Speaker
Description
We investigate the phenomenology of the electroweak gauge bosons $W^{+}$, $W^{-}$, $Z^{0}$, and the Higgs boson as composite states of new fermions governed by strong dynamics. To produce these composite particles, we propose a model in which production occurs through the Drell-Yan process, $q \ \bar{q} \rightarrow q_{TC} \ \bar{q}_{TC}$, where $q_{TC}$ denotes a technicolor quark forming a doublet under a flavour group $SU(2)$. The technicolor sector connects to the Standard Model (SM) sector via $\gamma^{*}/Z^{0}$, preserving the electroweak gauge group, and is charged under the new strong gauge group $SU(N)_{TC}$, while the incoming SM quarks are singlets under $SU(N)_{TC}$. In our model, proton-proton (pp) collisions occur at center-of-mass energy $\sqrt{s} = 100 \ \mathrm{TeV}$.
The technicolor quarks undergo fragmentation, producing additional technicolor quarks, which, through hadronization, form hadrons at a composite scale $\Lambda \approx 1 \ \mathrm{TeV}$. These hadrons include technicolor mesons, such as pions and eta ($\Pi^{+}$, $\Pi^{-}$, $\Pi^{0}$, and $\eta$), bound states of technicolor quarks. These technicolor mesons are analogous to the electroweak gauge bosons $W^{+}$, $W^{-}$, $Z^{0}$, and the Higgs boson.
To illustrate the process, we draw an analogy with QCD, comparing it to the process $e^{+} e^{-} \rightarrow q \ \bar{q}$, where $q$ represents SM quarks. In this analogy, the incoming leptons are singlets under the color gauge group $SU(3)_{c}$, while outgoing SM quarks are charged under $SU(3)_{c}$, with both initial and final particles preserving the electroweak gauge group $SU(2)_{L} \otimes U(1)_{Y}$. Following hadronization, the final-state hadrons are produced at the QCD scale $\Lambda \approx 1 \ \mathrm{GeV}$.
Since these technicolor mesons are invisible, we model their decay back to the SM particles and reconstruct the fast jets from the final-state particles at the detector level. We observe a dijet-like situation similar to the QCD dijets and study the signatures of the final-state particles. Our model aims to probe the potential existence of composite states at high energies, motivated by the search for new dynamics beyond the Standard Model and insights into electroweak symmetry breaking mechanisms. This work is useful for exploring physics at the 100 TeV collider, composite models, and related phenomena.
| Field of contribution | Phenomenology |
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