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captain
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are bosons represented by a scalar field and fermions represented by a spin 1/2 field or how does it work?
Bosons have integer spin (0,1,2...). Fermions have half-integer spin (1/2, 3/2, ...)captain said:are bosons represented by a scalar field and fermions represented by a spin 1/2 field or how does it work?
strangerep said:Bosons have integer spin (0,1,2...). Fermions have half-integer spin (1/2, 3/2, ...)
A scalar field is a spin zero field. For spin one you'd need a vector field and for spin two you'd need a second rank tensor field.captain said:does that mean a scalar field is a spin zero field or is it an integer spin field?
Son Goku said:A scalar field is a spin zero field. For spin one you'd need a vector field and for spin two you'd need a second rank tensor field.
A spin-1/2 particle is described using a Lorentz/Dirac Spinor Field. There are no “fundamental” spin-3/2 particles so the field that would describe it isn’t used that often. However if you know representation theory you can easily see what the field’s properties are like.captain said:what about a spin 1/2 or spin 3/2?
Yes, there is a different propagator for each field as they have different Hamiltonians. There is also a different Feynman propagator for each free particle species of a given spin.*captain said:is there a different propagator for each spin field?
A scalar field is a physical quantity that has a single value at each point in space. It can be thought of as a mathematical function that assigns a scalar value (such as temperature or pressure) to every point in a physical space.
A spin 1/2 field is a type of quantum field that describes particles with a spin of 1/2, such as electrons. Spin is a fundamental property of particles that determines their angular momentum and behavior under certain physical interactions.
Scalar fields and spin 1/2 fields are both types of quantum fields that describe different properties of particles. While scalar fields describe scalar quantities like temperature or pressure, spin 1/2 fields describe the spin property of particles.
Spin 1/2 fields are significant in physics because they describe fundamental particles, such as electrons, that make up the building blocks of matter. Understanding the behavior of these particles is crucial in understanding the physical world.
Scalar fields and spin 1/2 fields cannot be directly observed or measured, as they are quantum fields that exist in the theoretical realm. However, their effects can be observed and measured through experiments and observations of the particles they describe.