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Gauge/Gravity Dynamics for Composite Higgs Models and the Top Mass
Johanna Erdmenger1, Nick Evans2, Werner Porod1
1Institute for Theoretical Physics and Astrophysics, Julius-Maximilians-Universität Würzburg, 97074 Würzburg, Germany.
Physical Review Letters
|March 5, 2021
Summary
We developed gauge/gravity dual models for composite Higgs, calculating particle masses and decay constants. Our findings align with lattice data and offer insights into fermion content effects on bound state masses.
Area of Science:
- High Energy Physics
- Quantum Field Theory
- String Theory
Background:
- Composite Higgs models offer an alternative to the Standard Model Higgs.
- The AdS/CFT correspondence provides a powerful tool for studying strongly coupled systems.
- Nonconformal examples of AdS/CFT offer new insights into realistic model building.
Purpose of the Study:
- To provide gauge/gravity dual descriptions of strong coupling in composite Higgs models.
- To calculate particle masses and pion decay constants for specific gauge theories (Sp(4) and SU(4)).
- To compare theoretical predictions with existing lattice data and explore model flexibility.
Main Methods:
- Utilizing gauge/gravity duality derived from nonconformal AdS/CFT correspondence.
- Calculating bound state properties (particle masses, decay constants) for Sp(4) and SU(4) gauge theories.
- Investigating the impact of varying fermion content on theoretical predictions.
Main Results:
- Favorable comparison of calculated particle masses and pion decay constants with lattice studies.
- Demonstrated that fermion content significantly influences running dynamics and bound state masses.
- Successfully described top partners using a dual fermionic field in the bulk.
Conclusions:
- Gauge/gravity duality provides a viable framework for studying composite Higgs models.
- The choice of fermion content is crucial for accurately predicting physical observables.
- Incorporating higher-dimension operators can yield Standard Model-consistent top masses.
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