Local anomalies in Z’ models

Particle Physics Theory seminar

Local anomalies in Z’ models

  • Event time: 1:00pm
  • Event date: 29th April 2020
  • Speaker: Joseph Tooby-Smith (University of Cambridge)
  • Location: Higgs Centre Seminar Room, Room 4305,

Event details

In this talk I will follow the work presented in arXiv:1912.10022 in which we consider local (or perturbative) gauge anomalies in models featuring an extra Z′ boson compared to the Standard Model (SM), along with n SM-singlet fermions. Assuming that the gauge group is compact, we give a general solution to the anomaly cancellation conditions (ACCs) for the ACCs that involve only SM fermions and we examine whether a corresponding solution exists for the remaining ACCs. We argue that this should be adequate for the purposes of phenomenology, at least for the time being. We show that a solution to the remaining ACCs always exists for n≥5 in the family non-universal case or n≥3 in the family-universal case. In the special case where only a single family carries non-vanishing charges, we find a general solution to all ACCs, for any value of n.

About Particle Physics Theory seminars

The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..

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