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Related Experiment Video

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Safe Experimentation in Optical Levitation of Charged Droplets Using Remote Labs

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Published on: January 10, 2019

Mass Difference for Charged Quarks from Asymptotically Safe Quantum Gravity.

Astrid Eichhorn¹, Aaron Held¹

¹Institut für Theoretische Physik, Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany.

Physical Review Letters

|October 27, 2018

Summary

This summary is machine-generated.

We propose a quantum gravity model that explains the top and bottom quark masses and gauge coupling. Antiscreening fluctuations create a fixed point, yielding viable infrared values and a dynamically generated mass difference between quarks.

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Area of Science:

Theoretical Physics
Quantum Gravity
Particle Physics

Background:

The Standard Model describes fundamental particles and forces but lacks a complete explanation for particle masses.
Quantum gravity effects are crucial for understanding physics at high energies and potentially for mass generation.

Purpose of the Study:

To retrodict the top and bottom quark masses and the Abelian gauge coupling from first principles.
To investigate the role of quantum gravity in generating particle mass differences.

Main Methods:

A microscopic model incorporating quantum gravity was developed.
Antiscreening quantum-gravity fluctuations were analyzed to identify fixed points.
The impact of gauge and gravity fluctuations on Yukawa couplings was studied.

Main Results:

An asymptotically safe fixed point for the Abelian hypercharge was identified, leading to observationally viable infrared values.
Unequal quantum numbers of top and bottom quarks resulted in distinct fixed-point values for their Yukawa couplings.
A dynamically generated mass difference between the top and bottom quarks was achieved.

Conclusions:

The proposed quantum gravity model successfully retrodicts key parameters, including particle masses and gauge couplings.
The model provides a mechanism for the dynamical generation of mass differences based on fundamental principles.
The calculated ratio of electric charges for bottom and top quarks closely matches the Standard Model value.