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Seesaw theories at LHC and warm dark matter

Zhang, Yue (2014) Seesaw theories at LHC and warm dark matter. In: Workshop on Dark Matter, Neutrino Physics and Astrophysics CETUP* 2013. AIP conference proceedings. No.1604. American Institute of Physics , Melville, NY, pp. 279-288. ISBN 978-0-7354-1238-5.

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Explaining the origin of neutrino masses clearly requires new physics beyond the Standard Model. I focus on the Seesaw paradigm and discuss a few simplest extensions of the SM that give Majorana masses to the active neutrinos. If realized at TeV scale, seesaw theories could manifest themselves in lepton number violating signatures at both low-energy processes and high-energy collider experiments. I summarize the constraints on the seesaw scales using the current LHC data. The left-right symmetric model connects the seesaw mechanism with the origin of parity symmetry breaking, and provides a unified framework for the simplest seesaw types. With new right-handed charged-current interactions, a TeV such model offers a plethora of new particles and exotic signatures at the LHC, and also accommodates a dark matter candidate, the lightest right-handed neutrino. A challenging question is the dark matter relic density which is typically over-produced in the early universe. The late decays of two heavier right-handed neutrinos can produce entropy and dilute the dark matter number. The key observation for this picture to work is the interplay between the freeze temperature of TeV right-handed gauge interaction and the QCD phase transition. The resulting dark matter mass is predicted to be around keV which makes the left-right model also a theory of warm dark matter. I will also comment on the fate of cosmic baryon asymmetry in this scenario.

Item Type:Book Section
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URLURL TypeDescription DOIArticle
Additional Information:© 2014 AIP Publishing LLC. Published: 24 June 2014. I would like to thank the organizers for the invitation to the PPC 2013 conference and the CETUP* workshop.
Group:Caltech Theory
Subject Keywords:Seesaw Mechanism, Left-Right Symmetry, Dark Matter, QCD Phase Transition, Entropy Production
Series Name:AIP conference proceedings
Issue or Number:1604
Classification Code:PACS: 14.60.St, 12.60.-i, 95.35.+d, 98.80.Cq, 11.30.Er
Record Number:CaltechAUTHORS:20140707-081100552
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Official Citation:Seesaw theories at LHC and warm dark matter Zhang, Yue, AIP Conference Proceedings, 1604, 279-288 (2014), DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46865
Deposited By: Tony Diaz
Deposited On:07 Jul 2014 16:28
Last Modified:10 Nov 2021 17:30

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