Abstract
We investigate the potential of the Large Hadron Collider (LHC) to probe one of the most compelling beyond the Standard Model frameworks---walking technicolor (WTC), involving strong dynamics and having a slowly running (walking) new strong coupling. For this purpose we use recent LHC Run 2 data to explore the full parameter space of the minimal WTC model using dilepton signatures from heavy neutral ${Z}^{\ensuremath{'}}$ and ${Z}^{\ensuremath{'}\ensuremath{'}}$ resonances predicted by the model. This signature is the most promising one for discovery of WTC at the LHC for the low-intermediate values of the $\stackrel{\texttildelow{}}{g}$ coupling---one of the principle parameters of WTC. We have demonstrated complementarity of the dilepton signals from both resonances, established the most up-to-date limit on the WTC parameter space, and provided projections for the LHC potential to probe the WTC parameter space at higher future luminosities and upgraded energy. We have explored the whole four-dimensional parameter space of the model and have found the most conservative limit on the WTC scale ${M}_{A}$ above 3 TeV for the low values of $\stackrel{\texttildelow{}}{g}$, which is significantly higher than previous limits established by the LHC collaborations.
Highlights
With the discovery of a Higgs boson at the Large Hadron Collider (LHC) [1,2] it has become possible and imperative to discover the true origin of mass in the Universe
We investigate the potential of the Large Hadron Collider (LHC) to probe one of the most compelling beyond the Standard Model frameworks—walking technicolor (WTC), involving strong dynamics and having a slowly running new strong coupling
It is important to stress that the most conservative limit on MA is about 3.1 TeV for low values of gand that this limit is significantly higher than previous limits established by the ATLAS Collaboration in Refs. [21,22] for S 1⁄4 0.3, s 1⁄4 0 benchmark in the (MA, g; S; s) plane, which gives one of the most optimistic limits for next to minimal walking technicolor model (NMWT)
Summary
With the discovery of a Higgs boson at the Large Hadron Collider (LHC) [1,2] it has become possible and imperative to discover the true origin of mass in the Universe. Technicolor (WTC) [6,7,8,9,10,11] and its recent developments [12,13,14,15,16,17,18] are very compelling BSM candidates for the underlying theory of nature It has a strong coupling αTC with a very slowly running (“walking”) regime between the TC energy scale and high energy extended-TC scale. Using LHC Run 1 dilepton data, the ATLAS Collaboration has interpreted experimental limits on a new heavy neutral resonance in the context of the WTC parameter space in Refs.
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