Abstract
The bottom quark forward-backward asymmetry () data at LEP exhibits a long-standing discrepancy with the standard model prediction. We propose a novel method to probe the interactions through production at the LHC, which is sensitive to the axial-vector component of the couplings. The apparent degeneracy of the anomalous couplings implied by the LEP precision electroweak measurements seems to be resolved by the current 13 TeV LHC data, which is, however, dominated by the two data points with high transverse momentum of 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 couplings observed at LEP through measuring the 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.
- Received 23 January 2021
- Revised 19 June 2021
- Accepted 6 July 2021
DOI:https://doi.org/10.1103/PhysRevLett.127.051801
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Published by the American Physical Society