What is Weak interaction?
'''Weak interaction''', the '''weak force''' or '''weak nuclear force''',<ref>{{cite web|url=http://hyperphysics.phy-astr.gsu.edu/hbase/Forces/funfor.html|title=Fundamental Forces|website=hyperphysics.phy-astr.gsu.edu}}</ref> is one of the four [[fundamental forces]] in the [[universe]]. It is carried by [[particle]]s known as the [[W and Z bosons]], which are [[gauge boson]]s. The weak force causes [[beta decay]], a form of [[radioactivity]].<ref>{{cite web|url=https://www.windows2universe.org/?page=/kids_space/forces.html|title=What are the universal forces? - Windows to the Universe|website=www.windows2universe.org}}</ref> At extremely high energy levels, the force of weak interaction and [[electromagnetism]] begin to act the same, and this is called '''electroweak interaction'''. == Beta decay == Beta decay is what scientists call a neutron breaking down, in contrast with alpha decay where an atom breaks down. These types of breaking down are more commonly known as [[radioactive decay]]. In a beta decay a [[neutron]] breaks into a [[proton]], an [[electron]] and a [[neutrino]]. However, this is not a complete picture; there is an intermediary step. Notice that this process preserves the total [[electric charge|charge]]. [[Conservation law]]s are very important when calculating the possible outcomes of these interactions. With more detail, beta decay begins with a neutron, which is made of one [[up quark]] and two [[down quark]]s. Since up quarks have a [[electromagnetism|charge]] of +2/3, and each down quark has a charge of -1/3 this results as giving 2/3 -1/3 -1/3 = 0 charge. Due to weak force, if there are too many neutrons in an [[atomic nucleus|atom nucleus]], one of the down quarks in one of the neutrons turns into an up quark. This would change the charge of the neutron from 0 to (2/3 +2/3 -1/3) = 1. From this, the neutron is no longer a neutron, but actually a [[proton]] ( a particle with a charge of +1). In a strange [[quantum mechanics|quantum]] effect, this transformation releases a particle