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The idea of left-right symmetry with mirror fermions is very appealing fromthe symmetry point of view. In this picture, unlike the Standard Model, thesymmetry is not only left-right symmetric, but each left handed fermionmultiplet is accompanied by new right handed fermion multiplet of oppositechirality. In this work, we consider a gauge symmetry, $SU(3)_c \otimesSU(2)_L\otimes SU(2)_R \otimes U(1)_{Y^\prime}$ supplemented by a discrete$Z_2$ symmetry. Instead of having right handed multiplets for each left handedmultiplets of the same fermions as in the usual left-right model, the mirrormodel include right handed doublets involving new fermions (called mirrors),and similarly for each right handed singlet, there are corresponding mirrorsinglets. Thus the gauge anomaly is naturally absent in this model, and themodel also provide a solution for the strong CP problem because of parityconservation. The first stage of symmetry breaking is achieved by a doubletmirror Higgs with a vacuum expectation value $\simeq 10^7$ GeV, needed toexplain the neutrino mass $\simeq 10^{-11}$ GeV. The mirror fermions can mixwith the ordinary fermions via a scalar which is singlet under the gaugesymmetry. In this model, only light mirror particles, having masses in the fewhundred GeV range are $\hat{e}, \hat{u}, \hat{d}$ with well-defined spectrum.$\hat{u}$ and $\hat{d}$ can be pair produced at the LHC, and can be detected as($u Z$) and ($d Z$) resonances. We discuss the signals of these mirror fermionsat the LHC, and find that the reach at the LHC can be as large as $m_{\hatq}\simeq 800$ GeV.

Collider signatures of mirror fermions in the framework of Left Right Mirror Model