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I was reading this paper on astro-ph (Sanders et al. 2020, "Models of Distorted and Evolving Dark Matter Haloes"). It's about modelling the gravitational potential in a...
Asked on 07/18/2021
1 answerAs the title points out i am trying to derive the atmospheric pressure. I understand the theory behind what i should do and how, but mathematically i have no idea...
Asked on 07/18/2021
0 answerI was studying Killing horizons in General Relativity and I met some difficulties on the following point. In a stationary, axisymmetric and asymptotically flat black hole, we know that there...
Asked on 07/18/2021
1 answerI was watching some Youtube videos of people microwaving helium and neon in a microwave. I could not find anything showing hydrogen in a microwave. However, as I...
Asked on 07/18/2021 by Grigori Rasputin
1 answerOthers have asked in general about cases in which the action integral is not minimized, but my question is specific: Can we show that the conventional action integral is always...
Asked on 07/18/2021
1 answerSo before the Higgs attains a vev (i.e., above TeV scales), does the Higgs doublet become effectively massless? The Higgs doublet $Phi$ (not the physical higgs about the nonzero...
Asked on 07/18/2021 by MKF
0 answerSpecial relativity is based on the fact that the proper time is always the same in any inertial frame: $$ds^2=(cdt)^2-dx^2=ds'^2=(cdt')^2 -dx'^2 $$ If I understand it correctly this is...
Asked on 07/18/2021
2 answerI guess one has to assume low intensities? What are notable differences in a full quantum treatment? I'm familiar with the semi-classical theory of atomic transitions (coupling classical field to...
Asked on 07/18/2021
1 answerFor electron absorption calculations (with an electric field perturbation $Delta H = eE_0x cos(omega t)$) we end up with an integral like: $$c_2(t) propto int rho(omega) left( ...
Asked on 07/18/2021
2 answerI am still learning basic quantum field theory and I am curious in what circumstances could a positron exist as a stable particle like an electron or proton, say for...
Asked on 07/18/2021 by Marcus Quinn Rodriguez Tenes
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