Timeline for Why doesn't the decay mode of negative omega conserve rest mass?
Current License: CC BY-SA 3.0
13 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 5, 2015 at 19:29 | history | edited | rob♦ | CC BY-SA 3.0 |
units in upright font
|
| Jun 5, 2015 at 19:28 | comment | added | rob♦ | Do you mean to have the $\pi^-$ with negative mass in your question? Rest masses are always positive. | |
| Jun 5, 2015 at 11:05 | comment | added | Physkid | @Omry Thank you. Helps to get subtleties and conventions out of the way. | |
| Jun 5, 2015 at 11:02 | comment | added | Omry | No, in the standard model, all masses are positive. | |
| Jun 5, 2015 at 10:59 | comment | added | Physkid | @JohnRennie This makes sense. Good time to recall concepts on SR. Also, for an particle A with rest mass, M, do we perform a negation on the rest mass such that the rest mass for the antiparticle of A has rest mass, -M? | |
| Jun 5, 2015 at 10:44 | comment | added | Omry | Rest mass isn't conserved, best example I can think of this is $H\rightarrow \gamma\gamma$ | |
| Jun 5, 2015 at 10:38 | comment | added | John Rennie | @Physkid: in quantum field theory mass can change into (kinetic) energy and vice versa. That's how two 1GeV protons can produce a 125GeV Higgs boson in the LHC. In this case mass is being converted into kinetic energy. If you add up the total energy given by $E^2 = p^2c^2 + m^2c^4$ before and after you'll find it is constant. | |
| Jun 5, 2015 at 10:37 | review | Close votes | |||
| Jun 5, 2015 at 19:29 | |||||
| Jun 5, 2015 at 10:16 | comment | added | innisfree | Hello, your question is perfectly sensible, but I think it's been asked and answered here before. I suggest you read the above the question and answers. For that reason, I'm suggesting that this question is closed. | |
| Jun 5, 2015 at 10:15 | comment | added | innisfree | possible duplicate of Is (rest) mass conserved in special relativity? | |
| Jun 5, 2015 at 10:14 | comment | added | Physkid | @JohnRennie John, could you elaborate? | |
| Jun 5, 2015 at 10:10 | comment | added | John Rennie | The mass deficit goes into the kinetic energy of the decay products | |
| Jun 5, 2015 at 10:07 | history | asked | Physkid | CC BY-SA 3.0 |