![]() ![]() ![]() Okay! Part (b) asks us to write the analogous decay for the anti-proton and so we take the anti-particle for each of these and the neutral pion is strange because its anti-particle is itself and so I don't need to write a bar on top of the neutral pion and the anti-particle to the positron is the electron. This is the lepton number of concern here there's also the tau and muon lepton family numbers but they don't matter. The electron family number is also not conserved because the proton has a 0 for the electron family number whereas the electron or positron has negative 1 and the neutral pion has 0 and this should be negative 1 there so electron family number is not conserved. One serious objection is that the positronium 'nucleus' has non-zero lepton number. Other non-leptonic particles have a lepton number of 0. The lifetime of the muon is 2.20 microseconds. Each lepton has a lepton number of 1 and each antilepton has a lepton number of -1. The fact that the above decay is a three-particle decay is an example of the conservation of lepton number there must be one electron neutrino and one muon neutrino. 22 : E - p 0 (off mass shell) In all calculations we integrate over the virtual particles 4-momentum (4D integral). Virtual particles are internal to diagram(s). When we consult table, we see the proton has a baryon number of 1 and the neutral pion has a baryon number of 0 and the electron or positron has a baryon number of 0 as well so it's 1 on the left and total of 0 on the right and so baryon number is not conserved. An isolated positron is presumably as stable as an electron. The muon is a lepton which decays to form an electron or positron. In particle physics, lepton number (historically also called lepton charge)1 is a conserved quantum number representing the difference between the number. electric charge, lepton number Virtual particles do not conserve E and p. A proton decaying into a neutral pion and a positron violates the conservation of baryon number. This is College Physics Answers with Shaun Dychko. ![]()
0 Comments
Leave a Reply. |