Generation of baryon asymmetry in the E 6 CHM

The strongly interacting sector in the E 6 inspired composite Higgs model (E 6 CHM) with baryon number violation possesses an SU(6) × U (1) L global symmetry. In the weakly-coupled sector of this model the U (1) L symmetry associated with lepton number conservation is broken down to a Z L 2 discrete...

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Bibliographic Details
Published in:EPJ Web of conferences 2018, Vol.191, p.2004
Main Authors: Nevzorov, Roman, Thomas, Anthony
Format: Article
Language:English
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Summary:The strongly interacting sector in the E 6 inspired composite Higgs model (E 6 CHM) with baryon number violation possesses an SU(6) × U (1) L global symmetry. In the weakly-coupled sector of this model the U (1) L symmetry associated with lepton number conservation is broken down to a Z L 2 discrete symmetry, which stabilizes the proton. Near the scale f ≳ 10 TeV the SU(6) symmetry is broken down to its SU(5) subgroup, giving rise to a set of pseudo- Nambu-Goldstone bosons (pNGBs) that involves the SM-like Higgs doublet, a scalar coloured triplet and a SM singlet boson. Because f is so high, all baryon number violating operators are sufficiently strongly suppressed. Nevertheless, in this variant of the E 6 CHM the observed matter-antimatter asymmetry can be induced if CP is violated. The pNGB scalar coloured triplet plays a key role in this process and leads to a distinct signature that may be detected at the LHC in the near future.
ISSN:2100-014X
2100-014X
DOI:10.1051/epjconf/201819102004