Wednesday, June 12, 2013

1306.2342 (Chien-Yi Chen et al.)

Probing Heavy-Light Neutrino Mixing in Left-Right Seesaw Models at the

Chien-Yi Chen, P. S. Bhupal Dev, R. N. Mohapatra
We show that in TeV-scale left-right symmetric seesaw models, there is a new dominant contribution to the collider signal of heavy Majorana neutrinos arising from the heavy-light neutrino mixing, which directly probes the seesaw matrix. We propose a way to distinguish this contribution from the widely discussed one that only probes the Majorana nature of the heavy right-handed neutrinos, by analyzing some simple kinematical variables. We also find that the existing LHC data already yield stronger constraints on the heavy-light neutrino mixing, which will improve as more data are collected.
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