Abstract
We present a new model that extends the Standard Model (SM) with the local B + L symmetry, and point out that the lightest new fermion ζ, introduced to cancel anomalies and stabilized automatically by the B + L symmetry, can serve as the cold dark matter candidate. We study constraints on the model from Higgs measurements, electroweak precision measurements as well as the relic density and direct detections of the dark matter. Numerical results reveal that the pseudo-vector coupling of ζ with Z and the Yukawa coupling with the SM Higgs are highly constrained by the latest results of LUX, while there are viable parameter space that could satisfy all the constraints and give testable predictions.
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Chao, W., Guo, HK. & Zhang, Y. Majorana dark matter with B+L gauge symmetry. J. High Energ. Phys. 2017, 34 (2017). https://doi.org/10.1007/JHEP04(2017)034
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DOI: https://doi.org/10.1007/JHEP04(2017)034