Related Experiment Video
Updated: Dec 3, 2025

07:46
Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
8.8K
Anomaly Cancellation with an Extra Gauge Boson.
B C Allanach1, Ben Gripaios2, Joseph Tooby-Smith2
1DAMTP, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, United Kingdom.
Physical Review Letters
|October 30, 2020
Summary
Researchers found a general solution for anomaly cancellation in extensions of the standard model with an extra gauge boson and right-handed neutrinos. This addresses constraints on new particle interactions in particle physics.
Area of Science:
- High Energy Physics
- Theoretical Physics
- Particle Physics
Background:
- The Standard Model (SM) of particle physics describes fundamental particles and forces.
- Extensions to the SM often propose new particles, such as an extra gauge boson.
- Anomaly cancellation is a crucial requirement for the consistency of gauge theories.
Purpose of the Study:
- To find a general solution to the diophantine equations governing anomaly cancellation.
- To investigate the constraints on the couplings of an extra gauge boson in SM extensions.
- To consider a plausible scenario including three right-handed neutrinos.
Main Methods:
- Solving diophantine equations that arise from anomaly cancellation conditions.
- Analyzing the chiral fermion content of the Standard Model plus right-handed neutrinos.
- Applying theoretical constraints from gauge invariance and consistency.
Main Results:
- A general solution to the anomaly cancellation diophantine equations was found.
- The solution is valid for the Standard Model with three right-handed neutrinos.
- This provides a framework for understanding the couplings of new gauge bosons.
Conclusions:
- The study provides a comprehensive solution for anomaly cancellation in a specific class of SM extensions.
- The findings are relevant for phenomenological studies of new physics beyond the Standard Model.
- This work contributes to the theoretical understanding of particle interactions and new gauge bosons.
Related Concept Videos
Detection of Black Holes
2.4K
Although black holes were theoretically postulated in the 1920s, they remained outside the domain of observational astronomy until the 1970s.
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
2.4K
¹³C NMR: ¹H–¹³C Decoupling
1.4K
The probability of having two carbon-13 atoms next to each other is negligible because of the low natural abundance of carbon-13. Consequently, peak splitting due to carbon-carbon spin-spin coupling is not observed in spectra. However, protons up to three sigma bonds away split the carbon signal according to the n+1 rule, resulting in complicated spectra.
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
A broadband decoupling technique is used to simplify these complex, sometimes overlapping, signals. Broadband decoupling relies on a...
1.4K
Reduced Mass Coordinates: Isolated Two-body Problem
2.1K
In classical mechanics, the two-body problem is one of the fundamental problems describing the motion of two interacting bodies under gravity or any other central force. When considering the motion of two bodies, one of the most important concepts is the reduced mass coordinates, a quantity that allows the two-body problem to be solved like a single-body problem. In these circumstances, it is assumed that a single body with reduced mass revolves around another body fixed in a position with an...
2.1K
Conservation of Mass in Finite Cotrol Volume
1.6K
The principle of conservation of mass is a fundamental law in fluid mechanics and is applied using the continuity equation. We apply the concept to a finite control volume to derive the continuity equation.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.
A system is defined as a collection of unchanging contents, and the conservation of mass states that a system's mass is constant.
1.6K
Symmetry in Maxwell's Equations
4.0K
Once the fields have been calculated using Maxwell's four equations, the Lorentz force equation gives the force that the fields exert on a charged particle moving with a certain velocity. The Lorentz force equation combines the force of the electric field and of the magnetic field on the moving charge. Maxwell's equations and the Lorentz force law together encompass all the laws of electricity and magnetism. The symmetry that Maxwell introduced into his mathematical framework may not be...
4.0K
Nondisjunction
81.0K
During meiosis, chromosomes occasionally separate improperly. This occurs due to failure of homologous chromosome separation during meiosis I or failed sister chromatid separation during meiosis II. In some species, notably plants, nondisjunction can result in an organism with an entire additional set of chromosomes, which is called polyploidy. In humans, nondisjunction can occur during male or female gametogenesis and the resulting gametes possess one too many or one too few chromosomes.
81.0K

