Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model

Jul 6, 2018, 6:30 PM
2h
COEX, SEOUL

COEX, SEOUL

Poster Beyond the Standard Model POSTER

Speaker

Dr Arindam Das (KIAS)

Description

Heavy Majorana neutrino pair productions at the LHC in minimal U(1) extended Standard Model 2017 In our recent paper [1], we explored a prospect of discovering the heavy Majorana right-handed neutrinos (RHNs) at the future LHC in the context of the minimal non-exotic U(1) extended Standard Model (SM), where a pair of RHNs are created via decay of resonantly produced massive U(1) gauge boson ($Z^{\prime}$). We pointed out that this model can yield a significant enhancement of the branching ratio of the $Z^\prime$ boson to a pair of RHNs, which is crucial for discovering the RHNs under the very severe LHC Run-2 constraint from the search for the $Z^\prime$ boson with dilepton final states. In this paper, we perform a general parameter scan to evaluate the maximum production rate of the same-sign dilepton final states (smoking gun signature of Majorana RHNs production) at the LHC, while reproducing the neutrino oscillation data. We also consider the minimal non-exotic U(1) model with an alternative charge assignment. In this case, we find a further enhancement of the branching ratio of the $Z^\prime$ boson to a pair of RHNs compared to the conventional case, which opens up a possibility of discovering the RHNs even before the $Z^\prime$ boson at the future LHC experiment.

Primary author

Dr Arindam Das (KIAS)

Co-authors

Prof. Nobuchika Okada (University of Alabama) Mr Digesh Raut (University of Alabama)

Presentation materials

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