The Art of Particle Physics 125
PhysicsDavid writes to tell us about an article in Symmetry magazine. Jan-Henrik Anderson, a designer with a background in architecture, has collaborated with several particle physicists to develop visual representations of particles based on their physical characteristics. It is the closest most will ever get to 'seeing' a top quark.
Website Mistake. (Score:5, Informative)
The pdf version [symmetrymagazine.org] of the site shows the correct models.
I spent forever staring at those incorrect models trying to make sense of them, before realizing that top and down were the same, and that something must be wrong
Re:An absolutely PERFECT representation (Score:2, Informative)
Cache (Score:2, Informative)
Quark! (Score:4, Informative)
The name "quark" was taken by Murray Gell-Mann from the book "Finnegan's Wake" by James Joyce. The line "Three quarks for Muster Mark..." appears in the fanciful book. Gell-Mann received the 1969 Nobel Prize for his work in classifying elementary particles.
Mirrordot to the rescue... (Score:3, Informative)
Re:Website Mistake. (Score:2, Informative)
I may be in a devil's-advocate mood today, but... (Score:5, Informative)
Attractive, but misleading, representations (Score:4, Informative)
Moreover, as an encoder of particle properties, he has forgotten to include a bunch of those properties in his representations. There are also some funny misleading conventions too. For example, his representation does not even begin to convey how much more massive the top quark is than the up quark. So much for building intution. Also, intrinsic spin is a subtle beast and he seems to sweep the details under the carpet. For example, a spin 1/2 object (like a quark) must be be rotated 720 degrees before it returns to its original state. Making a little curley fry to represent a spin 1/2 object seems a lazy, misleading, and simply wrong.
In my opinion, while the art is an attractive visual treat (and certainly a little physics PR is not bad), it seems a long way from being a complete, useful, or pedagogical representation of these complex objects.
And yes, IAAP
Aptlets (Score:2, Informative)
Only partly mistaken (Score:3, Informative)
Particles with 3 quarks are fermions, and particles with 2 quarks (or more exactly, 1 quark and 1 anti-quark) are bosons.
However, fermions do not necessarily have 3 quarks, and bosons do not necessarily have 2 quarks. Any particle with a half-integer spin is a fermion. This includes electrons, neutrinos, and hadrons with an odd number of quark/anti-quarks. Any particle with an even-integer spin is a boson. This includes photons, gravitons, and hadrons with an even number of quark/anti-quarks. Neutron-pairs are bosons. This is important because it is responsible for the collapse of neutron stars.