Good breakdown of why this is probably just noise <a href="https://www.forbes.com/sites/startswithabang/2019/11/26/this-is-why-the-x17-particle-and-a-new-fifth-force-probably-dont-exist/#598bdf3d2e82" rel="nofollow">https://www.forbes.com/sites/startswithabang/2019/11/26/this...</a>
> Examining the number of electron–positron pairs at different angles of separation, the researchers found an unexpected surplus of pairs at a separation angle of about 140º.<p>I keep reading about this "angle" in regards to beryllium-8 and X17. Can someone ELI5 for a non-physics person what it means for particles to come off at a certain angle?
I find it interesting that there is no mention of NA64's sensitivity to the particle. Is it possible to say from the Atomki institute experiments what is the rate of production expected at NA64? Somehow LHCb will be able to refute or confirm but only by 2023.
If you understand Spanish, here is a video of a complete and easy to grasp introduction to what this new force is, what it means and how it was discovered:<p><a href="https://youtu.be/u_O2hW2J8TE" rel="nofollow">https://youtu.be/u_O2hW2J8TE</a>