Top-philic $Z^{\prime }$ Forces at the LHC

Abstract

Despite extensive searches for an additional neutral massive gauge boson at the LHC, a $Z^{\prime }$ 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 $Z^{\prime }$ and present possible UV completions. We clarify theoretical subtleties in evaluating the production of a top-philic $Z^{\prime }$ at the LHC and examine carefully the treatment of an anomalous $Z^{\prime }$ current in the low-energy effective theory. Recipes for properly computing the production rate in the $Z^{\prime }+j$ 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 $Z^{\prime }$ 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.

30 pages, 12 figures

References in corpus (12)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules - Feynman rules made easy
• Neutrino Trident Production: A Powerful Probe of New Physics with Neutrino Beams
• LHC Signals for Warped Electroweak Neutral Gauge Bosons
• Lepton flavor violating Z' explanation of the muon anomalous magnetic moment
• Four Tops for LHC
• Landau-Yang Theorem and Decays of a Z' Boson into Two Z Bosons
• Anomaly driven signatures of new invisible physics at the Large Hadron Collider
• Model-Independent Production of a Top-Philic Resonance at the LHC
• On Dark Matter Interactions with the Standard Model through an Anomalous $Z^{\prime }$
• Anomalous $Z^{\prime }$ and Diboson Resonances at the LHC
• Minimal anomalous $\mathrm{U}(1)$ theories and collider phenomenology

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