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Collider-flavour complementarity from the bottom to the top.
Oliver Atkinson1, Christoph Englert1, Matthew Kirk2
1School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ UK.
The European Physical Journal. C, Particles and Fields
|March 13, 2025
Summary
Top quark measurements at the Large Hadron Collider (LHC) offer new insights into flavour physics. These LHC top quark studies complement existing B meson data, aiding the search for new physics beyond the Standard Model.
Area of Science:
- High Energy Physics
- Particle Physics
- Flavour Physics
Background:
- Observed anomalies in the flavour sector necessitate new theoretical and experimental constraints.
- Precision measurements of B meson decays are crucial for probing physics beyond the Standard Model.
- Top quark properties are sensitive probes of new physics interactions.
Purpose of the Study:
- To analyze the potential of Large Hadron Collider (LHC) top quark measurements to constrain low-energy flavour physics.
- To bridge the gap between B meson physics and top quark phenomenology at the LHC.
- To investigate the complementarity of LHC top quark data with flavour physics constraints.
Main Methods:
- Utilizing effective field theory (EFT) to analyze four-fermion interactions without flavour structure assumptions.
- Incorporating renormalization group evolution (RGE) effects to connect different energy scales.
- Performing a comprehensive analysis of non-leptonic B decays in conjunction with top quark measurements.
Main Results:
- LHC top quark measurements are becoming increasingly competitive with, and complementary to, existing flavour physics constraints.
- The study provides a first comprehensive analysis of non-leptonic B decays within this EFT framework.
- Top quark properties, including width and pair production, are measured with percent-level precision.
Conclusions:
- The LHC's top quark physics program is a valuable tool for flavour physics and the search for new physics beyond the Standard Model.
- Top quark measurements offer complementary insights to B meson precision studies.
- EFT analysis bridging B meson and top quark scales is effective for constraining new physics.
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