Lepton Flavor Violation (LFV) refers to processes in which a lepton of one flavor changes into a lepton of another flavor, which is not allowed in the Standard Model of particle physics without neutrino masses. The observation of LFV would indicate new physics beyond the Standard Model, such as supersymmetry or other extensions that allow for flavor-changing neutral currents in the lepton sector.

Lepton Flavor Violation

lepton of one flavor

lepton of another flavor

The Standard Model of Particle Physics is a well-established theory that describes three of the four known fundamental forces in the universe and classifies all known subatomic particles. It successfully explains electromagnetic, weak, and strong nuclear interactions but does not incorporate gravity or account for dark matter and dark energy.

Standard Model of particle physics

Neutrino masses are a fundamental aspect of particle physics, indicating that neutrinos, previously thought to be massless, have a very small but non-zero mass. This discovery has profound implications for the Standard Model of particle physics, cosmology, and our understanding of the universe's matter-antimatter asymmetry.

neutrino masses

observation of LFV

new physics beyond the Standard Model

Supersymmetry is a theoretical framework in particle physics that postulates a symmetry between fermions and bosons, aiming to unify the fundamental forces and address unresolved issues in the Standard Model, such as the hierarchy problem. Although no experimental evidence for supersymmetry has yet been found, it remains a significant area of research due to its potential to explain dark matter and provide a pathway to a more comprehensive theory of everything.

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