The quark Package Diagram so far

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TRAIL: Webel SysML Parsing Analysis example: A particle physics taxonomy from Wikipedia

Section

Tags and keywords

Topic level

INTERMEDIATE

UML keywords

Association

SysML keywords

ValueType

Block

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SysML Package Diagram

As always, elements elicited in Parsing Analysis diagrams are then moved into the main model. In Package Diagrams, only selected information is exposed:

Click on the image to view it full size

This resulting diagram is a bit busier than a typical Package Diagram - and not quite as shiny as a science poster on a geek kid's bedroom wall - but it's not bad as a top-level summary of the Quark and nearest neighbour elements in the SysML model.

Note how compared with the previous Parsing Analysis diagram, a lot of elicited information has been left off, such as the Anti Associations and details of the QuarkElementaryCharge parametrics calculation etc. This information is still in the model and can be exposed as needed in more detailed focus BDDs.

By contrast, note how this Package Diagram does include some elements from other Models/Packages such as Hadron, Baryon, Neutron, Proton, to try to place the Quark in context. These elements can then be left off a focus BDD for Quark.

Up next

The Quark block's focus BDD so far

Notes

[ASSERTION]{STRICT} In Webel Parsing Analysis elicited model elements MUST eventually be moved out of the 'source' (or '0-source') Package/Model zone and under a main project Package/Model area. (Use the owner display option to check.)

[ASSERTION, DISPLAY, POLICY, SETTINGS, STYLE, TOOL]{STRICT} Webel Parsing Analysis: If you wish to show a «snippet» comment symbol (with its body text) in a presentation diagram (that is NOT a «pa» diagram) remove the '/member' tagged value from display so the only visible tagged value is 'source'.

Snippets (quotes/extracts)

The Standard Model is the theoretical framework describing all the currently known elementary particles. This model contains six flavors of quarks (q), named up (u), down (d), strange (s), charm (c), bottom (b), and top (t).

Up and down quarks have the lowest masses of all quarks.

The heavier quarks rapidly change into up and down quarks through a process of particle decay: the transformation from a higher mass state to a lower mass state.

Because of this, up and down quarks are generally stable and the most common in the universe, whereas strange, charm, bottom, and top quarks can only be produced in high energy collisions (such as those involving cosmic rays and in particle accelerators).

For every quark flavor there is a corresponding type of antiparticle, known as an antiquark, that differs from the quark only in that some of its properties (such as the electric charge) have equal magnitude but opposite sign.

Antiparticles of quarks are called antiquarks, and are denoted by a bar over the symbol for the corresponding quark, such as ū for an up antiquark.