On a request to Above gona an answer: The kwarks is only a concept. Phisically 1 kwark can not exist.
I do see it so. There is a plus time, zero time and minus time. An electron is a partiсle of t+, positron - of t-. When they meet - annihilate to gamma-quantum. Wave-particle of zero-time.
A parameter "strange" of elementary particles is only a time. Due to Lorenz boost
a particle with t+ will have a + coordinate from a start point and a pare particle with t- will have a minus coordinate.
Further. A picture of a world structure seems me so: