The Quark block's focus BDD so far

For no particular reason other than to show that this form of the information is also in the model, this BDD shows the «antiparticle» Dependency relationships rather than the Anti Associations that were shown in the previous Package Diagram slide. Recall that, while such «antiparticle» Dependencies between blocks as "classes of particles" represent the antiparticle concept well, they are not available to InstanceSpecifications and can't be used to type Connectors.

Because this trail is primarily about using the Webel Parsing Analysis recipe for SysML^® for creating taxonomies, not particle physics per se, we aren't going to introduce the other quantum numbers of quarks here yet (noting also they require significantly more physics and maths). Instead, we are going to see next how quarks are important constituents of protons and neutrons.

Up next

Protons are spin-1/2 fermions and are composed of three valence quarks, making them baryons

Notes

[DISPLAY, STYLE, TIP, TOOL]{SUGGESTED} Style: use line width 2 or 3 on the border of the "focus" element in "focus" diagrams (such as the main Block or Class of a dedicated Block Definition Diagram or Class Diagram)

[NAMING, TIP]{OPTION} Optionally suffix the "focus" BDD for a Block with '.bdd' so that it won't clash with a corresponding IBD on diagram export. This is not a SysMLv1 concern, it is purely a workflow concern. It has the slight disadvantage that BDD may "indicated" twice.

[CONVENTION, DISPLAY, MODELLING, STYLE, TIP]{STRONG} Webel: SysMLv1: Highly recommend creating a "focus" Block Definition Diagram (BDD) for each main Block with expanded feature details and relationships to at least nearest neighbours

[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).

The resulting attraction between different quarks causes the formation of composite particles known as hadrons

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.