Timeline for Do neutrinos travel faster than light?
Current License: CC BY-SA 3.0
8 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 19, 2017 at 14:14 | comment | added | Prahar | @SolenodonParadoxus - I completely agree. Hence I did not comment on the answer which I find perfectly acceptable. I was however commenting on his comment. | |
| Sep 19, 2017 at 4:56 | comment | added | J. Murray | @Prahar You're right. I should have said that tachyonic fields have complex mass parameters, but that their excitations are particles with real masses, so tachyonic fields do not give rise to tachyonic particles. I suppose one could debate as to whether or not the label "tachyon" should be attached to the original FTL intent+etymology or to the immediately subsequent "imaginary mass" idea ... | |
| Sep 19, 2017 at 4:53 | comment | added | Prof. Legolasov | @Prahar what you said is technically correct, but misleading :) The original question can be paraphrased as "do things travel faster than light?" and the most straightforward answer is "no". | |
| Sep 19, 2017 at 4:39 | comment | added | Prahar | @J.Murray - This is technically correct, but misleading. Tachyons simply don't exist in any stable quantum theory. A tachyonic excitation signals instability of the theory (vacuum) which implies that the vacuum decays to give the usual massive excitations. In other words, there are no tachyonic particles. Also I should say, that the very definition of tachyon (whether they exist or not) is a particle that travels faster than light, nothing more. | |
| Sep 19, 2017 at 4:18 | history | edited | Prof. Legolasov | CC BY-SA 3.0 |
edited body
|
| Sep 19, 2017 at 4:08 | comment | added | J. Murray | @hitesh No it isn't. Tachyons are particles which possess imaginary rest mass, but at the level of quantum field theory, even tachyonic particles are restricted to traveling below the vacuum speed of light. | |
| Sep 19, 2017 at 3:58 | comment | added | hitesh | Theoritically it is proved that tachyons move faster than light | |
| Sep 19, 2017 at 3:26 | history | answered | Prof. Legolasov | CC BY-SA 3.0 |