The quark compositions of the proton and neutron are, respectively, uud and udd, where u is an up quark (charge + 23 e2 and d is a down quark (charge - 13 e2. There are also antiup u (charge - 23 e2 and antidown d (charge + 13 e2 quarks. The combination of a quark and an antiquark is called a meson. The mesons known as pions have the composition p+ = ud and p- = ud. Suppose a proton collides with an antineutron. During such collisions, the various quarks and antiquarks annihilate whenever possible. When the remaining quarks combine to form a single particle, it is aA. Proton B. Neutron C. p+ D. p

Q: Why do leptons have integral charge while quarks have fractional charge?

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Q: (a) What particle has the quark composition u u d ?(b) What should its decay mode be?

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Q: Baryons need to be made up of an odd number of quarks. Give reason?

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Q: What is the repulsive for (in N) between two protons if the distance between them is 58nm?

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Q: What is the electrical charge of the baryons with the quark compositions (a) uud-  and (b)udd? What…

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Nuclear interactions

In nature, there are certain rules and standards for an interaction. These interactions are universally accepted. There are four types of interactions: