Particle physics is the study of the fundamental forces of nature as they are embodied in the interactions of elementary and composite particles at high energies and short time and distance scales. DO NOT USE THIS TAG for point particles in classical mechanics.

An Introduction to the Standard Model of Particle Physics. 2007. It does not assume previous QFT knowledge, but it only reviews it somewhat superficially. The thorough discussion is on particle physics, and when it comes to that, it is pretty detailed and up-to-date (e.g., massive neutrinos, etc.). Schwartz.

A resonance (in particle physics) is the peak located around a certain energy found in functions that quantify the given rate at which scattered particles can be detected at a given angle (in scattering experiments).

2011年4月21日 · The primary example in this category is CP-violation, which strongly limits the range of allowed models of new physics up to scales of several TeV. There are good a priori reasons to expect the existence of some non-SM CP-violating processes, and finding them is of comparable importance to addressing electroweak symmetry breaking.

For example, a spin 1/2 particle's wavefunction will gain a minus sign under a 360 degree rotation, as the rotation changes the complex phase of the wavefunction. The particle's chirality determines in a sense which way around the complex plain this phase travels to reach the -1, travelling in either a left handed way from 1 to -1, or a right ...

$\begingroup$ Frequency is a physical thing, but is hard for our feeble minds to interpret. If psi = e^(i(kx - wt)), then the electron will oscillate through time and space, and will oscillate in the complex plane.

All of particle physics pretty much comes down to calculating decay rates or scattering cross sections. In either case, the quantity you calculate is a function of the momenta of the initial and final particles.

2012年1月11日 · $\begingroup$ @QuantumDot: It's harshness is accurate, the field theorists didn't understand S-matrix, and drove all the practitioners out of physics (including many early string giants). The theory was too sophisticated for the 1960s stoners, it's not baby-boom physics. Ask anna v for 1st hand experience.

2025年1月26日 · TLDR - physics is not the universe. It is a mathematical description of the behavior of the universe. The universe is real, but physics is not. As Ghoster says, saying what is real isn't what physics is for. It is for saying how whatever is real behaves. $\endgroup$ –

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