2011年1月19日 · when we say "composite particle" - we mean that the particle is actually a bound state of "smaller particles". Examples of composite particles are Hydrogen (made of 1 proton and 1 electron), or any other atomic nucleus. Also all the hadrons of particle physics are "composite particles" that are made up of quarks and gluons.

2012年5月9日 · In summary, composite particles are subatomic particles made up of smaller particles or combinations of different types of subatomic particles. They are different from elementary particles in that they have measurable sizes and can interact with other particles. Examples include protons, neutrons, pions, atoms, and atomic nuclei.

2014年7月20日 · Consider a composite particle. Its spin is determined by the spins of its constituent particles. But the constituent particles are in a superposition of different spin states and so don't have a definite spin. So it seems it shouldn't be possible to ascribe a definite spin to the composite particle.

2020年4月18日 · Furthermore, a menagerie of additional elementary and composite particles was discovered. The centerpiece is the set of eighteen baryons: particles, like the proton and neutron, composed of three lightweight quarks. This Insight provides an introduction to these baryons, whose discovery and classification constitute perhaps the first great ...

2014年9月4日 · In summary, Dirac's argument shows that the existence of a magnetic monopole implies the quantization of electric charge, with the smallest charge being Q_0 and all other charges being integer multiples of it. This applies to composite particles such as the proton, where the total charge must be a multiple of Q_0.

2013年7月26日 · Although I remember there was a physical interpretation to it that made things OK but I'm not sure.In summary, the mainstream view of particles is that they are point-like, infinitely small, but there are some hints that they may not be. There are also theories that suggest composite particles (like a baseball) may not have infinitesimal size.

2018年4月24日 · The basis for the composite system is ## B = \{ \ |\uparrow \uparrow \rangle, |\downarrow \uparrow \rangle, |\uparrow \downarrow \rangle, |\downarrow \downarrow \rangle \}## The Attempt at a Solution My interpretation is that question is essentially asking us to find the probability that upon measurement, the particles will be measured in the ...

2011年9月24日 · Boson is a general name for particles with integral spin (0, 1, 2). They can be elementary or composite particles. Mesons are composite particles with spin 1 so they are bosons. Gauge boson is a boson mediating interaction in a gauge theory. I'm not sure if they can be composite, but the known gauge bosons are all elementary. Photon, gluon, Z ...

2018年8月2日 · If you have a theory which claims that only composite particles decay, and that theory is internally consistent and makes even better predictions, this would certainly suggest your premise. (But such a theory should be written up, peer reviewed, and published before discussing it on these forums).

2011年12月12日 · In general how does one find the basis of a composite system of particles with different spin. Say for example spin 1, spin 1/2, and spin 5/2. My first thought was to consider the uncoupled basis wherein the particles with spin 1/2 and spin 5/2 …