Recent content by jmheer

So if I understand what you are saying: 1) Quantum mechanics always applies, at all size and energy scales, but is not used for larger scales because of the complexity of the math. 2) Classical mechanics, which has much easier math, is not used for certain classes of problems because the...

As I understand it, the classical Rutherford & Bohr models where electrons are treated as point particles orbiting a nucleus do not work because the electrons would undergo centripetal acceleration to stay in orbit, and accelerating point charges radiate (Larmor equation). So the electrons would...

I've heard that classical mechanics and electromagnetics are not applicable at small sizes in particle physics. 1) At what size and energy levels are they no longer considered to be applicable at all? 2) What range of size and energy levels could be considered a "transition" area where both...

Thanks for the very detailed reply, Mitchell. It was quite helpful!

Obviously the dimensions have to work out. So it is either a ratio with respect another mass, or some formula where the units work out in a way that gives mass.

There are cases where empirical equations like the Balmer series were predictive and helped motivate later theoretical developments. I view the Koide formula as interesting, but its main value will come only if it motivates theoretical developments that help explain why the ratio is the way it is.

So if I understand what you are saying, there are currently no accepted theories and the lepton masses are considered to be arbitrary free parameters, for practical purposes. That was my understanding - thank you for confirming it, and sharing the arXiv links. -Joe

Hi, all! I'm currently studying the 3 families of leptons. 1) Are there any accepted theories about why the lepton masses are what they are? 2) What are the best journals to read about this kind of thing? I'm aware of the Koide formula, but that seems to be an empirical formula, not a theory...

Goosebumps in a good or bad way?

Name: Joseph (Joe) Heer Background: Chemical Engineering & Chemical Physics Work: Self-employed as Chemical Safety Consultant Physics Involvement: Volunteer, part-time research with local University Interests: Simplified "Effective Models" in particle physics, non-standard Energy & Information...