Mass eigenstates are the quantum states of particles that have definite mass and are solutions to the free particle Hamiltonian in quantum field theory. They are crucial for understanding phenomena like neutrino oscillations, where flavor eigenstates mix to form mass eigenstates, leading to observable oscillations between different particle types.

Mass Eigenstates

Mass eigenstates

quantum states of particles

definite mass

free particle Hamiltonian

Quantum Field Theory (QFT) is a fundamental framework in theoretical physics that blends quantum mechanics with special relativity to describe how particles and fields interact. It serves as the foundation for understanding particle physics and the Standard Model, providing insights into the behavior of subatomic particles and the forces that govern them.

quantum field theory

Neutrino oscillations are a quantum phenomenon where neutrinos change between different 'flavors' (electron, muon, and tau) as they travel through space, implying that they have mass. This discovery challenges the Standard Model of particle physics, which originally considered neutrinos to be massless.

neutrino oscillations

Flavor eigenstates are specific quantum states of particles, like neutrinos or quarks, that correspond to distinct types of interactions, such as weak interactions. These states can transform into one another through a process called flavor oscillation, which is a fundamental aspect of particle physics and contributes to the understanding of phenomena like neutrino oscillations and CP violation.

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