6/25/2023 0 Comments Spin of dawn![]() The antiparticle of the down quark is the down antiquark (sometimes called antidown quark or simply antidown), which differs from it only in that some of its properties have equal magnitude but opposite sign. Like all quarks, the down quark is an elementary fermion with spin 1 / 2, and experiences all four fundamental interactions: gravitation, electromagnetism, weak interactions, and strong interactions. ![]() ![]() The down quark is part of the first generation of matter, has an electric charge of − 1 / 3 e and a bare mass of 4.7 +0.5 Because they are found in every single known atom, down quarks are present in all everyday matter that we interact with. The proton is made of one down quark with two up quarks, and the neutron is made up of two down quarks with one up quark. Down quarks are most commonly found in atomic nuclei, where it combines with up quarks to form protons and neutrons. The down quark is the second-lightest of all quarks, and combines with other quarks to form composite particles called hadrons. ![]() ![]() The down quark (symbol: d) is a type of elementary particle, and a major constituent of matter. Stable or up quark + electron + electron antineutrino ![]()
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