$ state that is characteristic of the renormalizable coloron model.

arXiv comment13 pages, 22 embedded figures

References in corpus (17)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• Top Production: Sensitivity to New Physics
• Axigluon as Possible Explanation for $p\bar{p}\to t\bar{t}$ Forward-Backward Asymmetry
• ATLAS search for new phenomena in dijet mass and angular distributions using pp collisions at sqrt(s)=7 TeV
• New Strong Interactons at the Tevatron ?
• Coloron Phenomenology
• Heavy octets and Tevatron signals with three or four b jets
• Production of Massive Color-Octet Vector Bosons at Next-to-Leading Order
• Hadron Collider Production of Massive Color-Octet Vector Bosons at Next-to-Leading Order
• A Flavorful Top-Coloron Model
• Chiral color symmetry and possible $G^{\prime }$-boson effects at the Tevatron and LHC
• Constraints on the Scalar Sector of the Renormalizable Coloron Model
• Top Quark Signature in Extended Color Theories
• Dijet Mass Spectrum Limits on Flavor-Universal Colorons
• Ultraviolet Completions of Axigluon Models and Their Phenomenological Consequences

Cited by in corpus (11)

• Minimal $SU(3)\times SU(3)$ symmetry breaking patterns
• Collider Tests of the Renormalizable Coloron Model
• Coloron-assisted Leptoquarks at the LHC
• Vacuum Stability and Triviality Analyses of the Renormalizable Coloron Model
• Diphoton Resonances in the Renormalizable Coloron Model
• Simplified Limits on Resonances at the LHC
• Hexapod Coloron at the LHC
• Kaluza-Klein gluon + jets associated production at the Large Hadron Collider
• Signal-background interference for digluon resonances at the Large Hadron Collider
• Mixed gluinos and sgluons from a new SU(3) gauge group
• Simplified Limits on New LHC Resonances