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Title: Top-philic Z' forces at the LHC

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. Here, 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 $Z'+j$ 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.
Authors:
 [1] ;  [2] ;  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Northwestern Univ., Evanston, IL (United States); European Organization for Nuclear Research (CERN), Geneva (Switzerland)
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Northwestern Univ., Evanston, IL (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-18-005-T; NUHEP-TH-18-01; arXiv:1801.03505
Journal ID: ISSN 1029-8479; 1647561; TRN: US1802447
Grant/Contract Number:
AC02-07CH11359; SC0010143; AC02-06CH11357; SC0007859
Type:
Accepted Manuscript
Journal Name:
Journal of High Energy Physics (Online)
Additional Journal Information:
Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2018; Journal Issue: 3; Journal ID: ISSN 1029-8479
Publisher:
Springer Berlin
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25); Northwestern Univ., Evanston, IL (United States); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 79 ASTRONOMY AND ASTROPHYSICS; Anomalies in Field and String Theories; Beyond Standard Model
OSTI Identifier:
1426667
Alternate Identifier(s):
OSTI ID: 1490088

Fox, Patrick J., Low, Ian, and Zhang, Yue. Top-philic Z' forces at the LHC. United States: N. p., Web. doi:10.1007/JHEP03(2018)074.
Fox, Patrick J., Low, Ian, & Zhang, Yue. Top-philic Z' forces at the LHC. United States. doi:10.1007/JHEP03(2018)074.
Fox, Patrick J., Low, Ian, and Zhang, Yue. 2018. "Top-philic Z' forces at the LHC". United States. doi:10.1007/JHEP03(2018)074. https://www.osti.gov/servlets/purl/1426667.
@article{osti_1426667,
title = {Top-philic Z' forces at the LHC},
author = {Fox, Patrick J. and Low, Ian and Zhang, Yue},
abstractNote = {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. Here, 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 $Z'+j$ 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.},
doi = {10.1007/JHEP03(2018)074},
journal = {Journal of High Energy Physics (Online)},
number = 3,
volume = 2018,
place = {United States},
year = {2018},
month = {3}
}