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W and Z bosons have large masses, but they can still come into existence for short periods of time by "borrowing" energy from the vacuum. When this energy is borrowed...
Asked on 07/19/2021
2 answerCan it be possible to form an electron-positron pair from a proton-antiproton collision through the following interaction?$$p+bar{p}rightarrow[X]rightarrow e^-+e^+$$Where [X] is a particular unstable intermediate and will decay...
Asked on 07/19/2021
3 answerEntropy is a starting point for many advanced theoretical statistical mechanics books but beyond it just being negative or positive, what does it actually tell you? Specifically, what does the...
Asked on 07/19/2021
2 answerI want to show that tr($gamma^mu gamma^nu$) = 4$eta^{mu nu}$.I know that {$gamma^mu , gamma^nu$} = 2$eta^{munu}I_4$ and tr($gamma^mu gamma^nu$) = tr($gamma^nu...
Asked on 07/19/2021
1 answerI was reading Griffiths' Introduction to Electrodynamics, specifically Section 9.2.2 on plane waves. I can see that if we want a transverse wave traveling in the $z$ direction that...
Asked on 07/19/2021 by user1236
3 answerI am reading Peskin and Schroeder Section 11.4. They derive a formula for the effective action p.372 Equation 11.63 using a scalar field interaction, $$Gamma left ( phi...
Asked on 07/19/2021
0 answerHello fellow physics experts, In reference to a recent electrodynamics course a question about electric potential difference was asked. This question states why the dangling parachutist in de picture below...
Asked on 07/19/2021
0 answerIn Carroll's Spacetime and geometry section 7.5, it is deriving metric $bar h_{mu nu}$ with Lorenz gauge in terms of quadrupole moment of energy density. In Eq.[7.135], ...
Asked on 07/19/2021
1 answerI am studying Bunch-Davies vacuum. In the derivation it is important the symmetry of the background space: the vacuum is the state which is invariant under the isometries of the...
Asked on 07/19/2021
1 answerIf we immerse a sealed cup of a liquid in a fluid, what density is taken in consideration when it comes to the buoyant force, the density of the cup...
Asked on 07/19/2021
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