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Results tagged with interactions
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Particle interactions are changes in the nature, number, or state of several particles, usually at a specific space-time point, underlying dynamics. They are represented by special "field interaction terms" in quantum field theory and normally entail interchanges of energy, momentum, and sundry quantum numbers. They include scattering, and particle creation and annihilation.
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Why are there only four fundamental interactions of nature? [closed]
Is there an answer to the question why there are only four fundamental interactions of nature? …
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About an expression of Peskin and Schroeder
On page 83 of Peskin and Schroeder, they expand an interacting field $\phi(x)$ at a fixed time $t_0$ in terms of the ladder operators as $$\phi(t_0,\vec{x})=\int\frac{d^3p}{(2\pi)^3\sqrt{2E_{\vec{p}}} …
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Relation between matrix element of a process with its crossed processes
Consider a process in particle physics denoted by, $$(1) \quad a+b\to c+d$$ which is related to the reverse process $$(2)\quad c+d\to a+b.$$ By virtue of the hermiticity of the interaction Hamiltonian …
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Why are non-central nuclear forces also called tensor forces?
Experiments suggest that nuclear forces are non-central. Sometimes this is called tensor forces. Why?
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