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Journal Article

Reconciling the 2 TeV Excesses at the LHC in a Linear Seesaw Left-Right Model


Rodejohann,  Werner
Werner Rodejohann - ERC Starting Grant, Junior Research Groups, MPI for Nuclear Physics, Max Planck Society;

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Deppisch, F. F., Graf, L., Kulkarni, S., Patra, S., Rodejohann, W., Sahu, N., et al. (2016). Reconciling the 2 TeV Excesses at the LHC in a Linear Seesaw Left-Right Model. Physical Review D, 93(1): 013011. doi:10.1103/PhysRevD.93.013011.

Cite as: http://hdl.handle.net/11858/00-001M-0000-002B-05B7-E
We interpret the 2 TeV excesses at the LHC in a left-right symmetric model with Higgs doublets and spontaneous $D$-parity violation. The light neutrino masses are understood via a linear seesaw, suppressed by a high $D$-parity breaking scale, and the heavy neutrinos have a pseudo-Dirac character. In addition, with a suppressed right-handed gauge coupling $g_R / g_L \approx 0.6$ in an $SO(10)$ embedding, we can thereby interpret the observed $eejj$ excess at CMS. We show that it can be reconciled with the diboson and dijet excesses within a simplified scenario based on our model. Moreover, we find that the mixing between the light and heavy neutrinos can be potentially large which would induce dominant non-standard contributions to neutrinoless double beta decay via long-range $\lambda$ and $\eta$ neutrino exchange.