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by hpcjoe 2324 days ago
I saw "relativistic gravitational force between neutrinos" and red flags went up. I've not read the article, just the abstract.

Doing a bit more of a look on the RLM, I found this[1] where they (mis)write the relation between inertial and rest mass. Specifically the gamma^3 factor ...

I've been out of physics for more than 20 years, so it's possible that there has been some new development since my Ph.D. Though 2 additional factors of gamma in special relativity aren't likely.

Color me ... skeptical.

I did follow their Einstein paper reference[2] to see if I had missed something. I didn't. I don't understand the origin of their 2 extra gammas in eqn 1 of the first reference. The paper abstract appears to be a continuation of that work.

From what I could determine, they need the gamma^3 term for their arguments, but it doesn't come from Einstein's paper as they claimed.

Again, I could be missing something, but I don't think I am.

[1] https://iopscience.iop.org/article/10.1088/1742-6596/738/1/0...

[2] http://fourmilab.ch/etexts/einstein/specrel/www/

2 comments

Refer to section 10 of the Einstein 1905 paper - Dynamics of the Slowly Accelerated Electron. The longitudinal mass is theorized to increase as gamma^3. This was first introduced by Lorentz. Relativistic mass is rather controversial, as can be seen by referring to Wikipedia.

It appears the current article is claiming the the inertial / gravitational mass of certain particles is gamma^3 times the rest mass of relativistic neutrinos that comprise them. Or something.

Ok, I see that now. Thanks for the pointer.
> I saw "relativistic gravitational force between neutrinos" and red flags went up.

They should. The source of gravity in relativity is not relativistic mass, as this paper appears to be claiming. It is the stress-energy tensor.

Also, the reference to "Newton's relativistic gravitational law" in the abstract looks bogus to me. There is no such thing. You can't just plug relativistic mass into Newton's gravitational law. Any GR textbook will discuss this.