2021/01/31 by Bin Yan, C.–P. Yuan, C. -P. Yuan · 18 citations
Physics and Astronomy · #Boson #Electroweak interaction #Gauge (firearms) #Higgs boson #High-Energy Particle Collisions Research #Large Hadron Collider #Muon #Pair production #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Standard Model (mathematical formulation) #hep-ex #hep-ph
paper · pdf · doi:10.1103/physrevlett.127.051801
published in Physical Review Letters 127(5), 051801 (American Physical Society) · 6 pages, 6 figurs, matches version published in PRL
openalex created_date 2021/02/01 · arxiv created 2021/07/23 · openalex publication_date 2021/07/27 · arxiv updated 2021/08/04 · openalex updated_date 2026/08/06
The bottom quark forward-backward asymmetry (AFBb) data at LEP exhibits a long-standing discrepancy with the standard model prediction. We propose a novel method to probe the Zbb[over ¯] interactions through gg→Zh production at the LHC, which is sensitive to the axial-vector component of the Zbb[over ¯] couplings. The apparent degeneracy of the anomalous Zbb[over ¯] couplings implied by the LEP precision electroweak measurements seems to be resolved by the current 13 TeV LHC Zh data, which is, however, dominated by the two data points with high transverse momentum of Z boson whose central values are in conflict with the standard model prediction. We also show the potential of the HL-LHC to either verify or exclude the anomalous Zbb[over ¯] couplings observed at LEP through measuring the Zh production rate at the HL-LHC, and this conclusion is not sensitive to the possible new physics contribution induced by top quark or Higgs boson anomalous couplings in the loop.