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Consider the decay of a particle $X$ to two particles $c$ and $d$ in the rest frame of $X$.Using energy and momentum (4-vector) conservation, show...
Asked on 12/19/2020 by Electra
2 answerLet's say we have a particle of mass $M$ attached to a point $P_0$ by some massless rod of length $T$ and it is undergoing circular motion...
Asked on 12/19/2020
1 answerYou heat up a liquid at its boiling point, and the temperature remains constant until all the liquid has turned into vapour. Since the temperature stays constant kinetic energy stays...
Asked on 12/19/2020 by G G Veracruz
1 answerThis may be a very basic question but I am not seeing how it works.Consider the standard example of an ice skate rotating about his/her center of mass and...
Asked on 12/19/2020 by user16228
2 answerI remember there is some sort of slow varying envelope approximations (SVEA) when studying wavefunctions in solids, expecially quantum wells, but can' t remember any reference. Is there a good...
Asked on 12/19/2020 by SoterX
0 answerIn a relativistic context, the energy of a "single" photon, thought of as a massless particle with an on-shell condition $p^2=0$ or $E^2=vec{p}^2$, depends on the frame. In...
Asked on 12/19/2020
1 answerWhen a process has no tree-level contribution to the amplitude but occurs e.g. at 1-loop level it is said to be loop-induced. One property of loop induced processes is when...
Asked on 12/19/2020 by AlmostClueless
1 answerSuppose I want to infer the configuration of a function $q(t)$ with $t in Omega$, where $Omega subset mathbb{R}$, given a dataset $d=[{t_1, q_1 }, ...,...
Asked on 12/19/2020 by Valentina
0 answerIn this stack-post, an equation relating the external work done and the change in potential and kinetic energy of the system was derived by the user Biophysicist. Given:...
Asked on 12/19/2020
3 answerDirac equation is given by $$(igamma^mupartial_mu-m)psi=0.$$ The matrices $gamma^mu$ satisfy the relation $${gamma^mu,gamma^nu}=gamma^mugamma^n+gamma^nugamma^mu=2g^{munu},$$ where$g^{munu}$ is the Minkowski metric. I read from Ryder's QFT textbook (pg...
Asked on 12/19/2020
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