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R-parity conservation from a top down perspective

Research output: Contribution to journalArticle

Bobby S. Acharya, Gordon L. Kane, Piyush Kumar, Ran Lu, Bob Zheng

Original languageEnglish
Article number1
Number of pages20
JournalJournal of High Energy Physics
Issue number10
Publication statusPublished - 1 Oct 2014

King's Authors


Motivated by results from the LHC and dark matter searches, we study the possibility of phenomenologically viable R-parity violation in SU(5) GUT models from a top-down point of view. We show that in contrast to the more model dependent bounds on the proton lifetime, the limits on neutrino masses provide a robust, stringent and complementary constraint on all SU(5) GUT-based R-parity violating models. Focusing on well-motivated string/M theory GUT frameworks with mechanisms for doublet-triplet splitting and a solution to the /μ/B/μ problems, we show that imposing the neutrino mass bounds implies that R-parity violation is disfavored. The arguments can also be generalized to minimal SO(10) GUTs. An experimental observation of R-parity violation would, therefore, disfavor such classes of top-down GUT models.

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