Ruling out minimal anomaly free U(1) extensions of the Standard Model
2016 (English)Article in journal (Refereed) Submitted
We consider minimal anomaly free U(1) extensions of the Standard Model with three generations of right-handed neutrinos and a complex scalar. Assuming all fields are charged under the new U(1) group, we find that in a wide class of such models the only free parameter in the gauge sector is MZ′, the mass of the new gauge boson Z′. Interestingly, we find that the production cross section of Z′ is independent of the U(1) gauge coupling gz. Assuming the right-handed neutrinos are Majorana fermions, we arrive at a peculiar relation where gz becomes a function of MZ′. Using perturbativity requirements and the 13 TeV LHC dijet and dilepton data, we show that minimal anomaly free U(1) models are strongly disfavored, with the exception of B−L models. We discuss different aspects of these models and indicate possible extensions that can alleviate some restrictions and bypass the constraints.
Place, publisher, year, edition, pages
Research subject Physics with specialization in Elementary Particle Physics
IdentifiersURN: urn:nbn:se:uu:diva-301819OAI: oai:DiVA.org:uu-301819DiVA: diva2:955328
FunderCarl Tryggers foundation , CTS-14:206Swedish Research Council, 621-2011-5107