"2004: A strange quark is electrically charged, carrying an amount -1/3, as does the down quark. -- Frank Close, Particle Physics: A Very Short Introduction (Oxford 2004, p. 93)"
"2004: A strange quark is electrically charged, carrying an amount -1/3, as does the down quark. -- Frank Close, Particle Physics: A Very Short Introduction (Oxford 2004, p. 93)"