Journal
JOURNAL OF HIGH ENERGY PHYSICS
Volume -, Issue 3, Pages -Publisher
SPRINGER
DOI: 10.1007/JHEP03(2018)074
Keywords
Anomalies in Field and String Theories; Beyond Standard Model
Categories
Funding
- U.S. DOE at Northwestern [DE-SC0010143]
- U.S. DOE at ANL [DE-AC02-06CH11357]
- DoE [DE-SC0007859]
- United States Department of Energy [DE-AC02-07CH11359]
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Despite extensive searches for an additional neutral massive gauge boson at the LHC, a Z' at the weak scale could still be present if its couplings to the first two generations of quarks are suppressed, in which case the production in hadron colliders relies on tree-level processes in association with heavy flavors or one-loop processes in association with a jet. We consider the low-energy effective theory of a top-philic Z' and present possible UV completions. We clarify theoretical subtleties in evaluating the production of a top-philic Z' at the LHC and examine carefully the treatment of an anomalous Z' current in the low-energy effective theory. Recipes for properly computing the production rate in the Z' broken vertical bar j channel are given. We discuss constraints from colliders and low-energy probes of new physics. As an application, we apply these considerations to models that use a weak-scale Z' to explain possible violations of lepton universality in B meson decays, and show that the future running of a high luminosity LHC can potentially cover much of the remaining parameter space favored by this particular interpretation of the B physics anomaly.
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