Abstract
The strongly interacting sector in theE6inspired composite Higgs model (E6CHM) with baryon number violation possesses an SU(6) ×U(1)Lglobal symmetry. In the weakly-coupled sector of this model theU(1)Lsymmetry associated with lepton number conservation is broken down to aZL2discrete symmetry, which stabilizes the proton. Near the scalef≳ 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. Becausefis so high, all baryon number violating operators are sufficiently strongly suppressed. Nevertheless, in this variant of the E6CHM 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.
Highlights
The presence of baryon asymmetry and dark matter in the Universe provides strong evidence for physics beyond the Standard Model (SM)
The second, strongly interacting sector results in a set of bound states that, in particular, include the Higgs doublet and massive fields with the quantum numbers of all SM particles. These massive fields are associated with the composite partners of the quarks, leptons and gauge bosons
In the E6 inspired composite Higgs model (E6CHM) the Lagrangian of the strongly interacting sector is invariant under the transformations of an SU(6) × U(1)L global symmetry
Summary
The presence of baryon asymmetry and dark matter in the Universe provides strong evidence for physics beyond the Standard Model (SM). The second, strongly interacting sector results in a set of bound states that, in particular, include the Higgs doublet and massive fields with the quantum numbers of all SM particles. These massive fields are associated with the composite partners of the quarks, leptons and gauge bosons. Experimental limits on the value of the parameter |S | 0.002 imply that mρ = gρ f 2.5 TeV, where mρ is a scale associated with the masses of the set of spin-1 resonances and gρ is a coupling of these ρ-like vector resonances This set of resonances, in particular, involves composite partners of the SM gauge bosons. For low values of the scale f the appropriate suppression of the baryon number violating operators and the Majorana masses of the left-handed neutrino can be achieved provided global U(1)B and U(1)L symmetries, which guarantee the conservation of baryon and lepton numbers, respectively, are imposed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
